Adding a new SQL column with a default value

Question

I am looking for the syntax to add a column to a MySQL database with a default value of 0

Reference

Answer 1

table users (user_id int unsigned PK, username varchar(32))

alter table users add column verified tinyint unsigned default 0

Answer 2

This will work for ENUM type as default value

ALTER TABLE engagete_st.holidays add column `STATUS` ENUM('A', 'D') default 'A' AFTER `H_TYPE`;

Answer 3

If you are learning it's helpful to use a GUI like SQLyog, make the changes using the program and then see the History tab for the DDL statements that made those changes.

Answer 4

Another useful keyword is FIRST and AFTER if you want to add it in a specific spot in your table.

ALTER TABLE `table1` ADD COLUMN `foo` AFTER `bar` INT DEFAULT 0;

Answer 5

Simply add default 0 at the end of your ALTER TABLE <table> ADD COLUMN <column> <type> statement

Answer 6

Like this?

ALTER TABLE `tablename` ADD `new_col_name` INT NOT NULL DEFAULT 0;