Nth Highest Salary
put limit N, 1 not N-1
it's remarkable. thanks!
ifnull seems to be redundant
It's not clear why you had to use another variable M and set to N-1, rather than just using N-1 directly in the limit clause. I know that causes an error, but why exactly?
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w3c sql top
guess you cannot do calculations within "LIMIT x,y"
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