--要求，name或tel有一個(gè)重復(fù)，則就算是重復(fù)的，取重復(fù)記錄最大的id列表 if object_id('t') is not null drop table t create table t( id int, name varchar(10), tel varchar(10) ) insert into t values(1,'zhang','11111'); insert into t values(2,'zhang','11111'); insert into t values(3,'zhang','22222'); insert into t values(4,'test','33333'); insert into t values(5,'test','12345'); insert into t values(6,'test1','55555'); insert into t values(7,'test3','33333'); /* 這個(gè)地方你來(lái)，先謝了，呵呵。。。 */ --結(jié)果 id 3 6 7
用CTE實(shí)現(xiàn)方法:;WITH a AS ( SELECT a.*,b.ID AS ID2 FROM t AS aINNER JOIN t AS b ON (a.name = b.name or a.tel = b.tel) AND a.ID<>b.ID ),b AS ( SELECT id,NAME,tel FROM a AS a2 WHERE NOT EXISTS(SELECT 1 FROM a WHERE (a.name = a2.name or a.tel = a2.tel) AND a.ID2>a2.ID) ) SELECT * FROM b UNION SELECT * FROM t AS a2 WHERE NOT EXISTS(SELECT 1 FROM a WHERE id=a2.ID) /* id NAME tel 3 zhang 22222 6 test1 55555 7 test3 33333 */
原貼:http://bbs.csdn.net/topics/390173231

轉(zhuǎn)載于:https://www.cnblogs.com/wuxi88/archive/2013/01/02/5466750.html

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