Explain the use of tables option in exp command.
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hi friends, I have a table A col as status|NUM and value as open |1 open |2 close |3 close |3 the O/P should be open|close 1 |3 2 |4
21. Using a set operator, display the client number of all clients who have ever placed an order and whose whose name does not contain the string Sm.
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