do database transactions prevent other users from interfering with it

Question

Suppose I do (note: the syntax below is probably not correct, but don\'t worry about it...it\'s just there to make a point)

Start Transaction
INSERT INTO tab         


        

Answer 1

The only users that get effect is those that require access to the same rows in a table. Otherwise the user will not be affected.

However is is slightly more complicated as the row locking can be a read lock or a write lock.

Here is an explanation for the InnoDB storage engine.