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、C.select ccode from[GL_accsum]a left join code bon A.[ccode]=[b].[ccode] where B.ccode is null
- D、D.select ccode codes from[GL_accsum]a join code bon A.[ccode]=[b].[ccode] where B.ccode is null
正确答案:A
答案解析:有

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