表:
一:oracle行列轉換,逗號分隔,數據引號設置
select wm_concat(name1) name2 from (
(select ''''||max(t2.version_code)||'''' as name1 from cns_templet t2 GROUP BY oper_id)
)
結果:
二:查詢字段值作爲查詢條件
select * from cns_templet t where t.version_code in (
select max(t2.version_code) as name1 from cns_templet t2 GROUP BY oper_id
)
結果:
三:| | 的使用
SELECT '字段a'||'+'||'字段b' A FROM DUAL