Adding multiple columns AFTER a specific column in MySQL
ALTER TABLE users ADD COLUMN count SMALLINT(6) NOT NULL, ADD COLUMN log VARCHAR(12) NOT NULL, ADD COLUMN status INT(10) UNSIGNED NOT NULL AFTER …
mysql - Adding new enum column to an existing table - Stack …
May 9, 2015 · Mysql Add a new value to a column of data type enum. 11. Removing enum values from mysql column. 77. MySQL ...
mysql - Column calculated from another column? - Stack Overflow
Mar 30, 2015 · Generated Column is one of the good approaches for MySQL version 5.7.6 and above. There are two kinds of Generated Columns: Virtual (default) - column will be calculated …
mysql - Adding a new SQL column with a default value - Stack …
Jan 30, 2014 · column_definition clauses use the same syntax for ADD and CHANGE as for CREATE TABLE. See Section 12.1.17, “CREATE TABLE Syntax”. And from the linked page:
mysql - How to add 'created_at' and 'updated_at' columns
May 30, 2018 · To add the columns to an already existing table you can use: ALTER TABLE t1 ADD COLUMN created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP, ADD COLUMN …
How do I add indexes to MySQL tables? - Stack Overflow
ADD INDEX (col), better use the ALTER ... ADD INDEX col (col) statement, see the accepted answer and the comment under the one that uses only ADD INDEX (col). At least, when using …
mysql - Add Auto-Increment ID to existing table? - Stack Overflow
Feb 7, 2013 · ALTER TABLE `tableName` ADD COLUMN `id` BIGINT(11) NOT NULL FIRST; Then modify the column with auto-increment (thanks php). It needs to be a primary key: …
MySQL: ALTER TABLE if column not exists - Stack Overflow
Jul 4, 2014 · possible duplicate of MySQL add column if not exist – Rikesh. Commented Jul 4, 2014 at 10:02. 1.
add column to mysql table if it does not exist
Below are the Stored procedure in MySQL To Add Column(s) in different Table(s) in different Database(s) if column does not exists in a Database(s) Table(s) with following advantages. …
How to set initial value and auto increment in MySQL?
Dec 30, 2014 · ALTER TABLE `users` -- 1. Set the auto-increment value, before anything uses it AUTO_INCREMENT=1001, -- 2. Set the column's default value, before it is constrained …