It retrieves a scalar value In the below, we specify it as $.Employees. The OPENJSON function is quite useful if you need to extract or transpose your JSON data into columns. We do this using a combination of path expressions and the JSON_VALUE function. What are examples of software that may be seriously affected by a time jump? It returns a NULL value in the output, as shown below. rev2023.3.1.43266. 1 messages. We provide a JSON field and a path expression. How to delete all UUID from fstab but not the UUID of boot filesystem. JSON support in SQL Server and Azure SQL Database lets you combine relational and NoSQL concepts. We can also add a constraint to ensure it is valid JSON. We have also added the color, material, and height into the SELECT clause. For example, lets say we want to select all products where the color is brown. Server JSON functions: a bridge between NoSQL and relational worlds, Modifying JSON data using JSON_MODIFY() in SQL Server, DP-300 Administering Relational Database on Microsoft Azure, How to use the CROSSTAB function in PostgreSQL, Use of the RESTORE FILELISTONLY command in SQL Server, Extract scalar values from JSON data using JSON_VALUE(), SQL Server JSON functions: a bridge between NoSQL and relational worlds, How to import/export JSON data using SQL Server 2016, Different ways to SQL delete duplicate rows from a SQL Table, How to UPDATE from a SELECT statement in SQL Server, SELECT INTO TEMP TABLE statement in SQL Server, SQL Server functions for converting a String to a Date, How to backup and restore MySQL databases using the mysqldump command, SQL multiple joins for beginners with examples, SQL Server table hints WITH (NOLOCK) best practices, SQL percentage calculation examples in SQL Server, DELETE CASCADE and UPDATE CASCADE in SQL Server foreign key, SQL Server Transaction Log Backup, Truncate and Shrink Operations, Six different methods to copy tables between databases in SQL Server, How to implement error handling in SQL Server, Working with the SQL Server command line (sqlcmd), Methods to avoid the SQL divide by zero error, Query optimization techniques in SQL Server: tips and tricks, How to create and configure a linked server in SQL Server Management Studio, SQL replace: How to replace ASCII special characters in SQL Server, How to identify slow running queries in SQL Server, How to implement array-like functionality in SQL Server, SQL Server stored procedures for beginners, Database table partitioning in SQL Server, How to determine free space and file size for SQL Server databases, Using PowerShell to split a string into an array, How to install SQL Server Express edition, How to recover SQL Server data from accidental UPDATE and DELETE operations, How to quickly search for SQL database data and objects, Synchronize SQL Server databases in different remote sources, Recover SQL data from a dropped table without backups, How to restore specific table(s) from a SQL Server database backup, Recover deleted SQL data from transaction logs, How to recover SQL Server data from accidental updates without backups, Automatically compare and synchronize SQL Server data, Quickly convert SQL code to language-specific client code, How to recover a single table from a SQL Server database backup, Recover data lost due to a TRUNCATE operation without backups, How to recover SQL Server data from accidental DELETE, TRUNCATE and DROP operations, Reverting your SQL Server database back to a specific point in time, Migrate a SQL Server database to a newer version of SQL Server, How to restore a SQL Server database backup to an older version of SQL Server, It is a bridge between No-SQL and relational databases. When we split ProtocolModificationDynamicData there were 2 values which were translated into 2 rows from 1 row. To use the default settings the call is: To set the options dateStyle and idStart the call is: Notice that we only need to just pass in the options we want to set (2 in the example above), not all of them. Take a look and let us know if this post can help you, https://www.simple-talk.com/blogs/2013/03/26/sql-server-json-to-table-and-table-to-json/. Learn how your comment data is processed. With record 5 (name = nested 3), you would take the value and run it into the function: Normally the comma is the split character. We have another set of curly brackets indicating another object. It shows the drawer attribute. This will insert a new product that has an array of drawers. The columns from both versions are combined. With this JSON validation, the data is automatically validated for us. And that covers the basics of what JSON is. We can then select the data from the table again to see that it has been removed: The attribute of height is no longer in the JSON field. Run query examples. Is there a colloquial word/expression for a push that helps you to start to do something? JSON stands for JavaScript Object Notation, and its a way to format and store data. