What command tells the database which tables to query?

In SQL, the appropriate command to specify which tables to query is 'FROM'. This command is essential in a SQL query structure, as it indicates the source of the data that you want to retrieve. When you use 'SELECT', you are simply indicating which columns of data you want to display, but without 'FROM', there would be no context regarding where that data is coming from.

The use of 'FROM' effectively links the selected data with the specific tables you're querying, making it crucial for proper SQL syntax and operation. While commands like 'SELECT' allow you to specify the data you want, 'FROM' clarifies the origin of that data. In conclusion, 'FROM' plays a key role in directing the database to the right tables for the query's operation.