SQL Wildcards

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SQL Wildcards
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SQL Wildcard Characters
A wildcard character is used to substitute any other character(s) in a string.

Wildcard characters are used with the SQL LIKE operator. The LIKE operator is used in a WHERE clause to search for a specified pattern in a column.

There are two wildcards used in conjunction with the LIKE operator:

% - The percent sign represents zero, one, or multiple characters
_ - The underscore represents a single character
Note: MS Access uses a question mark (?) instead of the underscore (_).

In MS Access and SQL Server you can also use:

[charlist] - Defines sets and ranges of characters to match
[^charlist] or [!charlist] - Defines sets and ranges of characters NOT to match
The wildcards can also be used in combinations!

Here are some examples showing different LIKE operators with '%' and '_' wildcards:

LIKE Operator Description
WHERE CustomerName LIKE 'a%' Finds any values that starts with "a"
WHERE CustomerName LIKE '%a' Finds any values that ends with "a"
WHERE CustomerName LIKE '%or%' Finds any values that have "or" in any position
WHERE CustomerName LIKE '_r%' Finds any values that have "r" in the second position
WHERE CustomerName LIKE 'a_%_%' Finds any values that starts with "a" and are at least 3 characters in length
WHERE ContactName LIKE 'a%o' Finds any values that starts with "a" and ends with "o"
Demo Database
Below is a selection from the "Customers" table in the Northwind sample database:

CustomerID CustomerName ContactName Address City PostalCode Country
1

Alfreds Futterkiste Maria Anders Obere Str. 57 Berlin 12209 Germany
2 Ana Trujillo Emparedados y helados Ana Trujillo Avda. de la Constitución 2222 México D.F. 05021 Mexico
3 Antonio Moreno Taquería Antonio Moreno Mataderos 2312 México D.F. 05023 Mexico
4

Around the Horn Thomas Hardy 120 Hanover Sq. London WA1 1DP UK
5 Berglunds snabbköp Christina Berglund Berguvsvägen 8 Luleå S-958 22 Sweden
Using the % Wildcard
The following SQL statement selects all customers with a City starting with "ber":

Example
SELECT * FROM Customers
WHERE City LIKE 'ber%';
»
The following SQL statement selects all customers with a City containing the pattern "es":

Example
SELECT * FROM Customers
WHERE City LIKE '%es%';
»
Using the _ Wildcard
The following SQL statement selects all customers with a City starting with any character, followed by "erlin":

Example
SELECT * FROM Customers
WHERE City LIKE '_erlin';
»
The following SQL statement selects all customers with a City starting with "L", followed by any character, followed by "n", followed by any character, followed by "on":

Example
SELECT * FROM Customers
WHERE City LIKE 'L_n_on';
»
Using the [charlist] Wildcard
The following SQL statement selects all customers with a City starting with "b", "s", or "p":

Example
SELECT * FROM Customers
WHERE City LIKE '[bsp]%';
»
The following SQL statement selects all customers with a City starting with "a", "b", or "c":

Example
SELECT * FROM Customers
WHERE City LIKE '[a-c]%';
»
Using the [!charlist] Wildcard
The two following SQL statements selects all customers with a City NOT starting with "b", "s", or "p":

Example
SELECT * FROM Customers
WHERE City LIKE '[!bsp]%';
»
Or:

Example
SELECT * FROM Customers
WHERE City NOT LIKE '[bsp]%';
»

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