BIT_AND

Syntax

BIT_AND(expr) [over_clause]

Description

Returns the bitwise AND of all bits in expr. The calculation is performed with 64-bit (BIGINT) precision. It is an aggregate function, and so can be used with the GROUP BY clause.

If no rows match, BIT_AND will return a value with all bits set to 1. NULL values have no effect on the result unless all results are NULL, which is treated as no match.

BIT_AND can be used as a window function with the addition of the over_clause.

Examples

CREATE TABLE vals (x INT);  INSERT INTO vals VALUES(111),(110),(100);  SELECT BIT_AND(x), BIT_OR(x), BIT_XOR(x) FROM vals; +------------+-----------+------------+ | BIT_AND(x) | BIT_OR(x) | BIT_XOR(x) | +------------+-----------+------------+ | 100 | 111 | 101 | +------------+-----------+------------+

As an aggregate function:

CREATE TABLE vals2 (category VARCHAR(1), x INT);  INSERT INTO vals2 VALUES  ('a',111),('a',110),('a',100),  ('b','000'),('b',001),('b',011);  SELECT category, BIT_AND(x), BIT_OR(x), BIT_XOR(x)   FROM vals GROUP BY category; +----------+------------+-----------+------------+ | category | BIT_AND(x) | BIT_OR(x) | BIT_XOR(x) | +----------+------------+-----------+------------+ | a | 100 | 111 | 101 | | b | 0 | 11 | 10 | +----------+------------+-----------+------------+

No match:

SELECT BIT_AND(NULL); +----------------------+ | BIT_AND(NULL) | +----------------------+ | 18446744073709551615 | +----------------------+

See Also

• BIT_OR

• BIT_XOR

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