1. SQL查重
-- SQL语法:SELECT 查重的列名 FROM 表名 GROUP BY 查重的列名 HAVING COUNT (查重的列名)>1
例:SELECT SPARETEXT1 FROM T_PRODUCTLOG GROUP BY SPARETEXT1 HAVING COUNT (SPARETEXT1)>1
-- 查询相应重复数据的所有列
SELECT * FROM T_PRODUCTLOG WHERE SPARETEXT1 IN (SELECT SPARETEXT1 FROM T_PRODUCTLOG GROUP BY SPARETEXT1 HAVING COUNT (SPARETEXT1)>1)
1.1 查某列重复的字段
1.2 查多列都含重复的字段
SQL 语法:SELECT 查重的列名1,查重的列名2,...(此处也可以只写需显示的某一个含重复列名) FROM 表名 GROUP BY 查重的列名1,查重的列名2,... HAVING COUNT (查重的列名1)>1
例:SELECT SPARETEXT1,SPARETEXT2 FROM T_PRODUCTLOG GROUP BY SPARETEXT1,SPARETEXT2 HAVING COUNT (PROBERID)>1