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. What is behind Duke's ear when he looks back at Paul right before applying seal to accept emperor's request to rule? Is there an ordered relationship between the ProtocolModificationDynamicData and the remaining columns, i.e. The output of this query is JSON text that's fully compliant with the OData spec. 1 is the starting position. Due to the limitation with the rounding of milliseconds before SQL Server 2008, the S2K version of fnSplitJson2 will give rounding errors. In JSON, each object is enclosed by curly brackets({}). We can use the JSON_Query() function in the AdventureWorks sample database. How can I pretty-print JSON in a shell script? Because drawer is an array, we cant use the dot notation to get the attribute like this: This will return a null value as there is no attribute called side: its part of an array. We can note that the array starts and end with a square Store info about products with a wide range of variable attributes in a denormalized model for flexibility. The JSON field can be used to store valid JSON data sent or received by your application. use one parameter instead of many parameters in stored procedures or functions. How does this help? What is the best way to deprotonate a methyl group? How can I delete using INNER JOIN with SQL Server? Here are some tips I can offer for using JSON in SQL Server. In this example the function splits the JSON array formatted string into 3 records. The set of key-value pairs for an object must be embraced in curly braces ( {}). The result has been that all of the JSON data has been displayed in a single column. Its similar to HTML or XML it represents your data in a certain format that is readable by people but designed to be readable by applications. Other characters sequences that are automatically converted are: @InputString nvarchar(max) (SS2K8) nvarchar(4000) (SS2K). location {"countryCode":"IN","countryName":"India","postalCode":"400102","administrativeArea":"Maharashtra","subAdministrativeArea":"Mumbai Suburban","locality . The following JSON object string has 5 named/value. JSON Format JSON documents are represented as a series of JSON objects that contain name-value pairs. The value of posts is an array, which we can see by the opening square bracket [. ignore the errors related to full text for this article. The application puts data in and reads data from it, and the database doesnt care about whats inside the field. Import and export JSON. Values are separated by a comma. Weapon damage assessment, or What hell have I unleashed? These NoSQL databases primarily uses JSON structured data. It starts with a $ symbol, and we specify a dot then the name of the attribute were looking for. We can run the same SELECT statement as above to see the updated value. How is "He who Remains" different from "Kang the Conqueror"? key:value pairs will not be returned as column:cell - each key:value pair will be returned in a separate rows: This will be also available in Azure SQL Database soon. Consider filtering by the primary key and other fields in the table, rather than attributes inside the JSON field. Azure Synapse Analytics. JSON is also used for storing unstructured data in log files or NoSQL databases such as Microsoft Azure Cosmos DB. You can easily transform relational to semi-structured data and vice-versa. It then validates and sets the variables using the returned table. If youre experienced with JSON, youll find the rest of the guide more useful as we go into the details of working with JSON in SQL Server. An array is an ordered collection of values. You can optionally specify a path after the type specification to reference a nested property or to reference a property by a different name. Parsing JSON data in Unicode is 5-15% faster. AdventureWorks2016_EXT. The @OffsetValue is zero-based (more on that later in this article). As you can see from the options available for fnSplitJson2, if I had to write it with a parameter for each option the code would look something like: where parameters 2 -8 are the options. As you can probably see by this statement, reading it (and writing it) is a bit tricky. The function converts this format into a T-SQL date style format. In this guide, weve looked at what JSON is, seen how to create JSON fields in SQL Server, and seen a range of ways we can work with them. For this example I will use the options setting code used within the fnSplitJson2 function. Column [source] Returns a new row for each element in the given array or map. The @LengthValue is, by default, a BIGINT data type. Weve seen that it can be slow to search by attributes inside the JSON field. We get an object or an array from the JSON. You can refer to JSON for these articles. We can use FOR JSON PATH argument to format the output in the JSON format. There is a function in SQL Server that allows you to update a field quite easily: the JSON_MODIFY function. This is an example of using the fnSplitJson2 function: I believe you will find the JSON format easy to use and very readable, and the fnSplitJson2 function a very useful tool. Using Extension Method and Class 4 ways to Convert JSON to DataTable in C# - asp.net 3.1 Select source connection for data. Defined Function 5. You can use both standard table columns and values from JSON text in the same query. The function has the capability to return the option variable's values by setting the debug option equal to 1. Connect and share knowledge within a single location that is structured and easy to search. A normalised database structure, one with tables and columns and relationships, works well for most cases. Names in JSON need to be enclosed in double quotes. raise an error in case of any invalid key or value. In the following example, the second object in the array has sub-array representing person skills. 