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/*16. Write a query to find the salesmen who have multiple customers.*/
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SELECT *
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FROM salesman
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WHERE salesman_id IN (
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SELECT DISTINCT salesman_id
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FROM customer a
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WHERE EXISTS (
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SELECT *
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FROM customer b
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WHERE b.salesman_id=a.salesman_id
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AND b.cust_name<>a.cust_name)); |