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Mit csinál az alábbi utasítás? UPDATE emp_copy2_ec SET (emp_no, e_name) =(SELECT...

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Mit csinál az alábbi utasítás?

UPDATE emp_copy2_ec SET (emp_no, e_name) =(SELECT emp_no, e_name FROM emp e WHERE e.emp_no=ec.emp_no) WHERE e_name LIKE ’I%’;

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