A temporary table in SQL Server, as the name suggests, is a database table that exists on the database server temporarily. It stores a subset of the normal table data for a certain period of time.
Temporary tables are particularly useful when you have a large number of records in a table and need to interact with small subsets of those records constantly. In such cases, instead of filtering the data again and again to fetch the subset, you can filter the data once, and store it in a temporary table. Then, you can execute queries on that temporary table.
Temporary tables are stored inside “tempdb,” which is a system database. Now, let’s take a look at how you can use temporary data in a simple scenario.