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The CRC32 SQL Function in MySQL and MariaDB - CRC value calculation

CRC32	Syntax:	CRC32(String)
	Return value:	INTEGER
	Function type:	Numeric function

Function Description

The CRC32() function calculates a CRC value (Cyclic Redundancy Check) from "String" and returns an unsigned 32-bit value.

If the value of "String" is NULL, the function returns NULL.

If the argument is not a string, it is interpreted as such.

SQL Examples for the CRC32 function


SELECT crc32('Test');
SELECT crc32('123');
SELECT crc32(123);
SELECT crc32(null);

crc32('Test')
int(10)
2018365746

crc32('123')
int(10)
2286445522

crc32(123)
int(10)
2286445522

crc32(null)
int(10)
NULL

The examples were created with the MyWAY SQL manager: Download

How to use the CRC32() function in MySQL and MariaDB databases

The CRC32() function in MySQL and MariaDB is commonly used to generate a checksum value to verify data integrity or to identify duplicate records based on their CRC-32 checksums to identify. This can be useful in scenarios such as data synchronization, error detection or data deduplication. The CRC-32 algorithm is a hash function that produces a relatively short checksum, making it susceptible to collisions. Therefore, it is not suitable for cryptographic purposes where collision resistance is critical.

Further MySQL und MariaDB SQL Numeric functions

BIT_COUNT	BIT_COUNT(Integer)
	More about BIT_COUNT Function

CEIL	CEIL(Number)
	More about CEIL Function

CEILING	CEILING(Number)
	More about CEILING Function

CRC32C	CRC32C([Parameter], String)

FLOOR	FLOOR(Number)
	More about FLOOR Function

SIGN	SIGN(Number)
	More about SIGN Function

ABS	ABS(Number)
	More about ABS Function

ACOS	ACOS(Number)
	More about ACOS Function

ASIN	ASIN(Number)
	More about ASIN Function

ATAN	ATAN(Number [, Number2])
	More about ATAN Function

ATAN2	ATAN2(Number [, Number2])
	More about ATAN2 Function

COS	COS(Number)
	More about COS Function

COT	COT(Number)
	More about COT Function

DEGREES	DEGREES(Number)
	More about DEGREES Function

EXP	EXP(Number)
	More about EXP Function

LN	LN(Number)
	More about LN Function

LOG	LOG([Base], Number)
	More about LOG Function

LOG10	LOG10(Number)
	More about LOG10 Function

LOG2	LOG2(Number)
	More about LOG2 Function

MOD	MOD(Number, Divider)
	More about MOD Function

POW	POW(Number, Exponent)
	More about POW Function

POWER	POWER(Number, Exponent)
	More about POWER Function

PI	PI()
	More about PI Function

RADIANS	RADIANS(Number)
	More about RADIANS Function

RAND	RAND([Number])
	More about RAND Function

ROUND	ROUND(Number [, Decimals])
	More about ROUND Function

SIN	SIN(Number)
	More about SIN Function

SQRT	SQRT(Number)
	More about SQRT Function

TAN	TAN(Number)
	More about TAN Function

TRUNCATE	TRUNCATE(Number, Decimals)
	More about TRUNCATE Function

Numeric functions	String functions	Regular Expressions	Date and Time functions
Comparison functions	Encryption & Compression	Conversion functions	NULL functions
Aggregate functions	Window functions	JSON functions	Geometric functions
Sequence functions	Information functions	Dynamic Columns	Miscellaneous functions

More information about the CRC32 SQL function: mysql.com and mariadb.com

Updated: 2023-09-24

2020-2024 Heino Cunze-Fischer