MySQL Wildcards Tutorial
MySQL Wildcards are characters that can be used to search for data within a database. There are two types of wildcards: percentage (%) and underscore (_) The percentage wildcard will match any string of zero or more characters while the underscore will match any single character. For example if you wanted to find all customer records that began with the letter “a” you could use the following query:This would return all records where the last_name field started with the letter “a”. If you wanted to find all customer records that had a last_name of four letters and ended in “son” you could use the following query: SELECT * FROM customers WHERE last_name LIKE '____son';This would return all records where the last_name field was four characters long and ended in “son”.MySQL wildcards are useful for creating more flexible and powerful search queries. They allow you to search for data that matches a specific pattern rather than an exact value. In this tutorial we'll introduce the most common wildcards and show you how to use them in your queries.MySQL supports two Wildcards:The underscore (_) which represents a single character.The percent sign (%) which represents zero one or multiple characters.To understand how Wildcards work let's take a look at an example table called "Employees". This table has three columns: "FirstName" "LastName" and "Position".In this MySQL Wildcards tutorial we will learn about the various wildcards used in MySQL how to use them and their applications.MySQL provides two wildcard characters that can be used in string comparisons:The percent sign (%)The underscore (_)The percent sign represents zero one or multiple characters. The underscore represents a single character.Both of these wildcards can be used in combination with LIKE operator to perform pattern matching in a query.Wildcards are also useful for creating search strings. For example if you want to search for all employees whose first name starts with ‘A’ you can use the following query:SELECT * FROM employees WHERE first_name LIKE 'A%';This query will return all rows from the employees table where the first_name column starts with ‘A’.
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