?????SQL?????????????????????????
???????????? ???????[ 2017/3/10 11:17:58 ] ????????????? SQL
????17.?????????????? clustered ?????????У???? clustered ?????????е???????????????洢?????????????佫?????????????????????????????????????????????????????? clustered ?????????У?????????????????????????? clustered ??????
????18.???????????????Σ????????????????ξ???????????????????????????????????????????洢???????????????????????????? ???????????????????????????????????????????????????ι????
????19.?????????? varchar/nvarchar ???? char/nchar ????????????δ洢???С?????????洢?????ζ???????????????????С???????????Ч????????Щ??
????20.?κε?????????? select * from t ???t????????б????“*”??????????ò??????κ???Ρ?
????21.????????????????????????????????????????????????????????????????????????????
????22.???????????????????????????????????????????????????????????????????????????Щ???????Ч?????磬?????????????????????е??????????????????????????????? ???????????
????23.??????????????????????????????????????????? select into ???? create table???????????? log ???????????????????????????????????????????create table?????insert??
????24.?????????????????洢?????????????е???????????????? truncate table ????? drop table ?????????????????????????????
????25.????????????α?????α??Ч????????α?????????????1???У???????????д??
????26.???????α???????????????????????????????????????????????????????????????Ч??
????27.?????????????α??????????á???С?????????? FAST_FORWARD ?α????????????????д??????????????????????ü?????????????????????????????а???“???”????????????????α???е????????????? ????????????α???????????????????????????£?????????????Ч?????á?
????28.?????е?洢???????????????????? SET NOCOUNT ON ???????????? SET NOCOUNT OFF ??????????д洢???????????????????????????? DONE_IN_PROC ?????
????29.?????????????????????????????????
????30.??????????????????????????????????????????????????????????
????????????????????? DELETE ??INSERT ?????????SQL???
????????????????????????????????????? DELETE ?? INSERT ?????????????С?????????????????????????????????????????????????????????????????????????????????
????Apache ???к???????????????????乤??????????Ч??????????????????????????????????????????????????????????????????????飬????????檔
????????????????????????????30????????????????к???????????????????30???????????????/?????????????????????????????????????????WEB??????????????????????????????????????
????????????????????????????????????????? LIMIT oracle(rownum)??sqlserver(top)??????????????????????????mysql?????
????while(1){
????//??????1000??
????mysql_query(“delete from logs where log_date <= ’2012-11-01’ limit 1000”);
????if(mysql_affected_rows() == 0){
????//????????????
????break??
????}
????//??????????????????????????/???????
????usleep(50000)
????}
???????????????????????漰???????????????????SPASVOС??(021-61079698-8054)?????????????????????????
??????
?????????????????????????Щ????????????????????TC???????????????Щ???????????????????????????????????????????????(java .net ?????)???mysql???????????????????ж????д???Python???????????????(DB2)??????BufferPool????????????????????????????????6??????????????????滮???????????????-????????SQL Server???????????????????λ?????PHP??SQL????????????????????Pythonд???NoSQL????????? SQL ?е????????????? SQL ?е?????????Java???????:?????MySQL???????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11????????
?????????App Bug???????????????????????Jmeter?????????QC??????APP????????????????app?????е????????jenkins+testng+ant+webdriver??????????????JMeter????HTTP???????Selenium 2.0 WebDriver ??????