在MySQL中,什么是位字段表示法,以及如何使用它来编写位字段值?

数据库数据库 2023-08-31 03:39:22 1115
摘要: Syntaxb’value’OR0bvalueHere,thevalueisabinaryvaluewrittenbyusingzerosandones.ThemainlyBit-filednotationisconvenientforspecifyingvaluestobeassignedtoBITcolumns...

在MySQL中,什么是位字段表示法,以及如何使用它来编写位字段值?

Syntax

b’value’
  OR
0bvalue

Here, the value is a binary value written by using zeros and ones.

The mainly Bit-filed notation is convenient for specifying values to be assigned to BIT columns of MySQL table. Following example will demonstrate it −

mysql> Create table bit_testing (bittest BIT(8));
Query OK, 0 rows affected (1.09 sec)

mysql> INSERT INTO bit_testing SET bittest = b'10101010';
Query OK, 1 row affected (0.07 sec)

mysql> INSERT INTO bit_testing SET bittest = b'0101';
Query OK, 1 row affected (0.13 sec)

mysql> INSERT INTO bit_testing SET bittest = 0b0101;
Query OK, 1 row affected (0.10 sec)

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