In SQL, APPLY operator is like a join clause and it allows joining between two table expressions i.e. joining a left table expression with a right table expression.
In SQL Server, A temporary table in SQL Server, as the name suggests, is a database table that exists temporarily on the database server.
A foreign key in a table is a column that points to a primary key column in another table.
RDBMS is a software system which is used to store only data which need to be stored in the form of tables.
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