INTERVAL(N,N1,N2,N3,...)

Returns the index of the last argument that is less than the first argument or is NULL.

Returns 0 if N < N1, 1 if N < N2, 2 if N < N3 and so on or -1 if N is NULL. All arguments are treated as integers. It is required that N1 < N2 < N3 < ... < Nn for this function to work correctly. This is because a fast binary search is used.

SELECT INTERVAL(23, 1, 15, 17, 30, 44, 200); +--------------------------------------+ | INTERVAL(23, 1, 15, 17, 30, 44, 200) | +--------------------------------------+ | 3 | +--------------------------------------+ SELECT INTERVAL(10, 1, 10, 100, 1000); +--------------------------------+ | INTERVAL(10, 1, 10, 100, 1000) | +--------------------------------+ | 2 | +--------------------------------+ SELECT INTERVAL(22, 23, 30, 44, 200); +-------------------------------+ | INTERVAL(22, 23, 30, 44, 200) | +-------------------------------+ | 0 | +-------------------------------+ SELECT INTERVAL(10, 2, NULL); +-----------------------+ | INTERVAL(10, 2, NULL) | +-----------------------+ | 2 | +-----------------------+

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https://mariadb.com/kb/en/interval/