PL/SQL Terms

1. SQL
   SQL is an English like language consisting of commands to store, retrieve, maintain & regulate access to your database.
     

2. Deadlock
   Deadlock is a unique situation in a multi user system that causes two or more users to wait indefinitely for a locked resource. First user needs a resource locked by the second user and the second user needs a resource locked by the first user. To avoid dead locks, avoid using exclusive table lock and if using, use it in the same sequence and use Commit frequently to release locks.