Question

I have a table which is created from the result of a SELECT clause. Is there a way to add autoincrement primary key to each row (eg 1, 2, 3,…) My query looks like this:

CREATE TABLE tableA As( SELECT...some queries);

I tried to use:

ALTER TABLE tableA  ADD PRIMARY KEY (int NOT NULL AUTO_INCREMENT);

..but it didn´t work.

Answer 1

In MySQL you can execute this query:

ALTER TABLE tableA ADD COLUMN id INT NOT NULL AUTO_INCREMENT,
ADD PRIMARY KEY (id);