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which join to use?

trupti nigam
Ranch Hand

Joined: Jun 21, 2001
Posts: 613
Hello All,

I have below conditions:
I need to join 3 tables b,c,d where and b.id_nbr = c.id_nbr and and b.id_nbr=d.id_nbr and d.state !=1 and
b.flag = 'some_value' and = ? and c.roll_nbr = ?

the row will always be there in tables b and c ,but it's not necessary that the row will be there in table d. Even in that case the query should retrieve the row from tables b,c and do not apply d.state !=1 condition.

Which type of join needs to be used in above case?

Jeanne Boyarsky
author & internet detective

Joined: May 26, 2003
Posts: 31668

You can use a subquery that checks for the state being equal to one. Then check that nothing exists in the subquery.

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subject: which join to use?