Why do Bloom filters use multiple hash functions?

Why do Bloom filters use multiple hash functions

Sep.06,2021
The problem with

Hash is conflict. Assuming that the Hash function is good, if our bit array length is m points, then if we want to reduce the collision rate to, say, 1%, this hash table can only hold mbank 100 elements. Obviously this is not called space efficiency (Space-efficient). The solution is also simple: use multiple Hash, if one of them says that the element is not in the collection, it is definitely not there. If they all say yes, although there is a possibility that they are lying, the probability of intuitively judging this kind of thing is relatively low.
-- excerpt from https://www.cnblogs.com/bonel.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b331a5-4eacf.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b331a5-4eacf.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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