542), We've added a "Necessary cookies only" option to the cookie consent popup. For example, in order to parse data in SQL Server 2008 and above, we use OPENJSON function which transforms a JSON array to a table. We can see the differences in the results using the JSON_QUERY function. Without append, it will replace the existing value. You can provide the content of the JSON variable by an external REST service, send it as a parameter from a client-side JavaScript framework, or load it from external files. It consists of We simply insert a record into our table as though its a text value. In the CTE query the data is split into two columns. If it was done using a normalised database, this may involve altering tables, or creating an Entity Attribute Value design, or some other method. UPDATE: With the help of Max Vernon and Andriy M we have found a fairly simple solution to this problem. However, its quite easy to get attributes and values out of this text field and display them. Create a UDF where it requires the user to pass the JSON columns which can be fetched from the data source and combined in one simple SQL statement. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. We can see that the columns have been split out and are showing separately. If removeQuotes =1 and surrounding double quotes are detected, then the surrounding double quotes are removed and the control pattern \" is replaced with a ". Note that the only difference between this input string and the input string from the previous example is the surrounding brackets instead of the surrounding braces. You get NULL value in the output if we replace the JSON_MODIFY() function with JSON_VALUE(). steps to prepare the same database. But why isnt it showing in the results? It is a bridge between No-SQL and relational databases. We will update the links as the videos are migrated to the new platform. Parse JSON text and read or modify values. Consider using the advantages of SQL Server relational database and using JSON where appropriate. Was Galileo expecting to see so many stars? One way to update JSON data is to add a new item to an existing JSON value. It can be useful to use strict if you need this for your application. Notify me of follow-up comments by email. Heres how to insert an array by just specifying it in a JSON format. JSON is a textual format so the JSON documents can be stored in NVARCHAR columns in a SQL Database. In my sample, I used a blank space as a delimiter to split column into multiple columns. While there are functions for reading from and working with the JSON field, it might be better to just store the JSON data in the field, retrieve it from your application, and process it there. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. We need to use the JSON_VALUE function to search for a particular attribute in the JSON value. OPENJSON function helps with parsing JSON text. The path expression lets us specify the attribute we want to search for. As OPENJSON returns a set of rows, we can use OPENJSON in the FROM clause with CROSS APPLY. 121 =yyyy-mm-dd hh:mi:ss.mmm(24h). GO Solution : Given below is the solution, where we need to convert the column into xml and then split it into multiple columns using delimiter. JSON stands for JavaScript Object Notation, and is a lightweight data-interchange format. We can see that the results only show records where the color attribute is brown. In this article, we are exploring JSON_QUERY() function using various examples. data. If you must create a query or report on JSON data, you can easily convert JSON data to rows and columns by calling the OPENJSON rowset function. Well use it on a JSON value, then see how to use it for our table. In this article, we will explore JSON_QUERY() functions in SQL Server to extract JSON objects and array from the So, whats the best way to work with JSON fields in SQL Server? You can copy the JSON and paste it in the JSON formatter. The fnSplitJSON2 function splits a JSON string and returns the information in a table. Our path expression would look like this: We can write the JSON_VALUE function like this: Weve added this JSON_VALUE function to our WHERE clause, and added a condition where the color is equal to brown. LEFT JOIN vs. LEFT OUTER JOIN in SQL Server. For more information, see Format query results as JSON with FOR JSON (SQL Server) and FOR Clause (Transact-SQL). It is a This means it can be treated as a single unit by other areas of the application. In the below query, we use the root as Items. Once we run this statement, we can select from our table again and see our updated value: This only works if the target element is an array, which material is. JSON documents may have sub-elements and hierarchical data that cannot be directly mapped into the standard relational columns. Starting with SQL Server 2017, significantly accelerated the parsing of scalar values from JSON. I want to update the height element value based on the side from the array list dynamically without hardcoding the array index This query will show all records, and show the color attribute as a separate column. So youve learned a bit about JSON data and why you might want to use it. It should be possible with SQL Server 2016 afaik, There is concrete question about transformation, it's not so general question as in link above. Some of the video links in this section may not work at this time. In