Question 6 :
A transaction is the complete set of closely related update commands that must all be done, or none of them done, for the database to remain valid.
Question 7 :
When AUTOCOMMIT is set on, changes will be made automatically at the end of each SQL statement.
Question 8 :
The UNION clause is used to combine the output from multiple queries together into a single result table.
Question 9 :
ROLLBACK WORK asks SQL to empty the log file.
Question 10 :
The most frequently used relational operation, which brings together data from two or more related tables into one resultant table, is called an equi-join.