विश्व का सबसे बड़ा हिंदी वेब डेवलपर साइट


The WHERE clause is used to filter records.

The SQL WHERE Clause 

The WHERE clause is used to extract only those records that fulfill a specified criterion.


SELECT column_name,column_name
FROM table_name
WHERE column_name operator value;

Demo Database

In this tutorial we will use the well-known Northwind sample database.

Below is a selection from the "Customers" table:

CustomerID CustomerName ContactName Address City PostalCode Country

Alfreds Futterkiste Maria Anders Obere Str. 57 Berlin 12209 Germany
2 Ana Trujillo Emparedados y helados Ana Trujillo Avda. de la Constituci??n 2222 M??xico D.F. 05021 Mexico
3 Antonio Moreno Taquer??a Antonio Moreno Mataderos 2312 M??xico D.F. 05023 Mexico

Around the Horn Thomas Hardy 120 Hanover Sq. London WA1 1DP UK
5 Berglunds snabbk??p Christina Berglund Berguvsv??gen 8 Lule?? S-958 22 Sweden

WHERE Clause Example

The following SQL statement selects all the customers from the country "Mexico", in the "Customers" table:


SELECT * FROM Customers
WHERE Country='Mexico';
Try it yourself »

Text Fields vs. Numeric Fields

SQL requires single quotes around text values (most database systems will also allow double quotes).

However, numeric fields should not be enclosed in quotes:


SELECT * FROM Customers
WHERE CustomerID=1;
Try it yourself »

Operators in The WHERE Clause

The following operators can be used in the WHERE clause:

Operator Description
= Equal
<> Not equal. Note: In some versions of SQL this operator may be written as !=
> Greater than
< Less than
>= Greater than or equal
<= Less than or equal
BETWEEN Between an inclusive range
LIKE Search for a pattern
IN To specify multiple possible values for a column