Page 111 - Computer Software Application TP - Volume 1
P. 111
COMPUTER SOFTWARE APPLICATION - CITS
3 Right Join – Retrieve all rows from the right table and the matching rows from the left table.
SELECT * FROM employee
RIGHT JOIN department ON employee.department id = department.department id;
4 Full Outer Join(Using UNION) - Retrieve all rows when there is a match in either the left or the right table.
SELECT * FROM employee
LEFT JOIN department ON employee.department id = department.department id
UNION
SELECT * FROM employee
RIGHT JOIN department ON employee.department id = department.department id;
5 Self Join - Perform a join on a table with itself.
SELECT e1.employee id, e1.employee name, e2.employee name AS manager name
FROM employee e1
INNER JOIN employee e2 ON e1.department id = e2.department id AND e1.employee id != e2.employee id;
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CITS : IT & ITES - Computer Software Application - Exercise 29 CITS : IT & ITES - Computer Software Application - Exercise 29
