Definition: The word 'query.xsql' refers to a SQL (Structured Query Language) query in Oracle, specifically for handling queries against an Oracle database. It allows you to execute SQL statements directly from the command line or via batch scripts. Definition: A query is an SQL statement that defines a SELECT clause, which retrieves data from a database table based on conditions specified by one or more clauses using JOIN, WHERE, GROUP BY, ORDER BY, and LIMIT clauses. Queries can also be used in conjunction with other statements (SELECT, FROM, JOIN) to define the structure of the database.