(SQL Example for Citizen Data Scientist & Business Analyst)
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:
- 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 - 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:
- 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 - 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:
- 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 |
Learn to Code SQL Example – SQL | AND and OR operators
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