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SQL?? ??? ??? ???? ??
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Aug 14, 2025 pm 03:08 PM
XADD? ???? ???? ???? ???? ???
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Phpmyadmin? ?????? ??? ?????
logintophpmyadminwithAdministrativePrivileges.2.gotothe "userAccounts"tabandlocateThetArgetUser.3
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phpmyadmin?? ??? ???? ???? ??
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Aug 14, 2025 pm 02:47 PM
MySQL ?? ??? ???? ??? ???? ??
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MySQL ?? ?? AWS S3 ?? Google ???? ????
MySQL? ??? AWSS3 ?? GOOGLECLOUDSTORAGE? ?????? ?? ????? ???? ??? ????? CRON?? ????? ??? ??? ???????. 1. ?? ??? ???? ?? ?????? ?? ?? ? ?? ???? ?? ? MySqlDump ????? ????. 2. AWSCLI ?? GSUTIL ??? ???? ??? S3 ?? GCS? ???????. 3. ?? ?? 2?? CRON ??? ??? ?? ????? ???? ???? ??? ?????. 4. ???? ??? ???? ?? 7 ? ?? ??? ??? ????? ????? ?? ??? ??????. ?? ????? ???? ???? ????? ?? ????????.
Aug 14, 2025 pm 02:11 PM
MySQL ??? ?? ?? ?? ??
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MySQL ????? ?? ?? ?? ??? ??????
tofindDuplicatesInasInasingLecolumnikeEmail, useGroupByWithHavingCount ()> 1ToshOwValuesAppeAringMoreThanOnce.2.fordUplicatesAcrossMultipleColumnsSsuchasfirst_nameAndllast_name, applyGroupByOnTheCombinedColumnsWithHavingCount ()
Aug 14, 2025 pm 02:02 PM
MySQL? ?? ???? ??? ??????
InnoDB? MySQL ?? ?? ???? ????, ?? ??? ? ??? ???? ??? ??????? ???? ? ?? ??, ?? ? ? ?? ??? ?????. MyISAM? ?? ??? ? ? ???? ????? ????? ? ?? ???? ????. ??? ??? ???? ?? ??? ??? ???? ??? ? ???? ????. CSV? ??? ??? ???? ????? ?? ?? ???? ?????. Blackhole? ??? ? ??? ???? NDB? ? ??? ???? ??? ???? Federated? ?? ???? ????? ? ???? Merge? ? ?? ???? ?? Myisam ?? ?????. ?? ??? ?? ?? ??? ?????????. InnoDB? ???? ?? ?? ????? ?????.
Aug 14, 2025 pm 01:47 PM
ORA-01034 ?? ?? ?? : Oracle? ??? ? ????
?? Oracle ????? ?? ??? ??????. PMON ???? (Linux/UNIX) ?? ??? ?? (Windows)? ???? ???? ??? ????? ???????. 2. ?? ?? ??? ?? ??? ??? ??? ?? Oracle_SID ? Oracle_Home ?? ??? ???? ???? ??? ??????. 3. SQLPLUS/ASSYSDBA? ???? ????? ?? ??? ???? ??????? ???? ??? ?? ?? ??? ??????. 4. Alert Log ?? ($ Oracle_Base/Diag/RDBMS /// TRACE/ALERT_.LOG? ??)? ????? ?? ?? ?? ? ?? ? ??? ??? ??? ?? ??? ?? ?? ??? ?????.
Aug 14, 2025 pm 01:12 PM
SQL?? Union? ???? ? ???? ??? ???? ??? ??????
Union? ???? ? ???? ??? ????? Select ?? ? ?? ???? ?? ?? ??? ??? ???? ?? ??? ?? ???? ???????. 1. Union? ???? ?? ?? ???? ??????. ?? ? (?? ??)? ??? ?? ??? ???????. 2. ?? ??? ? ??? ? ?? select ??? ????. 3. ? ?? ??? ?? ??? ?? ? ? ??? ?? ??? ?? Orderby ?? ?? ? ? ????. 4. ???? ???? ? ?, ???? ?? ??? ??? ??? ? ?? ??? ????? ?? ???? ?? ?????. ??? Union ?? Unionall? ?? ?? ????? ??? ?? ??????? ? ?? ??? ???? ???? ????? ?? ? ?? ? ?? ??? ?????.
Aug 14, 2025 pm 12:28 PM
?? CTE? ???? SQL?? ?? ? ???? ???? ??? ??????
?? CTE? ???? ?? ? ???? ?? ? ? ?? ?? ?? (? : ??? ??? ??? ??)? ?????. 2. ?? ?? ?? ?? ??? ?? ????? ?? ??? ???? ?? ???? ??????. 3. ? ?? ?? ?? ??? ??? ???? ?????. 4. Unionall? ??? ??? ?? ????????. 5. ?? ??? ?? ??? ???? ?? ?????? ?? ????????? ??? ?????. 6. ?? ???? ???? ?? ???? ?? ??? ????? ?? ? ? ????. 7. PostgreSQL, SqlServer, Sqlite, MySQL8.0 ? Oracle All Appurect Repursive CTE; 8. ?? ?? ?? ?? ??? ?? ?? ?? ?? ??, ??, ?? ?? ?? ???? ?????.
Aug 14, 2025 pm 12:23 PM
MySQL?? ?? ?? ??? ???? ???? ??
MySQL? ?? ?? ??? ??? ????? st_distance_sphere () ??? ???? ??? ?? (?? ? ??)? ??? ??????. 1. ??? ?? ?? ?? ? ???? ??? srid4326? ?????. 2. ST_DISTANCE_SPHERE () ??? ???? ??? ??? ?? ???, ?? ??? ?????. 3. ??? ?? ???? ?? ???? ???? mbrwithin ()? ?? ?? ? ?? ?? ???? ???? ???? ???????. ?? ?? : selectId, name, st_distance_sphere (coord, point (40.7128, -74.0060)) asdistancefroml
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