示例:
1.SELECT DISTINCT CONCAT(CORP_KEY,'_',CREATED_TIME) FROM corp_info
2.SELECT DISTINCT CONCAT_WS('_',birth_date,age) FROM personnel_info
3.SELECT DISTINCT GROUP_CONCAT(birth_date) FROM personnel_info
示例:
1.SELECT DISTINCT CONCAT(CORP_KEY,'_',CREATED_TIME) FROM corp_info
2.SELECT DISTINCT CONCAT_WS('_',birth_date,age) FROM personnel_info
3.SELECT DISTINCT GROUP_CONCAT(birth_date) FROM personnel_info