oracle中常用函数WM_CONCAT(行转列)

WM_CONCAT-列转行函数：

用法： create table T002

(

APPROVAL_NO varchar2(200),

APPROVAL_NAME varchar2(200),

APPROVAL_LINE_NOTE varchar2(200)

)

insert into T002 values('1001','张三','意见一');
insert into T002 values('1001','李四','意见二');
insert into T002 values('1001','王五','意见三');
insert into T002 values('1001','小六','意见四');
insert into T002 values('1001','小七',null);
insert into T002 values('1002','小七','意见一');
insert into T002 values('1002','小八',null);

select APPROVAL_NO,replace(wm_concat(APPROVAL_NAME || ‘:’ || APPROVAL_LINE_NOTE ),’,’ ,chr(10) || chr(13) ) as note

from T002

where APPROVAL_LINE_NOTE is not null

group by APPROVAL_NO;

结果：APPROVAL_NO note

1001 张三:意见一

李四:意见二

王五:意见三

小六:意见四

1002 小七:意见一