oracle WMSYS.WM_CONCAT 函数使用

1、用法

WMSYS.WM_CONCAT(要连接的字段)

该函数返回来自同一个分组的指定字段的非NULL值的连接起来字符串，默认逗号连接，一般搭配分组函数使用

select XFJ_ID,RELATED_WORD from "PLATFORM"."TAB1010230" t where xfj_id='1492018952426098688';

以XFJ_ID分组，将RELATED_WORD 字段值打印在一行，逗号分隔(默认)

select XFJ_ID,WMSYS.WM_CONCAT(RELATED_WORD) from "PLATFORM"."TAB1010230" t
where xfj_id='1492018952426098688' group by XFJ_ID;

去重

select XFJ_ID,WMSYS.WM_CONCAT(distinct RELATED_WORD) from "PLATFORM"."TAB1010230" t
where xfj_id='1492018952426098688' group by XFJ_ID;

亲测，达梦数据库也有这个函数，以上示例使用达梦数据库