RETURN is used to exit the current Transact-SQL batch, query, or stored procedure immediately. : Return « Transact SQL « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Transact SQL » Return 
20. 22. 1. RETURN is used to exit the current Transact-SQL batch, query, or stored procedure immediately.
RETURN does not execute any code in the batch/query/procedure scope that follows after it.
This example demonstrates how to use RETURN to unconditionally stop a query:
8>
9CREATE TABLE employee(
10>    id          INTEGER NOT NULL PRIMARY KEY,
11>    first_name  VARCHAR(10),
12>    last_name   VARCHAR(10),
13>    salary      DECIMAL(10,2),
14>    start_Date  DATETIME,
15>    region      VARCHAR(10),
16>    city        VARCHAR(20),
17>    managerid   INTEGER
18);
19> GO
1INSERT INTO employee VALUES (1'Jason' ,  'Martin', 5890,'2005-03-22','North','Vancouver',3);
2> GO

(rows affected)
1INSERT INTO employee VALUES (2'Alison',  'Mathews',4789,'2003-07-21','South','Utown',4);
2> GO

(rows affected)
1INSERT INTO employee VALUES (3'James' ,  'Smith',  6678,'2001-12-01','North','Paris',5);
2> GO

(rows affected)
1INSERT INTO employee VALUES (4'Celia' ,  'Rice',   5567,'2006-03-03','South','London',6);
2> GO

(rows affected)
1INSERT INTO employee VALUES (5'Robert',  'Black',  4467,'2004-07-02','East','Newton',7);
2> GO

(rows affected)
1INSERT INTO employee VALUES (6'Linda' ,  'Green' , 6456,'2002-05-19','East','Calgary',8);
2> GO

(rows affected)
1INSERT INTO employee VALUES (7'David' ,  'Larry',  5345,'2008-03-18','West','New York',9);
2> GO

(rows affected)
1INSERT INTO employee VALUES (8'James' ,  'Cat',    4234,'2007-07-17','West','Regina',9);
2> GO

(rows affected)
1INSERT INTO employee VALUES (9'Joan'  ,  'Act',    6123,'2001-04-16','North','Toronto',10);
2> GO

(rows affected)
1>
2select from employee;
3> GO
id          first_name last_name  salary       start_Date              region     city                 managerid
----------- ---------- ---------- ------------ ----------------------- ---------- -------------------- -----------
          Jason      Martin          5890.00 2005-03-22 00:00:00.000 North      Vancouver                      3
          Alison     Mathews         4789.00 2003-07-21 00:00:00.000 South      Utown                          4
          James      Smith           6678.00 2001-12-01 00:00:00.000 North      Paris                          5
          Celia      Rice            5567.00 2006-03-03 00:00:00.000 South      London                         6
          Robert     Black           4467.00 2004-07-02 00:00:00.000 East       Newton                         7
          Linda      Green           6456.00 2002-05-19 00:00:00.000 East       Calgary                        8
          David      Larry           5345.00 2008-03-18 00:00:00.000 West       New York                       9
          James      Cat             4234.00 2007-07-17 00:00:00.000 West       Regina                         9
          Joan       Act             6123.00 2001-04-16 00:00:00.000 North      Toronto                       10

(rows affected)
1>
2>
3> IF NOT EXISTS
4(SELECT ID FROM Employee)
5BEGIN
6>    RETURN
7END
8> GO
1>
2>
3> drop table employee;
4> GO
20. 22. Return
20. 22. 1. RETURN is used to exit the current Transact-SQL batch, query, or stored procedure immediately.
20. 22. 2. RETURN also allows for an optional integer expression:
20. 22. 3. How to Use RETURN
20. 22. 4. Return statement
20. 22. 5. Return a table from a function
20. 22. 6. RETURNS a TABLE with structure
20. 22. 7. Assign returned value from a function to a declared variable
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