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Equivalent JOIN query for this sub-query.

 
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ramsri

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Joined: 18 Oct 2008
Posts: 380
Location: India

PostPosted: Fri Feb 27, 2009 2:56 pm    Post subject: Equivalent JOIN query for this sub-query.
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Hi,

I need an equivalent JOIN query for this below given sub-query.

Code:

SELECT ORDER_KEY, ORDER_NUM FROM DB01.CUST
 WHERE NOT EXISTS (SELECT * FROM DB01.CUST_A
                    WHERE A.ORDER_KEY = B.ORDER_KEY)



Please help. Thanks.
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ashimer

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Joined: 13 Feb 2004
Posts: 551
Location: Bangalore

PostPosted: Fri Feb 27, 2009 3:09 pm    Post subject:
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You are checking for an order_key from CUST which is not present in CUST_A .. you can use NOT EXISTS or NOT IN but a join wont be possible ....
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krithikaj

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Joined: 10 Aug 2008
Posts: 45
Location: India

PostPosted: Fri Feb 27, 2009 4:06 pm    Post subject: Re: Equivalent JOIN query for this sub-query.
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Hi,

Try this SQL. Use the matching column names instead of selecting all the columns in the inner query.

SELECT ORDER_KEY, ORDER_NUM
FROM DB01.CUST
WHERE NOT EXISTS
(SELECT ORDER_KEY, ORDER_NUM
FROM DB01.CUST_A
WHERE A.ORDER_KEY = B.ORDER_KEY)

Thanks
K J
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