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selecting rows with duplicated values

Discuss selecting rows with duplicated values in the Database Management forum on Dev Shed.
selecting rows with duplicated values Database Management forum discussing non-database specific SQL. Structured Query Language was designed to be a robust and standardized language for manipulating relational databases.

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  #1  
Old July 31st, 2003, 06:45 AM
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shafan shafan is offline
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selecting rows with duplicated values [RESOLVED]
Hi,
I'm trying to select all the Employees who's Employee ID already exist (duplicated Employee IDs) from my Employees table.
I need help with the SQL syntax. Anyone?

Thanx!
Last edited by shafan : July 31st, 2003 at 08:17 AM.
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  #2  
Old July 31st, 2003, 08:06 AM
swampBoogie swampBoogie is offline
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Code:
select * from employees
where id in (select id
from employees
group by id
having count(id) > 1)
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Old July 31st, 2003, 08:20 AM
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works like a dream!
thanx
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