![]() Lets see what happens, if you do not use ROOT option with FOR JSON AUTO CLAUSE. INSERT INTO dbo.StudentInfo (StudName, StudCode, StudAddress)Īs you can see, now you have one null value in studAddress column. To display null values in JSON result set, you need to add INCLUDE_NULL_VALUES property in the FOR JSON clause otherwise in case of null values the name-value pair will be removed from the JSON output To demonstrate this, Lets add one more sample record in table containing a null values. StudCode, StudAddress įOR JSON AUTO CLAUSE Using dot “.” symbol with FOR JSON AUTO clause in the column aliases, does not affect in the generated JSON. SELECT StudId, StudName, StudCode, StudAddress FROM dbo.StudentInfoįOR JSON AUTO, ROOT( 'StudentInformation')įOR JSON PATH CLAUSE using dot “.” symbol with FOR JSON PATH clause in the column aliases, you can name the each object in the resulting JSON array. SELECT StudId, StudName, StudCode, StudAddress FROM dbo.StudentInfoįOR JSON PATH, ROOT( 'StudentInformation')įollowing statement uses the ROOT option with For JSON AUTO clause and creates a studentInformation JSON wrapper object around the JSON ouptut. For JSON PATH with ROOT Optionįollowing statement uses the ROOT option with For JSON PATH clause and creates a studentInformation JSON wrapper object around the JSON output. Using the ROOT option in the FOR JSON clause can be generated a wrapper object around the generated JSON output. SELECT StudId, StudName, StudCode, StudAddress FROM dbo.StudentInfo Using FOR JSON AUTO clause to generate JSON from table StudentInfo. You can provide specific columns as well. In select statement it is not mandatory to pass all table column’s name. SELECT StudId, StudName, StudCode, StudAddress FROM dbo.StudentInfoĪs you can see, It converts table output in Json format. Lets generate JSON from table using FOR JSON PATH clauseįollowing statement uses FOR JSON Path clause and generates JSON from table StudentInfo. Use FOR JSON PATH or add a FROM clause with a table name.” SELECT 'Microsoft SQL Server 2016' as DatabaseName,Īs you can see, It gives an error syaing “FOR JSON AUTO requires at least one table for generating JSON objects. Lets try to generate JSON without table, just gives hard-coded values. It requires at least one table to generate JSON when using FOR JSON AUTO clause. Using FOR JSON AUTO clause, you can not generate JSON without table. SELECT 'Microsoft SQL Server 2016' as DatabaseName, Using FOR JSON PATH clause you can generate JSON, in case if you do not have any table and passing hard-coded values as shown below. Lets understand the use of FOR JSON PATH and FOR JSON AUTO clause FOR JSON PATH Clause ( 'Rozer Hanery', 'D78JKHI', 'Condominum 3A, 3rd floor') GO INSERT INTO dbo.StudentInfo (StudName, StudCode, StudAddress) Lets look at an example using FOR JSON clause in SQL Server.įirst we create a sample table named as studentInfo and Insert some sample records in table. ![]() FOR JSON AUTO is used to format the JSON output automatically based on the structure of the SELECT statement.FOR JSON PATH gives the full control over the format of the JSON output also can create wrapper objects and nest complex properties.Using FOR JSON clause, you can specify the structure of the JSON output explicitly with the help of PATH and AUTO as given below. ![]() It was introduced in SQL Server 2016 version. SQL Server FOR JSON Clause is used to format query result to JSON format or export data from SQL Server as JSON format. ![]()
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