• 2022-06-05
    关于两个表对应的不匹配查询的正确语句为()
    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