mysql create database if not exists
The IF NOT EXISTS is an optional clause of the statement. The IF NOT EXISTS clause prevents you from an error of creating a new database that already exists ... ,CREATE SCHEMA is a synonym for CREATE DATABASE . An error occurs if the database exists and you did not specify IF NOT EXISTS . CREATE DATABASE ... ,Second, to avoid an error in case you accidentally create a database that already exists, you can specify the IF NOT EXISTS option. In this case, MySQL does not ... ,CREATE SCHEMA is a synonym for CREATE DATABASE . An error occurs if the database exists and you did not specify IF NOT EXISTS . CREATE DATABASE ... ,Here is the example in a helper (permanent) database. That db's name is permanent. One time db create: create schema permanent;. Now make sure you , There's not really a direct way to achieve this, but you could try that: when you dump your database, pass --no-create-db to mysql dump.,Just do a simple mysql_select_db() and if the result is false then proceed with the creation. As an example, check out the first answer here by another very smart ... ,If you just need to know if a db exists so you won't get an error when you try to create it, simply use (From here): CREATE DATABASE IF NOT EXISTS DBName;.
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 mysql create database if not exists 相關參考資料
Manage Databases in MySQL - MySQL Tutorial
The IF NOT EXISTS is an optional clause of the statement. The IF NOT EXISTS clause prevents you from an error of creating a new database that already exists ... http://www.mysqltutorial.org MySQL 5.7 Reference Manual :: 13.1.11 CREATE DATABASE Syntax
CREATE SCHEMA is a synonym for CREATE DATABASE . An error occurs if the database exists and you did not specify IF NOT EXISTS . CREATE DATABASE ... https://dev.mysql.com MySQL CREATE DATABASE - Creating a New Database in MySQL
Second, to avoid an error in case you accidentally create a database that already exists, you can specify the IF NOT EXISTS option. In this case, MySQL does not ... http://www.mysqltutorial.org MySQL 8.0 Reference Manual :: 13.1.12 CREATE DATABASE Syntax
CREATE SCHEMA is a synonym for CREATE DATABASE . An error occurs if the database exists and you did not specify IF NOT EXISTS . CREATE DATABASE ... https://dev.mysql.com MySQL create database if not exist - Stack Overflow
Here is the example in a helper (permanent) database. That db's name is permanent. One time db create: create schema permanent;. Now make sure you https://stackoverflow.com MySQL CREATE DATABASE IF NOT EXISTS argument in command line ...
There's not really a direct way to achieve this, but you could try that: when you dump your database, pass --no-create-db to mysql dump. https://stackoverflow.com Php mysql create database if not exists - Stack Overflow
Just do a simple mysql_select_db() and if the result is false then proceed with the creation. As an example, check out the first answer here by another very smart ... https://stackoverflow.com How to check if mysql database exists - Stack Overflow
If you just need to know if a db exists so you won't get an error when you try to create it, simply use (From here): CREATE DATABASE IF NOT EXISTS DBName;. https://stackoverflow.com |