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MySQL: ALTER TABLE if column not exists

mysql ddl alter-table

ALTER TABLE ADD COLUMN IF NOT EXISTS in SQLite

sqlite alter-table

Adding a column as a foreign key gives ERROR column referenced in foreign key constraint does not exist

ALTER TABLE without locking the table?

sql mysql ddl alter-table

add column to mysql table if it does not exist

mysql ddl alter-table

Alter MySQL table to add comments on columns

mysql alter-table

Create an index on a huge MySQL production table without table locking

insert a NOT NULL column to an existing table

How do I alter the position of a column in a PostgreSQL database table?

How to change MySQL column definition?

mysql alter-table

How to alter a column's data type in a PostgreSQL table?

sqlite alter table add MULTIPLE columns in a single statement

sql sqlite alter-table

Postgresql - change the size of a varchar column to lower length

Can I create a named default constraint in an add column statement in SQL Server?

How do I add more members to my ENUM-type column in MySQL?

mysql enums alter-table

Alter column, add default constraint

ALTER TABLE to add a composite primary key

Alter a MySQL column to be AUTO_INCREMENT

sql mysql alter-table

How can I add a column that doesn't allow nulls in a Postgresql database?

sql postgresql alter-table

SQL Server add auto increment primary key to existing table