The .sql files extensions are majorly related to Structured Query Language (SQL). The SQL files are the text files that are written in the SQL (Structured Query Language) and contain SQL code that is used to modify the contents of a relational database. They might contain instructions and statements for creating a database or making the modifications to the database such as insertions, updates, deletions, or other SQL operations. SQL files can be read by any SQL-compatible database program including FileMaker, Microsoft Access, and MySQL. They can be edited using any text editor.