標籤:MySQL: Get next AUTO_INCREMENT value from/for tableNote to self: To get the next auto_increment value from a table run this query: SELECT AUTO_INCREMENT FROM information_schema.TABLES WHERE TABLE_SCHEMA = $dbName AND
標籤:1.[ERROR] InnoDB: Data file /usr/local/mysql-5.6.30/data3306/ibdata1 is of a different size[[email protected] mysql]# less /etc/my.cnf |grep innodb_data_file_pathinnodb_data_file_path = ibdata1:200M:autoextend[[email protected] mysql]#
標籤:這篇文章主要介紹了MySQL中使用show profile命令分析效能的用法整理,show profiles是資料庫效能最佳化的常用命令,需要的朋友可以參考下 show profile是由Jeremy Cole捐獻給MySQL社區版本的。預設的是關閉的,但是會話層級可以開啟這個功能。開啟它可以讓MySQL收集在執行語句的時候所使用的資源。為了統計報表,把profiling設為1 mysql> SET profiling =
標籤:更新表資料:update table_name set xxx=xxx where condition;增加欄位:alter table table_name add field type other;e.g:alter table MyClass add passtest int(4) default ‘0‘;刪除欄位:ALTER TABLE table_name DROP field_name;增加刪除索引:# 增加alter table 表名 add index 索引名 (欄位名1[
標籤:就是簡單的一個字串拼接,意義和所用情境自己體會下insert into table agent_library1 select concat_ws(‘:‘,collect_set(name)) as name,contact,concat_ws(‘:‘,collect_set(company)) as company,concat_ws(‘:‘,collect_set(stores))as stores,concat_ws(‘:‘,collect_set(city)) as
標籤:conn = MysqlJdbcUtils.getConnection();Statement ps=conn.createStatement();ps.addBatch("truncate QB_ShowCount_Asite_copy");ps.executeBatch();String SrcSql = "select convert(unhex(hex(convert(Community using latin1))) using utf8) as Community ,PID
標籤:linux lamp mysql password 登入資料庫時,可能會忘記密碼,怎麼辦呢? 方法:編輯mysql設定檔,不讓mysql去授權;之後輸入mysql無使用者登入,因為是root使用者,所以在mysql庫裡進行密碼的重設mysql密碼重設過程及語句:[[email protected] ~]# mysql