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Syntax:
CRC32(expr)
Computes a cyclic redundancy check value and returns a 32-bit unsigned
value. The result is NULL if the argument is NULL. The argument is
expected to be a string and (if possible) is treated as one if it is
not.
URL: https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html
Example
mysql> SELECT CRC32('MySQL');
-> 3259397556
mysql> SELECT CRC32('mysql');
-> 2501908538
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