Drop database if exists mysql

DROP DATABASE drops all tables in the database and deletes the database. Be very careful with this statement! One of my friends recently asked me question that how to drop table in exists in MySQL database ? It was not surprising to see that not many people know about the existence of this feature.

MySQL already has this feature for a while and if you. Therefore, you should be very careful when using this statement. IF NOT EXISTS is not definie USE is not defined. This is to ensure that the object to be dropped no longer exists on either the master or the slave, once the slave has caught up with the master.

How to create and drop database in MySQL? What is drop database in SQL? There’s not standard way to check if a MySQL user exists and based on that drop it. MySQL : Check if the user exists and drop it.

ALL_TABLES or USER_TABLE i. Python and MySQLdb - Using DROP TABLE IF EXISTS seems to throw exception. Schrödingers MySQL table: exists , yet it does not. Is it possible to check if a ( MySQL ) database exists after having made a connection. I know how to check if a table exists in a DB, but I need to check if the DB exists.

If not I have to call anot. If you drop a non-existing table with the IF EXISTS option, MySQL generates a NOTE, which can be retrieved using the SHOW WARNINGS statement. Note that the DROP TABLE statement only drops tables. It doesn’t remove specific user privileges associated with the tables. This MySQL tutorial explains how to use the MySQL DROP TABLE statement with syntax and examples.

As I have mentioned earlier, IF EXISTS in DROP statement can be used for several objects. In this article, I will provide examples of dropping objects like database , table, procedure, view and function, along with dropping columns and constraints. SELECT NULL FROM information_schema. Summary: in this tutorial, you will learn how to use the MySQL DROP VIEW statement to delete a view from the database. Introduction to the MySQL DROP VIEW statement.

Now you can check and drop the user if it exist. I am applying drop on user ‘Mac’. Hello Su Dylan, Thank you for the report and test case. Verified as described with 5. ALTER TABLE `app_config` DROP CONSTRAINT `FK_app_config` GO I figured out that in MySQL you just replace CONSTRAINT with FOREIGN KEY, like this: ALTER TABLE `app_config` DROP FOREIGN KEY `FK_app_config` but how do I check if the foreign key exists in the first place?

The query is as follows. SQL Server Drop Database If Exists. A database object is the main container in which other user defined objects are stored within.

This definition becomes crystal clear when you use Azure SQL Database. Requires the CONTROL permission on the database , or ALTER ANY DATABASE permission, or membership in the db_owner fixed database role.