This is an example of SQL (Structured Query Language). It is used for communicating with databases. 'SELECT' is a request to get rows in a table. '*' is used to get all columns in that row. 'FROM users' means use the table users. 'WHERE clue > 0' is a statement telling what rows we want to select; in this case, rows where the column clue has a value greater than 0. When the database says '0 rows returned,' we know that no user has a clue.