this example the function splits an JSON object formatted string into 3 records, using the name and value columns. The other way to delete JSON data is to remove an attribute from a JSON field. SQL Server can also format query results in any format, such as OData JSON or GeoJSON. Connect and share knowledge within a single location that is structured and easy to search. This will transpose the data into columns, and specify data types, which can be useful to INSERT data. It has an id and a product name. wtov9 weather. By using SQL Server built-in functions and operators, you can do the following things with JSON text: The next sections discuss the key capabilities that SQL Server provides with its built-in JSON support. JSON data can be enclosed in curly brackets which indicate its an object. Ive used square brackets around key and value as they are reserved words. Consider denormalizing your data model with JSON fields in place of multiple child tables. JSON is also the main format for exchanging data between webpages and web servers by using AJAX calls. So, because were updating an existing row in the table, we use the UPDATE statement and this function. If there is a further split of 1 values into 2, then there are 4 rows, and so on. Check Constraints are inspected whenever data is added or updated in the table. The JSON_VALUE function takes two parameters: Lets say we want to display the color attribute in a separate column in our results. JSON text is stored in VARCHAR or NVARCHAR columns and is indexed as plain text. We can use strict mode for getting the error message. pass a data string into stored procedures from a website using AJAX calls. A quick example: SELECT * FROM STRING_SPLIT('a,b,cd', ','); /* result: value -------- a b cd */. 3.3. 542), We've added a "Necessary cookies only" option to the cookie consent popup. JSON Data. Each nested key name can appear just once per data object type instance. Hi! Create indexes on JSON properties and full-text indexes. If a JSON field was used for this, it would be much easier to add and maintain these custom attributes. The good thing with this is that any application can easily read this field and work with it how they want (display it, filter it, and so on). { "Width": 800, "Height": 600, "Title": "JSON split function", "Thumbnail": {"Url": "http://www.example.com/image/SS2008jsontn", "Height": 50, "Width": "95" }, "IDs": [1, 33, 77] }, {"Url": "http://www.example.com/image/SS2008jsontn", "Height": 50, "Width": "95" }. personVist4 | 01:00AM The json_doc parameter is the JSON value that will be translated. As we already know, JSON uses a To retrieve the first record, we use, Similarly, we can access the second record using the. We can retrieve the whole JSON document by removing the second argument. There are two DELETE operations you can do when working with JSON fields: Deleting a row from your table is done in the same way as regular SQL. Let us have a JSON placed in an external file and its contents are Select * FROM OPENJSON (@JSON) If you must filter or aggregate JSON data for reporting purposes, you can use OPENJSON to transform JSON to relational format. It caught the eyes of a few colleagues, including Dave Ballantyne, who wrote about the main features - but was kind enough to offer me first right of . The splitChar option allows you to specify a different character to split on. The id values are negative offset from the idStart value. It becomes necessary for SQL database administrators as well to understand JSON and use SQL Server function in conjunction with JSON. bracket. Converting Azure Synapse Analytics data to JSON or exporting JSON is not supported. JSON data is written as name/value pairs. Why was the nose gear of Concorde located so far aft? Hi, The second half of this article will utilize the Eloquent ORM with Laravel to communicate with the database. To learn more about your options for storing, indexing, and optimizing JSON data in SQL Server, see the following articles: You can format information that's stored in files as standard JSON or line-delimited JSON. This is optional: its just done to make it more readable. It will generate a relational table with its contents from the JSON string. What is the ideal amount of fat and carbs one should ingest for building muscle? What does a search warrant actually look like? We can see that the step is still called Table Scan. A name/value pair is two values enclosed in quotes. Load, query, and analyze log data stored as JSON files with all the power of the Transact-SQL language. One example may be where a user can add custom attributes. Why does RSASSA-PSS rely on full collision resistance whereas RSA-PSS only relies on target collision resistance? Instead of writing code or including a library to convert tabular query results and then serialize objects to JSON format, you can use FOR JSON to delegate the JSON formatting to SQL Server. Or we can just pass it to the ISJSON function. If you want to replace a value of an attribute inside a JSON field with another value, you can also use the JSON_MODIFY function. When using JSON, you can significantly reduce the load on the server CPU in comparison with XML. $.Employees[1].Address. JSON functions, first introduced in SQL Server 2016, enable you to combine NoSQL and relational concepts in the same database. The dateStyle option is used to change the default style. JSON is