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Factless fact table
There are different types of fact tables in a data warehouse, such as Transaction, Periodic Snapshot, and Accumulating Transactions. However, a Factless fact table is distinct from other fact tables…
How to delete duplicate rows from a table in SQL
Duplicate records can result in unintended outcomes when working with data. Despite data professionals disliking it, this issue is often encountered in data warehouse systems. When loading data from sources…
Impact of using local variable in Stored Procedure
Preparing an optimal execution plan for a given SQL query is crucial, and the Query Optimizer’s ability to do so heavily relies on the accuracy and freshness of the statistics…
Additive, non-additive and semi additive facts in data warehouse fact table
In a data warehouse fact table, fact can be classified as additive, semi additive or non-additive based on their characteristics. Additive facts are measures that can be aggregated by ALL…
DROP multiple tables using a single DROP statement
The DROP TABLE command can also be used to drop multiple tables in a single statement. Example, Separate each table with a comma in the DROP TABLE statement to drop…