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Anthony Rubino
Anthony Rubino
1,334 Points

SQL Playground - Stage 4 practice: Format Output with multiple conditions

In the SQL Playground - Stage 4 practice: Format Output task we are asked to format dates in all the loans table in the UK format without the year. Can i do this in one statement with multiple conditionals? Seems like i need to write a statement for each column since i need to check if the value is null first. Below is what i've used but i wonder if there is a more efficient method.

UPDATE loans SET loaned_on = STRFTIME("%d/%m", loaned_on) WHERE loaned_on IS NOT NULL; UPDATE loans SET return_by = STRFTIME("%d/%m", return_by) WHERE return_by IS NOT NULL; UPDATE loans SET returned_on = STRFTIME("%d/%m", returned_on) WHERE returned_on IS NOT NULL;

1 Answer

Steven Parker
Steven Parker
229,708 Points

I don't know any way to make the individual sets in a single UPDATE statement conditional on different tests. Are you sure that's a requirement of the exercise?

It might be helpful to provide a link the the course page you are working with.