<-- Chapter 15: SQL <= Operator
Chapter 16
SQL And & Or
AND/OR Operators are used in SQL statements to filter the Records based on more than one condition. AND Operator display the records in which all the specified conditions are TRUE. OR Operator display the records in which any one of the condition is TRUE
Lets see an example from the below table "employees" :-
employee_id |
name |
code |
designation |
salary |
101 |
ABC |
E-101 |
Engineer |
12000 |
102 |
DEF |
E-102 |
Doctor |
8000 |
103 |
GHI |
E-103 |
Software Developer |
8000 |
104 |
JKL |
E-104 |
CEO |
12000 |
105 |
MNO |
E-105 |
Software Developer |
100000 |
AND SQL Statement Example :-
SELECT *
FROM `employees`
WHERE `name` = 'ABC' AND `name` = 'MNO' ;
Now Run this Query, we will see the output below :-
employee_id |
name |
code |
designation |
salary |
101 |
ABC |
E-101 |
Engineer |
12000 |
105 |
MNO |
E-105 |
Software Developer |
100000 |
We can see here, that only those records are displayed which column name values matches 'ABC' and 'MNO'.
OR SQL Statement Example :-
SELECT *
FROM `employees`
WHERE `name` = 'DEF' OR `name` = 'PQR' ;
Now Run this Query, we will see the output below :-
employee_id |
name |
code |
designation |
salary |
102 |
DEF |
E-102 |
Doctor |
8000 |
We can see here, that only those records are displayed which column name values matches either 'DEF' or 'PQR'.
Chapter 17: SQL ORDER BY -->
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