MySQL拼接函数

原始表结构

SELECT ProvinceName,CityName,DistrictName FROM AREA

1、CONCAT函数

SELECT  CONCAT(ProvinceName,CityName,DistrictName) FROM AREA

2、CONCAT_WS函数

SELECT  CONCAT_WS('-',ProvinceName,CityName,DistrictName) FROM AREA

3、GROUP_CONCAT

SELECT CityName,GROUP_CONCAT(DistrictName) FROM AREA GROUP BY cityId