Question

我有一个像下面这样的表，其中记录基本上是两对（相同的ID1和ID2）但注意和状态不同（有时）。我需要选择所有同时具有等于＆＃34;准备好QC＆＃34;字段的记录。并且字段Status等于1，并且具有字段Note的记录等于＆＃34;准备编目＆＃34;状态为0。

ID1,   ID2,      Note,                      Status
3,     22,       Ready for QC,                1
3,     22,       Ready for Cataloging,        0
36,    22,       Ready for QC,                1
36,    22,       Ready for Cataloging,        1
63,    22,       Ready for QC,                1
63,    22,       Ready for Cataloging,        0
67,    67,       Ready for QC,                0
67,    67,       Ready for Cataloging,        0

有什么建议吗？谢谢。乔瓦尼

Answer 1

我认为你想要这两个条件存在的所有记录的ID1和ID2。

它假定每个ID1，ID2，Note，Status的唯一性（意味着表中不能有两个相同的记录）

SELECT ID1, ID2, count(*) cnt
FROM Table
WHERE (Note = "Ready to QC" and status = 1) 
    OR(note = "Ready for Cataloging" and Status 0)
GROUP BY ID1, ID2
HAVING COUNT(*) = 2

Answer 2

这个更长但是重复：

SELECT t1.id1, t1.id2, t1.note, t1.status
FROM
(SELECT *
 FROM t
 WHERE note = 'Ready for QC'
 AND status = 1) t1
INNER JOIN
(SELECT *
 FROM t
 WHERE note = 'Ready for Cataloging'
 AND status = 0) t2
ON t1.id1 = t2.id1
AND t1.id2 = t2.id2

sql查询记录对两个

2 个答案: