Oracle? ????? ?? ???? ???? ??
TodeletEduplicateRecordsinoracle, userOwidTouniqueLiDINGIFINTIFYSANDREMOVEDUPLICATES.2.FIRST, QUILDUPLOPITESBYGROUPINGONKEYCOLUMNS LIKEAMAILANDANMEANDUSINGHINGCOUNT (*)> 1TOFINDREPEATEDCOMBINATIONS.3.DELLETEDUPLATETHETHERY
Sep 02, 2025 am 09:40 AM
Oracle?? AWR ???? ???? ??
ConnectTothedatabaseusingsql*plusaSaprivilegedUser (? : sysdba) .2.runthescript@$ oracle_home/rdbms/admin/awrrpt.sqltostawrr eportgeneration.3.choosethereporttype (textorhtml) .4. enterthenumberofdayStodisplayavailablesNapshots.5.specifythebeginandendsn
Sep 02, 2025 am 09:38 AM
Oracle ???? ??? ???? ??
hintsinoraclesqlareinstructionsembededinqueriestoinfluencecteoptimizer'sexecutionplan, wingedefaultplanissuboptimal
Sep 01, 2025 am 07:47 AM
Oracle?? ???? ??? ???? ??
FlashbackQueryAllowsViewingHistoricalDatausingUndodata.2.useAsOfeSofeSoftImestAmptoQueryPastDatabyTime, theUndOretentionPeriod.3.useSwithinTheUseSscntoQueryDataAsofSpecificSystemChangEnumber, acuableviacurrent_scn.4.RecoverAcconmentalLallyDontEdormodi? ?????
Sep 01, 2025 am 03:24 AM
???? ???? Oracle?? ??? ??? ??? ??????
anindexinoracleisadatabaseobject? thatireclauses, toenforceuniquences, orforsortingroupinge;
Aug 31, 2025 am 08:19 AM
Oracle? Sysdate? ??????
sysdateinoraclereturnstheCurrentDateandtimedtimfromthedatabaseServasser'SoperatingSystem.1.ItincludesBothDateNdateNtOnTothEndAndAndOndOntheServer'Sclock, nottheclient's.2.ITTECLIENT'S.2
Aug 31, 2025 am 07:30 AM
Oracle?? Rownum? ???? ??
RownumisAssignedBeforeOderby, sotogetOrderDesults, SortInasubqueythenaplyrownum; 2. forpaginationlikerows6–10, Useanstedsubqueryytofirstsortandlimitto10, thenfilterfrownum> 5viaanalias;
Aug 30, 2025 am 08:50 AM
Oracle? ASM ??? ???? ?? ??? ??? ???? ??
audesqlquery : selectName, total_mb, free_mb, (free_mb/total_mb)*100aspct_freefromv $ asm_diskgroup; togetDiskGroupName, TotalSpace, fre espace, andpercentagefree.2.useasmcmdcommand : asmcmdlsdgtodisplaydiskgroupstate, totalandfreespaceinmb, anddrepacetype.3. query
Aug 30, 2025 am 08:22 AM
Oracle?? Pfile?? Spfile? ??? ??
tocreateanspfilefromApfile, firstEdensureaValidpfileExissinTheFaultLocationSpecifyAcustompath.2.connectTothedAtabaseusingsql*plussdbaprivilegesviasqlplus/assysdba.3.runcreatespfilefileptile; togerteTheSppfilepromeTepfilepfilepromeplepfilepfilepfilepfiletepfilepfiletepfiletepfile
Aug 29, 2025 am 08:32 AM
Oracle ??????? ???? ??
???? ????, ?? ?? ? ?? ??? ?? ?? ??? ????? ??????. 2. ??? ????? ???? ????, Oracle ??? ? ??? ???, ?? ?? ?? ? ? ??? ??????. 3. Oracle Database ?????? ??? ????? ?????? ?? ?????. 4. runinstaller? Oracle ???? ???? ??? ?? ?? ??? ???? ?? ??? ???? ?? ????? ??????. 5. DBCA? ???? ??????? ??? ???? ???? ?? ??? ??????. 6. Oracle_Base, Oracle_Home, Oracle_SID ? ?? ?? ?? ??; 7. SQLPLUS/ASSYSDBA? ?? ????? ???? ?????? ??? ???? ??? ????? ??????.
Aug 29, 2025 am 07:51 AM
Oracle?? ???? ??? ??
ConnectTotheOracledatabaseusingAprivilegedAccountlikesorsySorsystemwithdbaprivileges.2.CreateSerUserUseruseSureSureSureSureSureSureSureSuReateSerCommandWitHaUserNameAndPassword, Forexamplip : CreateUserjohnInditifiedByseCurePass123.3.3
Aug 28, 2025 am 08:51 AM
Oracle?? ??? ??? ???? ??
runlsnrtlStatUtcheckifTheListenisRunning, itprotocoladress, ? ?? ???? ???; 2ndforacustom-namedlisten, uselsnrtls tatuslisten_dg; 3. VerifyConfigurationInListes.ORAANDRELOADWITHLSNRCTLRELOWTAFTERCHANGES; 4thstartthlisterusinglnrtlstar
Aug 28, 2025 am 08:38 AM
Oracle? ??? ????? ??? ??? ???? ??
??? ????? ??? ??? ????? ADDATAFILE ?? ????? AltertablesPace ??? ???????. 1. ??, dba_tablespaces ? dba_data_files? ???? ??? ??? ?? ??? ?? ??? ??????. 2. AltertableSpace ??? ???? ??? ??? ??? ???? ?? ??, ??, ?? ?? ? ?? ?? ??? ?????. 3. ????? ?? ??? ?????? ?? ?? ?? ??? ??? ????. 4. ? ?? ??? ??? ?? ? ??? ???? ?? ?? ? ??? ?? ? ?? ? ? ????. 5. ?????, Query dba_data_files? ? ??? ??? ????? ???? ?????? ??????. ?? ????? ???? ??? ???? ???? ??????.
Aug 27, 2025 am 06:28 AM
SQL ???? Oracle ??????? ???? ??
OpenOraclesQlDeveloperandright-ClickConnectionStosElectNewConnectionOrClickThegreen ICON.2. enteraconnectionName, Username, Possive, ChoiceBasicConnectionType ? ProvideHostName, Port (????? 1521), andserviceNameorsId.3.3.clickTestTeTeConnection; ifsu
Aug 27, 2025 am 04:31 AM
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