SQL | AND and OR operators

In SQL, the AND & OR operators are used for filtering the data and getting precise result based on conditions.

• The AND and OR operators are used with the WHERE clause.
• These two operators are called conjunctive operators.

AND Operator : This operators displays only those records where both the conditions condition1 and condition2 evaluates to True.

OR Operator: This operators displays the records where either one of the conditions condition1 and condition2 evaluates to True. That is, either condition1 is True or condition2 is True.

AND Operator

Basic Syntax:

SELECT * FROM table_name WHERE condition1 AND condition2 and ...conditionN;

table_name: name of the table
condition1,2,..N : first condition, second condition and so on

Sample Queries:

1. To fetch all the records from Student table where Age is 18 and ADDRESS is Delhi.

   SELECT * FROM Student WHERE Age = 18 AND ADDRESS = 'Delhi';
   

   Output:

   ROLL_NO	NAME	ADDRESS	PHONE	Age
   1	Ram	Delhi	XXXXXXXXXX	18
   4	SURESH	Delhi	XXXXXXXXXX	18

2. To fetch all the records from Student table where NAME is Ram and Age is 18.

   SELECT * FROM Student WHERE Age = 18 AND NAME = 'Ram';
   

   Output:

   ROLL_NO	NAME	ADDRESS	PHONE	Age
   1	Ram	Delhi	XXXXXXXXXX	18

OR Operator

Basic Syntax:

SELECT * FROM table_name WHERE condition1 OR condition2 OR... conditionN;

table_name: name of the table
condition1,2,..N : first condition, second condition and so on

Sample Queries:

1. To fetch all the records from Student table where NAME is Ram or NAME is SUJIT.

   SELECT * FROM Student WHERE NAME = 'Ram' OR NAME = 'SUJIT';
   

   Output:

   ROLL_NO	NAME	ADDRESS	PHONE	Age
   1	Ram	Delhi	XXXXXXXXXX	18
   3	SUJIT	ROHTAK	XXXXXXXXXX	20
   3	SUJIT	ROHTAK	XXXXXXXXXX	20

2. To fetch all the records from Student table where NAME is Ram or Age is 20.

   SELECT * FROM Student WHERE NAME = 'Ram' OR Age = 20;
   

   Output:

   ROLL_NO	NAME	ADDRESS	PHONE	Age
   1	Ram	Delhi	XXXXXXXXXX	18
   3	SUJIT	ROHTAK	XXXXXXXXXX	20
   3	SUJIT	ROHTAK	XXXXXXXXXX	20

Combining AND and OR

You can combine AND and OR operators in below manner to write complex queries.
Basic Syntax:

SELECT * FROM table_name WHERE condition1 AND (condition2 OR condition3);

Sample Queries:

1. To fetch all the records from Student table where Age is 18 NAME is Ram or RAMESH.

SELECT * FROM Student WHERE Age = 18 AND (NAME = 'Ram' OR NAME = 'RAMESH');

Output:

ROLL_NO	NAME	ADDRESS	PHONE	Age
1	Ram	Delhi	XXXXXXXXXX	18
2	RAMESH	GURGAON	XXXXXXXXXX	18

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