/* In order to show example of IFNULL or COALESCE, we would need NULL values in our dataset. So, I have decieded to change dep_duplicate table. */ Alter table dep_duplicate change column dept_name ...
Handwritten SQL exercise focused on NULL handling techniques such as COALESCE, ISNULL, and IFNULL. Demonstrates practical data cleaning skills and understanding of how to manage missing values in real ...
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