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SQL Wildcards


A Wild card character can be utilized to substitute for some other character(s) in a string.


The % Wild card can be utilized on various occasions inside the equivalent pattern.

SQL Wildcard Characters

In SQL, special case characters are utilized with the SQL LIKE administrator.

SQL special cases are utilized to scan for information inside a table. 

With SQL, the special cases are:

Wildcard Description
% A substitute for at least zero characters
_ A substitute for a solitary character
[charlist] Sets and scopes of characters to match
[^charlist]
or
[!charlist]
Matches just a character NOT indicated inside the brackets

Database

In this instructional exercise we will utilize the outstanding database.

Below is a determination from the "Clients" table:

CustomerID FirstName Username Password Email Address
1

Mike Maier Porybouted ieZ6tei7ha MikeMaier@teleworm.us
2 Martina Jager Therstorted ejohKae5oh MartinaJager@jourrapide.com
3 Nadine Friedman Offece ieThodee0oo NadineFriedman@armyspy.com
4

Anna Bumgarner Laire1947 beeCh9thee. AnnaBumgarner@dayrep.com
5 Sabine Sanger Thertandet waexoof4Al SabineSanger@dayrep.com

Using the SQL % Wildcard

The following SQL proclamation chooses all clients with an Email beginning with "bar":

Example

SELECT * FROM Customers
WHERE Email LIKE 'bar%';

The following SQL proclamation chooses all clients with an Email containing the design "uk": 

Example

SELECT * FROM Customers
WHERE Email LIKE '%uk%';

Using the SQL _ Wildcard

The following SQL proclamation chooses all clients with an Email beginning with any character, trailed by "langu":

Example

SELECT * FROM Customers
WHERE Email LIKE '_langu';

The following SQL articulation chooses all clients with an Email beginning with "J", trailed by any character, trailed by "k", trailed by any character, pursued by "on":

Example

SELECT * FROM Customers
WHERE City LIKE 'J_k_on';

Using the SQL [charlist] Wildcard

The following SQL explanation chooses all clients with an Email beginning with "n", "p", or "m":

Example

SELECT * FROM Customers
WHERE City LIKE '[npm]%';

The following SQL explanation chooses all clients with an Email beginning with "x", "y", or "z":

Example

SELECT * FROM Customers
WHERE City LIKE '[x-z]%';

The following SQL explanation chooses all clients with an Email NOT beginning with "n", "p", or "q":

Example

SELECT * FROM Customers
WHERE Email LIKE '[!npq]%';

or

SELECT * FROM Customers
WHERE Email NOT LIKE '[npq]%';



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