21.
By default, the order by clause sorts the result set in the ________ order.
22.
To specify filtering condition for groups , the _____ clause is used in MySQL.
23.
The ________ function returns returns the total number of rows , including duplicates and NULL in a table.
24.
Group functions are also called as _________ functions.
25.
In MYSQL, ________ option causes a group function to consider only unique values.