a viable option for transferring data between systems. These two objects are posts and they are contained in an array. This means for the attribute of username, the value is sstorm. I am the creator of one of the biggest free online collections of articles on a single topic, with his 50-part series on SQL Server Always On Availability Groups. zero-based indexing process, and we can specify the second argument $.Employees[1]. I can recommend JsonSelect and json4sql if you want to use existing CLR solutions. update test set desk = json_modify(desk, {{{ $.Desk[XX].height = 10cm }}} where {{{$.Desk[XX].side =left}}}, Sample Data The offset in the input string that the element was found. [DataContract ] public class Data { [DataMember (Name = "name" )] public string Name { get; set; } [DataMember] public string Custnumber { get; set; } } Expand . However, we can use a number to reference the position in the array. The path is $.width as its a width attribute at the top level (not within another attribute). For example: The function call is now simpler, with only two required parameters. In the following example, we have a JSON string that contains key-value pairs, a JSON array and JSON object. sql. We explored JSON_VALUE() and JSON_MODIFY() functions in my previous articles. There are four basic methods in this library as follows: json.dump - This method is used to serialize a python object from the memory into a JSON formatted stream that can be written to a file json.dumps - This is used to serialize the python objects in the memory to a string that is in the JSON format. SQL Server offers an append keyword as part of the JSON_MODIFY function. A new item to an existing row in the table, we use the options setting code used within fnSplitJson2! And using JSON, each object is enclosed by curly brackets ( { } ) how! And relationships, works well for most cases bit tricky we provide JSON. Because were updating an existing row in the output, as shown below %! To rule in SQL Server ) and for clause ( Transact-SQL ) the option variable values. The root as Items technologists share private knowledge with coworkers, Reach developers & technologists worldwide the. Json_Query function default, a JSON field use OPENJSON in the given array or map see updated... Give rounding errors due to the cookie consent popup the idStart value second half this. Analytics data to JSON or exporting JSON is also used for storing unstructured in. Json with for JSON path argument to format the output in the output in the,... The step is still called table Scan ( 24h ) it on a JSON value that will be.! Work at this time the information in a separate column in our.! Puts data in Unicode is 5-15 % faster symbol, and is a function SQL. Json_Modify ( ) function using various examples not within another attribute ) symbol, and so on setting debug... Once per data object type instance has an array search for a push that helps you to specify path. This means for the attribute split json data in sql server column username, the second argument will be translated same query for us such Microsoft... There a colloquial word/expression for a push that helps you to specify a then... Enable you to combine NoSQL and relational databases would be much easier to add new. Split out and are showing separately to make it more readable attributes and out. Combine relational and NoSQL concepts to ensure it is a function in the same SELECT statement above... Sql database lets you combine relational and NoSQL concepts you combine relational and NoSQL concepts DataTable in #! Database administrators as well to understand JSON and paste it in a separate column in our results that! Data is split into two columns using INNER JOIN with SQL Server ) and for (... Objects that contain name-value pairs does RSASSA-PSS rely on full collision resistance to Convert JSON to DataTable C... The video links in this example the function splits an JSON object formatted into... A new row for each element in the CTE query the data columns. Can offer for using JSON in a shell script JSON path argument to format and store data ive square... Connection for data the variables using the returned table to do something with. Most cases, and is a this means it can be used to the! Pairs for an object or an array by just specifying it in the from clause with CROSS.. Delete all UUID from fstab but not the UUID of boot filesystem and values out of this text field a. Whenever data is to remove an attribute from a JSON string that contains key-value pairs a... Can add custom attributes update a field quite easily: the JSON_MODIFY function retrieves. A width attribute at the top level ( not within another attribute ) the array. Left OUTER JOIN in SQL Server 2016, enable you to start to do something VARCHAR or NVARCHAR in! Than attributes inside split json data in sql server column JSON formatter combine NoSQL and relational concepts in the array... Connect and share knowledge within a single location that is structured and easy to get attributes values. Stored in NVARCHAR columns in a separate column in our results the json_doc parameter the. Privacy policy and cookie policy as its a text value use SQL that. Also the main format for exchanging data between systems JSON format of this will. Not supported your JSON data is added or updated in the CTE query the data columns... Different name agree to our terms of service, privacy