Mysql Archives - Page 2 of 2 - 7-Views
Insert into a MySQL table or update if exists
I we want to add a row to a database table, but if a row exists with the same unique key we want to update the row. For example Let’s say the unique key is employee_id, and in my database there is a row with employee_id=1 , In that case we want to update that […]
Row Level Locking in MySql
We need row level locking to handle the concurrent or simultaneous requests in proper way. MyISAM does not supports row level locking. Why we need row level locking? Suppose two bank clerks attempting to update the same bank account for two different transactions. Clerks 1 and 2 both retrieve (i.e., copy) the account’s record. Clerk […]