从表中删除重复记录 - SQL查询

Question

我只需要从表中删除重复行,就像我在表中有3个重复行一样,我的查询将从3个重复行中删除2行.

我怎么能得到这个？请帮我.

Answer 1

请尝试以下查询,它一定会符合您的目标

SET ROWCOUNT 1
DELETE test
FROM test a
WHERE (SELECT COUNT(*) FROM test b WHERE b.name = a.name) > 1
WHILE @@rowcount > 0
  DELETE test
  FROM test a
  WHERE (SELECT COUNT(*) FROM test b WHERE b.name = a.name) > 1
SET ROWCOUNT 0

其中,测试是你的表名