今天在Ubuntu下安装 mysql-5.1.41 出现错误,看了一下 INSTALL-SOURCE ,后明白了所以把错误记下来了,错误大概如下: checking s
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今天在Ubuntu下安装 mysql-5.1.41 出现错误,看了一下 INSTALL-SOURCE ,后明白了所以把错误记下来了,错误大概如下:
checking size of int... (cached) 4
checking size of long... (cached) 8
checking size of void*... (cached) 8
checking for sched_yield... (cached) yes
checking for fdatasync... (cached) yes
checking for localtime_r... (cached) yes
checking whether byte ordering is bigendian... (cached) no
checking whether GCC atomic builtins are available... yes
checking whether pthread_t can be used by GCC atomic builtins... yes
checking whether Solaris libc atomic functions are available... checking for atomic_add_long... no
checking for atomic_cas_32... no
checking for atomic_cas_64... no
checking for atomic_cas_ulong... no
checking whether pthread_t can be used by Solaris libc atomic functions... no
checking size of pthread_t... 8
checking for x86 PAUSE instruction... yes
checking "for man pages to remove"... dropping ndbcluster embedded
configure: creating ./config.status
config.status: creating libmysql/libmysql.ver
config.status: creating zlib/Makefile
config.status: creating extra/yassl/Makefile
config.status: creating extra/yassl/taocrypt/Makefile
config.status: creating extra/yassl/taocrypt/benchmark/Makefile
config.status: creating extra/yassl/taocrypt/src/Makefile
config.status: creating extra/yassl/taocrypt/test/Makefile
config.status: creating extra/yassl/src/Makefile
config.status: creating extra/yassl/testsuite/Makefile
config.status: creating plugin/daemon_example/Makefile
config.status: creating plugin/fulltext/Makefile
config.status: creating storage/archive/Makefile
config.status: creating storage/blackhole/Makefile
config.status: creating storage/csv/Makefile
config.status: creating storage/example/Makefile
config.status: creating storage/federated/Makefile
config.status: creating storage/heap/Makefile
config.status: creating storage/ibmdb2i/Makefile
config.status: creating storage/innobase/Makefile
config.status: creating storage/innodb_plugin/Makefile
config.status: creating storage/myisam/Makefile
config.status: creating storage/myisammrg/Makefile
config.status: creating storage/ndb/Makefile
config.status: creating storage/ndb/docs/Makefile
config.status: creating storage/ndb/include/Makefile
config.status: creating storage/ndb/src/Makefile
config.status: creating storage/ndb/src/common/Makefile
config.status: creating storage/ndb/src/common/debugger/Makefile
config.status: creating storage/ndb/src/common/debugger/signaldata/Makefile
config.status: creating storage/ndb/src/common/logger/Makefile
config.status: creating storage/ndb/src/common/mgmcommon/Makefile
config.status: creating storage/ndb/src/common/portlib/Makefile
config.status: creating storage/ndb/src/common/transporter/Makefile
config.status: creating storage/ndb/src/common/util/Makefile
config.status: creating storage/ndb/src/cw/Makefile
config.status: creating storage/ndb/src/cw/cpcd/Makefile
config.status: creating storage/ndb/src/kernel/Makefile
config.status: creating storage/ndb/src/kernel/blocks/Makefile
config.status: creating storage/ndb/src/kernel/blocks/backup/Makefile
config.status: creating storage/ndb/src/kernel/blocks/dbdict/Makefile
config.status: creating storage/ndb/src/kernel/blocks/dbdih/Makefile
config.status: creating storage/ndb/src/kernel/blocks/dblqh/Makefile
config.status: creating storage/ndb/src/kernel/blocks/dbtup/Makefile
config.status: creating storage/ndb/src/kernel/error/Makefile
config.status: creating storage/ndb/src/kernel/vm/Makefile
config.status: creating storage/ndb/src/mgmapi/Makefile
config.status: creating storage/ndb/src/mgmclient/Makefile
config.status: creating storage/ndb/src/mgmsrv/Makefile
config.status: creating storage/ndb/src/ndbapi/Makefile
config.status: creating storage/ndb/test/Makefile
config.status: creating storage/ndb/test/ndbapi/Makefile
config.status: creating storage/ndb/test/ndbapi/bank/Makefile
config.status: creating storage/ndb/test/run-test/Makefile
config.status: creating storage/ndb/test/src/Makefile
config.status: creating storage/ndb/test/tools/Makefile
config.status: creating storage/ndb/tools/Makefile
config.status: creating pstack/Makefile
config.status: creating pstack/aout/Makefile
config.status: creating cmd-line-utils/readline/Makefile
config.status: creating Makefile
config.status: creating extra/Makefile
config.status: creating mysys/Makefile
config.status: creating unittest/Makefile
config.status: creating unittest/mytap/Makefile
config.status: creating unittest/mytap/t/Makefile
config.status: creating unittest/mysys/Makefile
config.status: creating unittest/examples/Makefile
config.status: creating strings/Makefile
config.status: creating regex/Makefile
config.status: creating storage/Makefile
config.status: creating man/Makefile
config.status: creating BUILD/Makefile
config.status: creating vio/Makefile
config.status: creating libmysql/Makefile
config.status: creating libmysql_r/Makefile
config.status: creating client/Makefile
config.status: creating sql/Makefile
config.status: creating sql/share/Makefile
config.status: creating sql/sql_builtin.cc
config.status: creating sql-common/Makefile
config.status: creating dbug/Makefile
config.status: creating scripts/Makefile
config.status: creating include/Makefile
config.status: creating tests/Makefile
config.status: creating Docs/Makefile
config.status: creating support-files/Makefile
config.status: creating support-files/MacOSX/Makefile
config.status: creating support-files/RHEL4-SElinux/Makefile
config.status: creating server-tools/Makefile
config.status: creating server-tools/instance-manager/Makefile
config.status: creating cmd-line-utils/Makefile
config.status: creating cmd-line-utils/libedit/Makefile
config.status: creating libmysqld/Makefile
config.status: creating libmysqld/examples/Makefile
config.status: creating mysql-test/Makefile
config.status: creating mysql-test/lib/My/SafeProcess/Makefile
config.status: creating netware/Makefile
config.status: creating sql-bench/Makefile
config.status: creating include/mysql_version.h
config.status: creating plugin/Makefile
config.status: creating win/Makefile
config.status: creating include/config.h
config.status: executing depfiles commands
config.status: executing libtool commands
/bin/rm: cannot remove `libtoolT': No such file or directory
config.status: executing default commands

