Question

I have the following SQL query:

Declare @Total_SysDown as int,
        @Login_SysDown as int



Set @Total_SysDown =    (SELECT SCHED_SYS_DOWN FROM AGT_SC AS S)
Set @Login_SysDown =    (SELECT SYS_DOWN FROM AGT_AC AS A)


Insert Into dbo.DATA(DATE,ID,LNAME,FNAME,Total_SysDown,Login_SysDown)
Select C.DATE,C.ID,E.Last_Name,E.First_Name,@Total_SysDown @Login_SysDown
From dbo.AGT as C Inner Join dbo.EMP as E ON C.ID = E.ID 
Group by C.ID,C.DATE,E.Last_Name,E.First_Name

This or just the variables with the Select statement gives me an error of Subquery returned than 1 value. From what I understand, this means that I should be inserting one record at a time, but I am unsure how to do this. Is there a while statement I should be putting in, or are my variables actually hindering me in the first place?

Answer 1

At least one of the queries:

(SELECT SCHED_SYS_DOWN FROM AGT_SC AS S)
(SELECT SYS_DOWN FROM AGT_AC AS A)

returns more than 1 row, so you cannot assign it to a scalar variable.

As a temporary solution you can do SELECT TOP 1 to make sure each query returns at most one row.