A . SELECT[ccode]FROM[GL_accsum]where not exists（SELECT*FROM[code]group by ccode having[ccode]=[GL_accsum].[ccode]）
B . SELECT[ccode]FROM[GL_accsum]v where ccode not in（SELECTccodeFROM[code] where[ccode]=[v].[ccode]）
C . select A. ccode from[GL_accsum]a left join code bon A.[ccode]=[b].[ccode] where B.ccode is null
D . select A.ccode codes from[GL_accsum]a join code bon A.[ccode]=[b].[ccode] where B.ccode is null