GROUP BY
Exercise #70
Database «Ships»
GROUP BY clause
Getting summarizing values
Simple SELECT statement
SELECT statement
CASE statement in GROUP BY clause
About the use of the operator CASE
Exercise #37
Database «Ships»
Exercise #59
Database «Recycled materials company»
HAVING clause
Getting summarizing values
CASE statement in HAVING clause
About the use of the operator CASE
Exercise #(-2)
Database «Ships»
Exercise #27
Computer Firm Database