BIT_COUNT

bit_count

description

Syntax

BIT_COUNT(Integer-type x)

统计整型 x 的二的补码表示中 1 的个数。

整型可以是：TINYINT、SMALLINT、INT、BIGINT、LARGEINT

example

select "0b11111111", bit_count(-1)
--------------

+--------------+---------------+
| '0b11111111' | bit_count(-1) |
+--------------+---------------+
| 0b11111111   |             8 |
+--------------+---------------+

keywords

BITCOUNT, BIT_COUNT