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What does the SQL LIKE operator do?

Question

What does the SQL LIKE operator do?

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Solution

The SQL LIKE operator is used in a WHERE clause to search for a specified pattern in a column.

Here are the steps of how it works:

  1. Specify the column where you want to search for a pattern. For example, if you have a "Customers" table and you want to find all customers whose names start with "A", you would specify the "CustomerName" column.

  2. Use the LIKE operator in your WHERE clause. Following the previous example, your SQL statement would now look like this: "SELECT * FROM Customers WHERE CustomerName LIKE ..."

  3. Specify the pattern you're searching for. In SQL, you use "%" to represent any sequence of characters and "_" to represent a single character. So, if you're looking for customers whose names start with "A", you would use 'A%'. Your complete SQL statement would be: "SELECT * FROM Customers WHERE CustomerName LIKE 'A%'".

This will return all customers whose names start with "A". If you wanted to find customers whose names have "A" as the second letter, you would use '_A%'. If you wanted to find customers whose names end with "A", you would use '%A'.

So, in summary, the SQL LIKE operator allows you to search for a specified pattern in a column of a table.

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