標籤:mysql workbench cannot be executed from a path that contains non-ASCII characters. this problem is imposed by used third party libraries. please run this application from the default installation path or at least path which is all ASCII
標籤:0安裝資料庫sudo apt-get install mysql -server設定root密碼1登入mysql資料庫 建立使用者etc/init.d/mysql start mysql -uroot -p密碼;insert into mysql.user(Host,User,Password) values("%","dba",password("123456"));grant all privileges on *.* to ‘dba‘@‘%‘ identified by
標籤:MySql in子句 效率低下最佳化背景: 更新一張表中的某些記錄值,更新條件來自另一張含有200多萬記錄的表,效率極其低下,耗時高達幾分鐘。update clear_res set candelete=0 where resid in( select distinct resourceid from att_attentionresult where important=0);耗時 365s 最佳化後 update clear_res set candelete=0
標籤:sql及索引最佳化開啟慢查詢日誌查看慢查詢日誌是否開啟mysql> show variables like ‘slow_query_log‘;+----------------+-------+| Variable_name | Value |+----------------+-------+| slow_query_log | OFF |+----------------+-------+1 row in set (0.00 sec)mysql> set
標籤: php的ci是一個mvc模式的架構,本文是通過php+ci對mysql資料庫進行增刪改查。0. 首先在mysql資料庫方建立資料庫和資料表1 create database test;2 use test;3 create tables user(4 id int(10) not null auto_increment,5 name varchar(50) not null,6 age int(10) not null,7 primary key
標籤:mysql 錯誤yum方式安裝mysql省去了原始碼包安裝的許多步驟,但是有時會遇見mysql yum封裝完mysql之後,在啟動mysql服務時,啟動不了的問題,報錯: Can‘t connect to local MySQL server through socket ‘/tmp/mysql.sock‘ (2),找不到mysql.sock檔案,mysql.sock檔案是安裝mysql之後初始化資料庫之後才會出現的,因此在安裝完包之後,做一下步驟:添加 mysqld