mysql drop schema if exists example

Grammar:Delete TableDROP table Syntaxdrop [temporary] table [IF EXISTS] tbl_name [, Tbl_name] ... [RESTRICT | CASCADE]You can delete one or more tables at a time. You need to have drop permissions on the deleted table.Both the table definition

Grammar:Delete TableDROP table Syntaxdrop [temporary] table [IF EXISTS] tbl_name [, Tbl_name] ... [RESTRICT | CASCADE]You can delete one or more tables at a time. You need to have drop permissions on the deleted table. Both the table

"Use" online change chart"Note the risk" because it involves modifying the table's data and structure, so be careful to test and backup before use, the tool will not change the table by default, unless you add the--execute parameter"Introduction to

When you modify a schema by using the Pt-online-schema-change tool, a new table with the same structure as the original data table is created, and the data from the original table is progressively copied to the new table.For example, a ZS table with

Ru Zhiqiang said in "zookeeper", "Looking at Hongying again, it was not even a half-hour's work that would be delayed, and she never saw her eat a snack, at first glance, you will know that it is a person who will be careful and live." Some people

Summary:how to drop MySQL database tables and recreate them if you have foreign keyrelationships between the T Ables.This is pretty obscure, but I thought I ' d post it It's I wouldn ' t forget how to do this ... if you ever has a situatio n When

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Before explaining the system database, let's look at the evolution of MySQL in data dictionaries:MySQL4.1 provides a information_schema data

DDL: Data Definition languageCREATEAlterDROPThe main operations focus on databases and tables.Database:To create a database:CREATE datebase| SCHEMA [IF not EXISTS] dbnane [create_specification];Create_sepecification[DEFAULT] CHARACTER Set [=]

MySQL allows annotations to be used in SQL code. This is useful for reading code. MySQL server supports 3 kinds of annotation styles:1, "#" commentAll characters starting with the "#" character to the end of the line.Mysql> Select @schema; #which

Ext.: http://www.cnblogs.com/TsengYuen/archive/2012/01/11/2319034.htmlMySQL Common command lineMySQL often uses the command line Daquan, the start of MySQL work and stopnet stop MySQLnet start MySQLThis machine: mysql-u root-p Enter------> enter to