policy and cookie policy the nose gear of located! Of what JSON is a viable option for transferring data between systems setting code used the. Use the JSON_VALUE function to search, i.e parameter instead of many parameters in stored procedures or functions your! $.width as its a way to update JSON data has been displayed in a SQL database administrators well... Such as OData JSON or GeoJSON and hierarchical data that can not be mapped! Its an object or an array from the idStart value the remaining columns, and specify data,!, enable you to update JSON data is split into two columns display.... Power of the JSON_MODIFY ( ) is to remove an attribute from a JSON field can be used store! Section may not work at this time weve seen that it can be enclosed double... Json validation, the second object in the below query, we can use OPENJSON in the JSON formatter want! Store valid JSON data sent or received by your application see by opening... Values from JSON text that 's fully compliant with the help of Max and! Rely on full collision resistance use the root as Items us know if post... Is 5-15 % faster: with the rounding of milliseconds before SQL Server field and display them or received your... Can recommend JsonSelect and json4sql if you need this for your application for each element in JSON. Care about whats inside the field with JSON_VALUE ( ) function in conjunction JSON... By this statement, reading it ( and writing it ) is a bridge between No-SQL and relational in... Why does RSASSA-PSS rely on full collision resistance whereas RSA-PSS only relies target... Will transpose the data is split into two columns a text value 2017, significantly accelerated the of., i.e same database getting the error message option to the ISJSON function well for most.! Filtering by the primary key and other fields in place of multiple child tables a methyl group is... A fairly simple solution to this problem so the JSON string search for store data within another attribute.! Within another attribute ) relational and NoSQL concepts where developers & technologists worldwide pretty-print JSON a! That 's fully compliant with the OData spec this will insert a new row for each element in from! Part of the video links in this example the function has the capability to return the option variable 's by. Of we simply insert a new row for each element in the below query, we! Child tables the color, material, and height into the standard columns... And JSON object formatted string into 3 records hell have I unleashed is 5-15 % faster Paul right applying. Heres how to delete JSON data is to remove an attribute from website... Of key-value pairs, a JSON field only relies on target collision?. Add and maintain these custom attributes in stored procedures from a website using AJAX calls are. By other areas of the JSON format 's ear when he looks back at right... For clause ( Transact-SQL ) all of the application a relational table with its contents the! Eloquent ORM with Laravel to communicate with the rounding of milliseconds before SQL Server that you! Function to search must be embraced in curly brackets indicating another object JSON and paste it in a.. The AdventureWorks sample database the CTE query the data is added or updated in the JSON the query. Been split out and are showing separately by just specifying it in the from clause with CROSS APPLY color in! In an array with SQL Server offers an append keyword as part of the links! To specify a path expression lets us specify the attribute were looking for object type.. In the following example, lets say we want to SELECT all products the. Into our table as though its a text value significantly reduce the on. Within the fnSplitJson2 function splits an JSON object a $ symbol, and height into the SELECT clause key value! Indexing process, and height into the SELECT clause by default, a JSON value, then how! In a JSON value ingest for building muscle are posts and they are reserved words attribute at top... The OPENJSON function is quite useful if you need this for your application JOIN with SQL Server ) JSON_MODIFY!, i.e this format into a T-SQL date style format variables using the name and value as are. Conjunction with JSON fields in place of multiple child tables scalar values from JSON Reach &. The update statement and this function in an array from the idStart value is still table. Be useful to insert data column into multiple columns its an object to an... Used within the fnSplitJson2 function for most cases must be embraced in curly braces ( { )... =Yyyy-Mm-Dd hh: mi: ss.mmm ( 24h ) to DataTable in C # - 3.1. Are reserved words existing JSON value, then see how to insert data DB... Are reserved words of curly brackets indicating another object it is a lightweight data-interchange format then the name the. Strict if you want to use the update statement and this function ''. Is enclosed by curly brackets indicating another object, such as OData JSON or JSON! That the step is still called table Scan: ss.mmm ( 24h ) to accept emperor request... You, split json data in sql server column: //www.simple-talk.com/blogs/2013/03/26/sql-server-json-to-table-and-table-to-json/ or value though its a way to format and store data this... Relational table with its contents from the JSON field and Class 4 ways Convert... Json text is stored in NVARCHAR columns in a single column contains key-value pairs, a JSON string returns.