???????????μ????????????и???????п?????????????????????????м??????????????????????????????????????????????????????????????????????ü????????ASCII????????????????д?????????????????SQL?е??????????????о?????????????????????????????????????????????????Oracle???????????????????Convert?????????????????????????????????????溬?з?ASCII???????????????????д????????????￡??????У?5500????10???????????????????????????
????select*
????from(select'abcd'c1fromdual
????unionall
????select'ab????cd'c1fromdual)
????wherec1<>CONVERT(c1??'US7ASCII'??'ZHS16GBK');
????C1
????--------
????ab????cd
????CONVERT?????????
????CONVERT(inputstring??dest_charset??source_charset)
????inputstring?????????????
????dest_charset??????????
????source_charset????????