How to run sql statements with oracle sql developer?
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How write primary and foreign key relationship between two tables without using constraints? u can use any of procedure/function/trigger and any sql?
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i have table T!. A B C D NULL 1 2 3 4 NULL 5 6 7 8 NULL 9 10 11 12 NULL. I WANT COUNT OF NULL VALUES IN TABLE. WRITE A QUERY.
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