Can databases have multiple tables?

Question

The majority of databases you'll work with as a developer will have more than one table, and those tables will be connected together in various ways to form table relationships.

Why do databases have multiple tables?

In many cases, it may be best to split information into multiple related tables, so that there is less redundant data and fewer places to update.

Can you have multiple tables in from SQL?

In SQL we can retrieve data from multiple tables also by using SELECT with multiple tables which actually results in CROSS JOIN of all the tables. The resulting table occurring from CROSS JOIN of two contains all the row combinations of the 2nd table which is a Cartesian product of tables.

Can a database have one table?

Yes, you can use a single-table relational database as if it were a NoSQL database.

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