MySQL函數可用於數據處理和計算。 1.基本用法包括字符串處理、日期計算和數學運算。 2.高級用法涉及結合多個函數實現複雜操作。 3.性能優化需避免在WHERE子句中使用函數,並使用GROUPBY和臨時表。

MySQL批量插入数据的高效方法包括:1.使用INSERTINTO...VALUES语法,2.利用LOADDATAINFILE命令,3.使用事务处理,4.调整批量大小,5.禁用索引,6.使用INSERTIGNORE或INSERT...ONDUPLICATEKEYUPDATE,这些方法能显著提升数据库操作效率。

在MySQL中,添加字段使用ALTERTABLEtable_nameADDCOLUMNnew_columnVARCHAR(255)AFTERexisting_column,刪除字段使用ALTERTABLEtable_nameDROPCOLUMNcolumn_to_drop。添加字段時,需指定位置以優化查詢性能和數據結構;刪除字段前需確認操作不可逆;使用在線DDL、備份數據、測試環境和低負載時間段修改表結構是性能優化和最佳實踐。

使用EXPLAIN命令可以分析MySQL查詢的執行計劃。 1.EXPLAIN命令顯示查詢的執行計劃,幫助找出性能瓶頸。 2.執行計劃包括id、select_type、table、type、possible_keys、key、key_len、ref、rows和Extra等字段。 3.根據執行計劃,可以通過添加索引、避免全表掃描、優化JOIN操作和使用覆蓋索引來優化查詢。

子查詢可以提升MySQL查詢效率。 1)子查詢簡化複雜查詢邏輯,如篩選數據和計算聚合值。 2)MySQL優化器可能將子查詢轉換為JOIN操作以提高性能。 3)使用EXISTS代替IN可避免多行返回錯誤。 4)優化策略包括避免相關子查詢、使用EXISTS、索引優化和避免子查詢嵌套。

在MySQL中配置字符集和排序規則的方法包括:1.設置服務器級別的字符集和排序規則:SETNAMES'utf8';SETCHARACTERSETutf8;SETCOLLATION_CONNECTION='utf8_general_ci';2.創建使用特定字符集和排序規則的數據庫:CREATEDATABASEexample_dbCHARACTERSETutf8COLLATEutf8_general_ci;3.創建表時指定字符集和排序規則:CREATETABLEexample_table(idINT

要安全、徹底地卸載MySQL並清理所有殘留文件,需遵循以下步驟:1.停止MySQL服務;2.卸載MySQL軟件包;3.清理配置文件和數據目錄;4.驗證卸載是否徹底。

MySQL中重命名數據庫需要通過間接方法實現。步驟如下:1.創建新數據庫;2.使用mysqldump導出舊數據庫;3.將數據導入新數據庫;4.刪除舊數據庫。


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