adding column to all tables in a mysql database (unknown table names)

Question

I need to add a primary key to a set of tables in a given database. I do not know how many tables there will be or what their specific names are. They will all be of the for dat

Answer 1

If you want to fully script this, you can do something like this:

SELECT CONCAT('ALTER TABLE ',
table_schema,
'.',
table_name,
' ADD COLUMN id INT AUTO_INCREMENT NOT NULL PRIMARY KEY FIRST;') AS ddl
INTO OUTFILE '/tmp/alter_table.sql'
FROM information_schema.tables
WHERE table_schema = 'db_name' 
AND table_type = 'base table';

\. /tmp/alter_table.sql