MariaDB [(none)]> create database if not exists test2; (3)如果名为test1的数据库不存在,则创建,并且设置其字符集为utf8 MariaDB [mysql]> create database test3 character set utf8; MariaDB [(none)]> create database if not exists t
DROP COLUMN IF NOT EXISTS col_name col, DROP INDEX IF EXISTS idx_name; This feature is not compatible with Oracle MySQL, and MariaDB’s executable comments cannot help here. You may write two different upgrade scripts, one for MariaDB and one for Oracle MySQL… but this feature should sim...
1.创建触发器 以下是MariaDB中create trigger的语法:MySQL不支持or replace和if not exists子句。 CREATE [OR REPLACE] TRIGGER [IF NOT EXISTS] trigger_name { BEFORE | AFTER } { INSERT | UPDATE | DELETE } ON tbl_name FOR EACH ROW trigger_body 触发器只能建立在永久表上,不能建立在视图和临时表上...
CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name (create_definition,...) [table_options] [partition_options] Or: CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name [(create_definition,...)] [table_options] [partition_options] select_statement Or: CREATE [TEMPORARY] TABLE [IF NOT EXISTS...
以下是MariaDB中create trigger的语法:mysql不支持or replace和if not exists子句。 1 2 3 4CREATE[OR REPLACE]TRIGGER[IF NOT EXISTS]trigger_name{BEFORE|AFTER} {INSERT|UPDATE|DELETE}ONtbl_nameFOREACHROWtrigger_body 触发器只能建立在永久表上,不能建立在视图和临时表上。MySQL/MariaDB中的触发器只支持行...
CREATE DATABASE IF NOT EXISTS test;设置当前名称空间和数据库:USE test;分别创建三个表：表一名称：...
IF NOT EXISTS 当使用IF NOT EXISTS子句时,如果指定的用户已经存在,则 MariaDB 将返回一个警告而不是错误。 例如: CREATE USER foo2@test IDENTIFIED BY 'password'; ERROR 1396 (HY000): Operation CREATE USER failed for 'foo2'@'test' CREATE USER IF NOT EXISTS foo2@test IDENTIFIED BY 'password';...
MariaDB [(none)]> CREATE DATABASE IF NOT EXISTS mydb; // 此条命令产生的效果为:如果mydb数据库不存在,就创建一个名为mydb的新数据库 1. 2. 删除数据库: DROP DATABASE|SCHEMA [IF EXISTS] 'DB_NAME'; 例: MariaDB [(none)]> DROP DATABASE IF EXISTS mydb; ...
CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name{ LIKE old_tbl_name | (LIKE old_tbl_name) } 1. 2.查看表的信息 show table status like ‘table_name’ 1. 3.删除表 DROP [TEMPORARY] TABLE [IF EXISTS]tbl_name [, tbl_name] ...[RESTRICT | CASCADE] ...
DROP DATABASE IF EXISTS testdb1; CREATE DATABASE testdb1; # 创建测试表-余额表 DROP TABLE IF EXISTS account; CREATE TABLE IF NOT EXISTS account (user_id BIGINT PRIMARY KEY, # 用户id account BIGINT # 账户余额 ); # 创建测试表-创建利润分成表 ...