????????SQL?????????????
????1?????????????????
????2??????????ε??Щ???
???????ú??????????β??????????????磺
????substr(hbs_bh??1??4)=’5400’??????????hbs_bh like ‘5400%’
????trunc(sk_rq)=trunc(sysdate)?? ????????sk_rq>=trunc(sysdate) and sk_rq<trunc(sysdate+1)
???????????????????????????β?????????????磺ss_df+20>50??????????ss_df>30
????‘X’ || hbs_bh>’X5400021452’??????????hbs_bh>’5400021542’
????sk_rq+5=sysdate??????????sk_rq=sysdate-5
????hbs_bh=5401002554??????????hbs_bh=’ 5401002554’?????????????hbs_bh ?????????to_number????????hbs_bh???????????
????????????????????????????????????????????磺ys_df>cx_df????????????
????qc_bh || kh_bh=’5400250000’??????????qc_bh=’5400’ and kh_bh=’250000’
???????????
????ORACLE????????????????????????????????????????????ORACLE??е???????飬????????????????????ORACLE??????????????С???????????????????????????ORACLE????????????????????????????????????????????????????????????????????????????ORACLE??SQL??з?????????????????????????е?·??????????????????????????????????????????????????????楨??????????????????????????????????????????????????????