과목 구분 없음9급 지방직 공무원 서울시 컴퓨터일반 · 2016년06월25일 · 3/20
3.다음 중 유효한 SQL 문장이 아닌 것은?
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SELECT * FROM Lawyers WHERE firmName LIKE '% and %';
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SELECT firmLoc, COUNT(*) FROM Firms WHERE employees < 100;
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SELECT COUNT(*) FROM Firms WHERE employees < 100;
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SELECT firmLoc, SUM(employees) FROM Firms GROUP BY firmLoc WHERE SUM(employees) < 100;정답