oracle语句中把一列的值合并为一个值，用逗号隔开

来源：互联网发布：网络公司员工培训编辑：程序博客网时间：2024/05/14 22:10

所有版本的oracle都可以使用wm_concat()函数
例：select wm_concat(name) as name from user;

但如果是oracle11g，使用listagg() within group()函数
例：select listagg(name, ‘,’) within group( order by name) as name from user;

例：

CREATE TABLE MyTest(xType NUMBER,City nvarchar2(200));    /INSERT INTO MyTest(xType,City)    SELECT 1,'北京' FROM dual UNION ALL    SELECT 1,'上海' FROM dual UNION ALL    SELECT 1,'广州' FROM dual UNION ALL    SELECT 2,'武汉' FROM dual UNION ALL    SELECT 2,'杭州' FROM dual UNION ALL    SELECT 2,'厦门' FROM dual    COMMIT;

使用wm_Concat:

SELECT xType,wmsys.wm_concat(to_char(City)) AS xCity FROM MyTest GROUP BY xType

使用ListAgg:

SELECT xType, ListAgg(to_char(City),',') WITHIN GROUP(ORDER BY xType) AS xCity FROM MyTest GROUP BY xType

结果：

 XTYPE          XCITY----------   --------------------------------------   1           北京,广州,上海   2           杭州,武汉,厦门

0 0