/* 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 ...
IFNULL is a MySQL variant (also used in other DBs) which takes only 2 arguments and returns the first one that is not null. Closes: #35749 ...
operand is one of the following: constant is a number or a quoted character string (or other special notation) that indicates a fixed value. Constants are also called literals. Constants are described ...
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