Can two tables join without foreign key?

Is a foreign key required in all tables?

Note that foreign keys are not mandatory, and a table may have no foreign keys. Conversely, every column in a table may have a foreign key constraint.

Can you join two tables without using the keyword join?

Yes, Tables Can Be Joined Without the JOIN Keyword As you have just seen, it's not always necessary to use the JOIN keyword to combine two tables in SQL. You can replace it with a comma in the FROM clause then state your joining condition in the WHERE clause.

How can I join three tables without foreign key?

JOIN Tables Without Foreign Key In SQL Server1Create three SQL tables in SQL Server 2014 or higher. I have created 3 tables as mentioned below with their respective code.2Step 2 - Insert some demo data to all three tables. Insert records into the employee table. /*INESRT VALUES IN EMPLOYEE TABLE*/