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有了这个请求:SELECT DISTINCT线
SELECT *
FROM
(SELECT DISTINCT
ROW_NUMBER() OVER (ORDER BY test2.A1 ASC) AS line,
test1.A1, test1.A2, test2.A1
FROM
TB_TEST1 test1
JOIN
TB_TEST2 test2 ON test2.A3 != 'test' AND test2.A4 = test1.A4
WHERE
test1.A3 != 'test') AS sub
WHERE
line BETWEEN 1 AND 50
我得到:
1 a 1 AAA
2 a 1 BBB
3 b 7 AAA
4 b 7 BBB
5 c 11 AAA
6 c 12 BBB
但我想只有在第二列和第三列是唯一的行:
1 c 11 AAA
2 c 12 BBB
哪有我这样做?
使用'集团BY'。 –
tb_test1和tb_test2的外观如何?也许我可以为你写一个更简单的查询?你有什么数据,你想得到什么数据? –