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MySQL? ??? ????? ?? ????, ?? ?? ? ??? ??? ?? ?? ???????. 1. ?? ????? ??????. ?? ???? ??? ?? Sudorm-RF/USR/Local/MySQL*? ???? ??????. Homebrew? ??? ?? BrewuninStallmysql? ??????. 2. ??? ? ?? ?? ?? : /etc/my.cnf, ~/.my.cnf, /usr/local/etc/my.cnf,/var/db/mysql,/usr/var/var/var/var/var/mysql_history ?? ?? ???? ??? ???? ?????.
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inmysql, nullandanemptystring''Arenotthesame.1) nullRepresenseScenceOvalueOrunkNowndata, whileanemptystringisavalidStringwithzerocharacters.2) ?? ???? ?? =,! =, Ordonotworkwithnull;
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MySQL Workbench? ?????? ??? ??? ? ????
"ConnectTodatabaseServer"??? ?? ? ?? MySQL ???? ?? ??? ??? ?? ?? ?? ??? ??? ?? ??? ?? ???? ?? ????? ?? ??? ??? ?? ??? ?? ??? ??????. 1. MySQL ???? ??? ??????. Windows? ??? ???? ?? MySQL ???? ??????. MacOS/Linux? ?? ?? ?????? ?????. 2. ??? ??, ??, ??? ?? ? ????? ???? ???? ?? ??? ??? ??????. 3. ??? ??? ??? ?? ?? ??? ? ???? ??? ?? ?? ??? ?? 3306? ??????. 4. ???? ????
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MySQL Workbench?? ??? ????? ??? ??? ????? ??
mysqlworkbenchdoesnothaveAbeable-indarkmode, butyoucancustomize atpartichroughseveralmethods.first, enableStem-widedarkModeonWindowSormacostArkensomeUielementslikemenusandDialogs — ThoughtheCond
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MySQL ? ??? PHP? ????? ?? ?????? ??? ????? ?? ? ??? ??? ???????. 1. MySQLI ???? ???? ??????? ???? ?? ????. NewMySqli ()? ?? ??? ??? ?? ??? ??????. 2. Query () ???? ???? SQL ??? ???? Fetch_assoc ()? ???? ?? ??? ?? ??? SQL ??? ???? ? ??? ???? ???? ?? ???? ????? ?????. 3. ???? ????? ???? ? ? repay () ? bind_param ()? ???? ????? ????? ?? ??? ??? ?????. 4. ???? ???? ?? ??, ?? ??, ?? ?? ?? ?????. ??, ?? ??, ?? ?? ? ?? ?? ????? ???? ??? ??? ? ????. ? ?? ??? ???????
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Windows? Python? MySQL ??????? ????? MySQL-Connector-Python ?? PymySQL ??? ???? ?? ?? ?? ? ???? ??? ???? ???????. 1. ?? ?? : PipinStallMysQL-Connector-Python ?? PipinStallPymySQL ??; 2. ?? ?? ?? : ???, ???, ???? ? ?????? ?? ??? ?????. ?? ?? ?? ?? ??? ?? ??? ??? ???? ?? ????. 3. ?????? ???? ?? ??????? ?? ?? ??? ??? ??? ??????. 4. ?? 3306? ?? ??? ????? ??? ??? ??????. 5
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???? ???? ??? ?? ??? ???? ??? ??????
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?? ? ?? ??? ?? MySQL ????
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select ?? MySQL ????
TheselectStatemonScommonlyOdsQlCommandForMandForReTrievataFrommySqlDatabases, WhowichColumnStorEtrieve, FilterRowsBasedOnConditionSusingWhere.1)? ?????
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?? ? Mac?? MySQL? ??????
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MySQL ?? ?? ?? ?? ?? ??
mysqlworkbench?? ?? ?? ??? ????? ?? ??? ? ??? ?????. 1. select/max_execution_time (5000)/*fromyour_table? ?? SQL ??? ??? ? ????. ?? ?? ??? ?? ??? ?????. 2. ?? ?? ?? setsessionwait_timeout = 60; ? setsessioninteractive_timeout = 60; ??? ?? ?? ??? ????? ?? ??? ???? ????. 3. ???? ?? ????? ?? ??????? ???? ?? ???? ?? ?? ??? ???? ?? ????. 4. ?? ???? "Stan"? ??????.
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MySQL ??? ???? ?? ??? ???? ??? ??????
TOSETUPMYSQLMASTER-SLEVEREPOLCATION, FIRSTENSUREBOTHSEREREADYBYCONFIRMONTIVERCOMPATIVE, STATICIPS ? OPENFIREWALLPORTS.THENTERVERSERVERVERVERVERVERBYENABLEADBERINGLOGGINGANDANTTINGAUNIQUESERVERID, FUCKBYCRATINGADEDI
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