mysql union every derived table must have its own alias

Mysql union every derived table must have its own alias how to#

Drop a Trigger DROP TRIGGER trigger_name Stored Procedures 1. Create a Trigger CREATE TRIGGER trigger_name trigger_time trigger_event Deleting a View DROP VIEW View_name Triggers 1.

Mysql union every derived table must have its own alias how to#

How to call view SELECT * FROM View_name 3. DROP INDEX DROP INDEX index_name ON table_name Views 1. CREATE INDEX CREATE INDEX index_name on table_name(column_name) ĬREATE UNIQUE INDEX index_name on table_name(column_name) 2. DELETE DELETE FROM table_name where condition Example DELETE from EMPLOYEE where empId='0001' Indexes 1. WHERE condition Example UPDATE EMPLOYEE SET dept = 'Sales' WHERE empId='0001' 4. Example SELECT * FROM EMPLOYEE where dept ='sales' 3. Example INSERT INTO EMPLOYEE VALUES (0001, 'Ava', 'Sales') 2. INSERT INSERT INTO table_name (column1, column2, column3. COMMENT Single-Line Comments: -Line1 Multi-Line comments: /* Line1, RENAME RENAME TABLE table_name1 to new_table_name1 6. ALTER ALTER TABLE Table_name ADD column_name datatype Example INSERT INTO EMPLOYEE VALUES (0001, 'Dave', 'Sales') 3. Supports many operating systems like Linux*,CentOS*, Solaris*,Ubuntu*,Windows*, MacOS*,FreeBSD* and others.High productivity as it uses stored procedures, triggers, views to write a highly productive code.Reliable, very fast and easy to use database server.Open-source relational database management systems.MySQL is a open-source, free and very popular relational database management system which is developed, distributed and supported by Oracle corporation. The editor shows sample boilerplate code when you choose language as 'MySQL' and start writing queries to learn and test online without worrying about tedious process of installation. Getting started with the OneCompiler's MySQL editor is really simple and pretty fast. It's one of the robust, feature-rich online editor and compiler for MySQL. Write, Run & Share MySQL queries online using OneCompiler's MySQL online editor and compiler for free.