在sql里面加判断条件

select b.bnk_nm as CAP_CORG_NM,a.* from (

select c.*,

(case

when c.CAP_CORG_Y like '%_DC'
then SUBSTR(c.CAP_CORG_Y,0,LENGTH(c.CAP_CORG_Y)-3)

when c.CAP_CORG_Y like 'DC_%'
then SUBSTR(c.CAP_CORG_Y,LENGTH(c.CAP_CORG_Y)-3,LENGTH(c.CAP_CORG_Y))

else c.CAP_CORG_Y end) CAP_CORG FROM (

SELECT substr(CAP_CORG,4,length(CAP_CORG)) as CAP_CORG_Y,USR_NO ,CRD_TYP,CAP_CRD_NO,VIR_CRD_NO AS CAP_CRD_NO1,USR_NM,MBL_NO,VIR_MBL_NO AS MBL_NO1,VIR_ID_NO AS BNK_ID_NO,TM_SMP FROM PWMTQPAG ) c

) a LEFT JOIN CMMTBKCD b on a.CAP_CORG = b.CORP_ORG