27 lines
416 B
Plaintext
27 lines
416 B
Plaintext
-- UNION
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select emp_id as person_id
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from employee
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union
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select cust_id as person_id
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from customer;
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-- UNION ALL
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select emp_id as person_id
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from employee
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union all
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select cust_id as person_id
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from customer;
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-- INTERSECT
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select emp_id as person_id
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from employee
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intersect
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select cust_id as person_id
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from customer;
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-- EXCEPT
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select emp_id as person_id
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from employee
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except
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select cust_id as person_id
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from customer; |