Name
BIT_AND()
Synopsis
BIT_AND(expression)This function returns the bitwise AND for
all bits for the expression given. Use this in conjunction with the
GROUP BY clause. The function
has a 64-bit precision. If there are no matching rows, before version
4.0.17 of MySQL, –1 is returned. Newer versions return
18446744073709551615, which is the value of 1 for all bits of an
unsigned BIGINT column.
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