What is the purpose of the primary key?
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What does over partition by mean in sql?
how to eliminate null values in a column i.e table vlaues 1 2 3 NULL 3 4 1 5 NULL i want output like this 1 2 3 3 4 1 5 i dnt want to use nvl is null and i dnt want replace the NULL value with any value i.e nvl(col,o);
wirte a query to remove null? following table are col1 col2 col3 dinesh null null null suresh null null null prakesh i want the output like col1 col2 col3 dinesh suresh prkaesh
What are tables and fields?
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Why plvtab is considered as the easiest way to access the pl/sql table?
What is triggering circuit?
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Enlist the advantages of sql.
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