oracle中将列转化为行

嵇4963

oracle 10g以后 wm_concat函数的运用
准备测试数据
 create table test(id number,name varchar2(20));
insert into test values(1,'a');
insert into test values(1,'b');
insert into test values(1,'c');
insert into test values(2,'d');
insert into test values(2,'e');
　　效果1 : 行转列
SQL> select wm_concat(name) from test;
WM_CONCAT(NAME)
a,b,c,d,e
　　效果2: 把结果里的逗号替换成"|"
SQL> select replace(wm_concat(name),',','|') from test;
REPLACE(WM_CONCAT(NAME),',','|')
a|b|c|d|e
　　
效果3:按ID分组合并name
SQL> select id,wm_concat(name) name from test group by id;
ID NAME
1 a,b,c