Oxford, Cambridge and RSA (OCR) GCSE Computer Science Paper 2 Practice

The command that uses '%' to represent any combination of letters and numbers is indeed LIKE. This command is part of SQL (Structured Query Language) and is used in conjunction with the WHERE clause to filter results based on patterns.

The '%' wildcard can replace any sequence of characters, meaning you can use it to search for information that matches a specific pattern, which can include zero or more characters. For example, if you use `LIKE 'AB%'`, it will match any string that starts with 'AB', followed by any combination of characters. This makes LIKE particularly useful for searching varieties of text or when you want to find strings that conform to a specific format.

The other commands mentioned, such as WHERE, IN, and SELECT, do not utilize the '%' wildcard for pattern matching. WHERE is used to specify conditions for selecting records, IN checks if a value exists within a set of values, and SELECT is the command used to query data from a database. Therefore, their functionalities differ significantly from the pattern-matching capabilities that LIKE offers with the '%' wildcard.