SQL LIKE Operator

The SQL LIKE function, with its wildcards, is used to match patterns in queries. Allows you to search for values ​​that match a specific pattern in a column. This is useful when you want to see a partial similarity between data or records in a particular sample.

Wildcards used are ‘LIKE’

‘%’- Represents zero or more characters. For example, LIKE 'A%' matches any value starting with 'A'.

‘%%’- Represents zero or more characters. e.g. LIKE ‘%A%’ matches all values that contain ‘A’ 
‘_’ - Represents a single character. For example, LIKE 'A_ _' matches any three-character value beginning with 'A'.

‘[]’- Represents any single character within the brackets.

‘^’- Represents any character not within the brackets.

Example- 

This query retrieves all the rows from the People table that contains ‘A’ in the column FirstName

Also, Read: What are SQL Clauses and Operators?