How to assign an exec result to a sql variable? - sql

Question

How do you assign the result of an exec call to a variable in SQL? I have a stored proc called up_GetBusinessDay, which returns a single date.
Can you do something like this:
exec #PreviousBusinessDay = dbo.up_GetBusinessDay #Date, -1

Answer 1

I always use the return value to pass back error status. If you need to pass back one value I'd use an output parameter.
sample stored procedure, with an OUTPUT parameter:
CREATE PROCEDURE YourStoredProcedure
(
#Param1 int
,#Param2 varchar(5)
,#Param3 datetime OUTPUT
)
AS
IF ISNULL(#Param1,0)>5
BEGIN
SET #Param3=GETDATE()
END
ELSE
BEGIN
SET #Param3='1/1/2010'
END
RETURN 0
GO
call to the stored procedure, with an OUTPUT parameter:
DECLARE #OutputParameter datetime
,#ReturnValue int
EXEC #ReturnValue=YourStoredProcedure 1,null, #OutputParameter OUTPUT
PRINT #ReturnValue
PRINT CONVERT(char(23),#OutputParameter ,121)
OUTPUT:
0
2010-01-01 00:00:00.000

Answer 2

This will work if you wish to simply return an integer:
DECLARE #ResultForPos INT
EXEC #ResultForPos = storedprocedureName 'InputParameter'
SELECT #ResultForPos

Answer 3

declare #EventId int
CREATE TABLE #EventId (EventId int)
insert into #EventId exec rptInputEventId
set #EventId = (select * from #EventId)
drop table #EventId

Answer 4

From the documentation (assuming that you use SQL-Server):
USE AdventureWorks;
GO
DECLARE #returnstatus nvarchar(15);
SET #returnstatus = NULL;
EXEC #returnstatus = dbo.ufnGetSalesOrderStatusText #Status = 2;
PRINT #returnstatus;
GO
So yes, it should work that way.

Answer 5

I had the same question. While there are good answers here I decided to create a table-valued function. With a table (or scalar) valued function you don't have to change your stored proc. I simply did a select from the table-valued function. Note that the parameter (MyParameter is optional).
CREATE FUNCTION [dbo].[MyDateFunction]
(#MyParameter varchar(max))
RETURNS TABLE
AS
RETURN
(
--- Query your table or view or whatever and select the results.
SELECT DateValue FROM MyTable WHERE ID = #MyParameter;
)
To assign to your variable you simply can do something like:
Declare #MyDate datetime;
SET #MyDate = (SELECT DateValue FROM MyDateFunction(#MyParameter));
You can also use a scalar valued function:
CREATE FUNCTION TestDateFunction()
RETURNS datetime
BEGIN
RETURN (SELECT GetDate());
END
Then you can simply do
Declare #MyDate datetime;
SET #MyDate = (Select dbo.TestDateFunction());
SELECT #MyDate;

Answer 6

Here is solution for dynamic queries.
For example if you have more tables with different suffix:
dbo.SOMETHINGTABLE_ONE, dbo.SOMETHINGTABLE_TWO
Code:
DECLARE #INDEX AS NVARCHAR(20)
DECLARE #CheckVALUE AS NVARCHAR(max) = 'SELECT COUNT(SOMETHING) FROM
dbo.SOMETHINGTABLE_'+#INDEX+''
DECLARE #tempTable Table (TempVALUE int)
DECLARE #RESULTVAL INT
INSERT INTO #tempTable
EXEC sp_executesql #CheckVALUE
SET #RESULTVAL = (SELECT * FROM #tempTable)
DELETE #tempTable
SELECT #RESULTVAL

Answer 7

You can use a Table Variable for that
Code:
DECLARE #PreviousBusinessDay DATETIME
DECLARE #Temp TABLE(BusinessDay DATETIME)
INSERT INTO #Temp EXEC dbo.up_GetBusinessDay #Date, -1
SET #PreviousBusinessDay = (SELECT * FROM #Temp)
SELECT #PreviousBusinessDay
https://www.sqlservertutorial.net/sql-server-user-defined-functions/sql-server-table-variables/