spe*_*peg 3 sql sql-server sql-server-2005
我有一张桌子:
term_id course_id
1 592
1 603
2 592
2 603
2 700
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如何创建查询以选择术语1和2中的所有course_ids?
SELECT course_id
FROM T
WHERE term_id=1
INTERSECT
SELECT course_id
FROM T
WHERE term_id=2
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要么
SELECT course_id
FROM T
WHERE term_id IN (1,2)
GROUP BY course_id
HAVING COUNT(DISTINCT term_id) = 2
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