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Operator '<=' facing multi-value data

I have the following code:

select * from Request_History
where
      Stage_No <= (select Stage_No from Work_Flow where Role_ID='7')

The question is: this (select Stage_No from Work_Flow where Role_ID='7') sometimes return more than one value, then what operator other than the '<=' shall I use in this case?
0
alfardan
Asked:
alfardan
2 Solutions
 
Jim P.Commented:
Try this:
select * 
from Request_History
where Stage_No IN (select Stage_No 
                   from Work_Flow 
                   where Role_ID='7')

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0
 
Terry WoodsIT GuruCommented:
Or one of these, depending on the result you want when there's more than one row returned by the subquery:
select * from Request_History
where Stage_No <= (select min(Stage_No) from Work_Flow where Role_ID='7')
 
select * from Request_History
where Stage_No <= (select max(Stage_No) from Work_Flow where Role_ID='7')

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0
 
lwadwellCommented:
Hi alfardan,

perhaps you should do

lwadwell
select * from Request_History
where
      Stage_No <= (select max(Stage_No) from Work_Flow where Role_ID='7')

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0
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