SQl to list rows in not in another table

Posted by SmartestVEGA on Stack Overflow See other posts from Stack Overflow or by SmartestVEGA
Published on 2010-03-22T14:08:50Z Indexed on 2010/03/22 14:11 UTC
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t-sql

I have the following query which have 1000 rows

select staffdiscountstartdate,datediff(day,groupstartdate,staffdiscountstartdate),EmployeeID from tblEmployees where GroupStartDate < '20100301' and StaffDiscountStartDate > '20100301' and datediff(day,groupstartdate,staffdiscountstartdate)>1 order by staffdiscountstartdate desc

i have the following query which have 400 rows: ie the employees in tblemployees and in tblcards

select a.employeeid,b.employeeid from tblEmployees a,tblCards b where GroupStartDate < '20100301' and StaffDiscountStartDate > '20100301' and datediff(day,groupstartdate,staffdiscountstartdate)>1 and a.employeeid=b.employeeid

How to list the employees which is there in tblemployees and not in tblcards?

ie is 1000-400 = 600 rows ???

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