Summary
To add two or more columns to a table at the same time, you use the following syntax:
ALTER TABLE table ADD [ COLUMN ] column_name_1 column_1_definition [ FIRST | AFTER existing_column], ADD [ COLUMN ] column_name_2 column_2_definition [ FIRST | AFTER existing_column], ...;
Let’s take a look some examples of adding a new column
How to Add Columns To A Table Using MySQL ADD COLUMN
mysqltutorial.org
Summary
The syntax to add a column in a table in MySQL (using the ALTER TABLE statement) is:
Let's look at an example that shows how to add a column in a MySQL table using the ALTER TABLE statement.
This MySQL ALTER TABLE example will add a column called last_name to the contacts table. It will be created as a NOT NULL column and will appear after the contact_id field in the table.
The syntax to add multiple columns in a table in MySQL (using the ALTER TABLE statement) is:
Let's look at an example that shows how to add multiple columns in a MySQL table using the ALTER TABLE statement
MySQL: ALTER TABLE Statement
techonthenet.com
Summary
This article provides a step-by-step guide on how to use the MySQL ADD COLUMN statement to alter tables or add multiple columns in tables. It explains how to specify the table name after ALTER TABLE, how to add a single column to an existing table, and how to check if a column is already present before adding a new one. It also provides examples of how to add a single column to an existing table.
How to :- Alter Table or Add Multiple Columns in Table? - MySQL - LookLinux
looklinux.com
Summary
ALTER TABLE operations are processed using either the COPY, INPLACE, or INSTANT algorithms, depending on the storage engine. The ALGORITHM clause is optional and requires the operation to use the specified algorithm for clauses and storage engines that support it. The ALGORITHM clause is used to prevent concurrent DML operations, but the ALGORITHM clause does not.
MySQL :: MySQL 8.0 Reference Manual :: 13.1.9 ALTER TABLE Statement
mysql.com
This SQL tutorial explains how to use the SQL ALTER TABLE statement to add a column, ... To add multiple columns to an existing table, the SQL ALTER TABLE ...
SQL: ALTER TABLE Statement
techonthenet.com
this tutorial, you will learn how to use the MySQL ALTER TABLE statement to add a column, ... To add multiple columns to a table, you use the following form ...
MySQL ALTER TABLE
mysqltutorial.org
