资料库查询错误，条件是 select A.engs,A.bchap,A.bsec,A.echap,A.esec,A.txt,A.id,B.chinesef from comment as A,main as B where A.engs=B.engs and A.tag=20 and A.engs='2 Sam' and (A.bchap*1000+A.bsec)<= 5021 and (A.echap*1000+A.esec)>= 5021 !