-----sqlserver中如何删除没有主键的重复数据。 CREATE TABLE TestTable ( Column1 varchar(1), Column2 int ); INSERT INTO TestTable VALUES ('A',1); INSERT INTO TestTable VALUES ('A',1); -- duplicate INSERT INTO TestTable VALUES ('A',2); INSERT INTO TestTable VALUES ('B',1); INSERT INTO TestTable VALUES ('B',2); -- duplicate INSERT INTO TestTable VALUES ('C',2); SELECT * FROM TestTable a ORDER BY a.Column1,a.Column2; DELETE FROM TestTable WHERE TestTable.%%physloc%% NOT IN (SELECT MIN(b.%%physloc%%) FROM TestTable b GROUP BY b.column1,b.Column2);
