• answere is 28 rows

    here there is no logic just thinking

    like this way

    first step first persion enter to the database

    in second step second persion enter to the database

    in third step william sees 12 rows in the toys table that means toys table contain

    12 rows

    in fourt step third persion log on to the same database

    in fifth step second persion sees 12 rows in the toys table that time also toys table

    contains 12 rows

    in sixth step first persion insert 2 rows into the toyps table that time toys table

    contain 14 rows

    in sevents step second persion insert 14 rows into the toys table that time toys table

    contain 28 rows

    in eighth step second persion issues the commit that means all rows are commit

    so 28 rows are commit in toys table

    in ninth step first pesion issue rollback that time also 28 rows avilable in toys table

    in 10th step third persion look to toys table that time he sees 28 rows in toys table