Which command is used to remove data from a database?

The command used to remove data from a database is DELETE. This command is part of SQL (Structured Query Language) and is specifically designed to delete one or more rows from a table based on a specified condition. By using a WHERE clause, you can precisely control which records are removed. If no condition is specified, the DELETE command will remove all rows from the table, although the table structure itself remains intact.

The other options, while they may seem related to data removal, have different functions in SQL. DROP is utilized to remove entire database objects like tables, views, or databases, thereby eliminating both the structure and the data contained within. REMOVE is not a standard SQL command, making it invalid in this context. CLEAR, similarly, does not exist as a SQL command for deleting data, thus highlighting the importance of using the correct terminology in database management.