General MySQL Oracle SQL Server

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ISNULL() - Detecting NULL Value
How to detect a NULL value using the ISNULL() function? ISNULL(val) is a MySQL built-in function that returns 1 if the given value is NULL, 0 otherwise. For example: SELECT ISNULL(1+1); -- +-------------+ -- | ISNULL(1+1) | -- +-------------+ -- | 0 | -- +-------------+ SELECT ISNULL(1/0); -- +-----... 2026-07-13, 1462🔥, 0💬

PERCENT_RANK() - Rank Percentage of Sorted Values
How to calculate the rank percentage of the sorting field expression in the current result set window using the PERCENT_RANK() function? PERCENT_RANK(n) is a MySQL built-in window function that calculates the rank percentage of the sorting field expression in the current result set window. For examp... 2024-09-12, 1451🔥, 0💬

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General MySQL Oracle SQL Server