How to Export Table Data to JSON Format in SQL Server

Ahmed S — Fri, 10 Feb 2023 16:49:46 +0000

In this article we will learn How to Export Table Data to JSON Format in SQL Server. SQL Server provides multiple ways to export data from a table into JSON format. Here’s a step by step procedure.

Create a sample data table

CREATE TABLE Employee(
	Id int IDENTITY(1,1) NOT NULL,
	FirstName nvarchar(100) NOT NULL,
	LastName nvarchar(100) NOT NULL,
	designation nvarchar(50) NOT NULL,
	Title nvarchar(100) NOT NULL,
	Email nvarchar(25) NOT NULL,
	Role  nvarchar(15) NOT NULL,
	Password nvarchar(15) NOT NULL
	);

2. Insert sample data into the table Employee

INSERT INTO [dbo].[Employee]
           ([FirstName]
           ,[LastName]
           ,[designation]
           ,[Title]
           ,[Email]
           ,[Role]
           ,[Password])
     VALUES
           ('Mick','Fleming','Software Developer','Mr','Mick@example.com','Admin','123Admin'),
		   ('Stuart','Fleming','Software Developer','Mr','Stuart@example.com','Admin','123Admin');

FOR JSON Clause

For JSON Clause in a SELECT Statement to convert the data from a table into JSON format

SELECT * FROM EMPLOYEE FOR JSON AUTO

Result

[{"Id":5,"FirstName":"Mick","LastName":"Fleming","designation":"Software Developer","Title":"Mr","Email":"Mick@example.com","Role":"Admin","Password":"123Admin"},{"Id":6,"FirstName":"Stuart","LastName":"Fleming","designation":"Software Developer","Title":"Mr","Email":"Stuart@example.com","Role":"Admin","Password":"123Admin"}]

FOR JSON PATH

To control over the format of the JSON output, use FOR JSON PATH.

SELECT * FROM EMPLOYEE FOR JSON PATH, Root('EmployeeList')

{"EmployeeList":[{"Id":5,"FirstName":"Mick","LastName":"Fleming","designation":"Software Developer","Title":"Mr","Email":"Mick@example.com","Role":"Admin","Password":"123Admin"},{"Id":6,"FirstName":"Stuart","LastName":"Fleming","designation":"Software Developer","Title":"Mr","Email":"Stuart@example.com","Role":"Admin","Password":"123Admin"}]}

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Subquery as column in Oracle SELECT Statements

Ahmed S — Sat, 16 Mar 2013 11:09:00 +0000

This query I used aggregate functions with sub-queries

SELECT

(SELECT MAX(salary) FROM employees) AS Highest,

(SELECT MIN(salary) FROM employees) AS Lowest,

(SELECT COUNT(*) FROM employees) AS Employees,

(SELECT SUM(salary) FROM employees) AS Total
FROM dual

Let us look at this with sub-queries at both the column level

and the CASE level. The following is the query:

SELECT

Employee_id, First_Name,

Salary AS salary,

ROUND((salary -(SELECT AVG(salary) FROM employees)),2) AS

avgcompare,

CASE

WHEN salary >= (SELECT AVG(salary) FROM employees) THEN

‘HIGH’

ELSE ‘LOW’

END AS paying
FROM employees

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How to Export Table Data to JSON Format in SQL Server

FOR JSON Clause

FOR JSON PATH

Subquery as column in Oracle SELECT Statements