MySQL Functions for Miscellaneous Purposes

Q

Where to find reference information and tutorials on MySQL database functions for Miscellaneous Purposes? I want to know how to use CAST(), SLEEP() and other miscellaneous functions.

✍: FYIcenter.com

A

Here is a collection of reference information and tutorials on MySQL database functions for Miscellaneous Purposes compiled by FYIcenter.com DBA team.

CAST() - Casting Expression to Value

COALESCE() - Finding First Non-NULL Value

CONVERT() - Character Set Conversion

DEFAULT() - Table Column Default Value

EXTRACTVALUE() - Extracting Text Content from XML

GET_LOCK() - Requesting User Defined Lock

GREATEST() - Finding the Greatest/Maximum Value

IF() - Conditional Value Selection

IFNULL() - Replacing NULL Value

INET_ATON() - IP Address String to Number

INET_NTOA() - IP Address Number to String

INET6_ATON() - IPv6 Address String to Number

INET6_NTOA() - IPv6 Address Number to String

IS_FREE_LOCK() - Checking Lock Status

IS_IPV4() - Detecting IPv4 Address

IS_IPV4_COMPAT() - IPv4-Compatible IPv6 Address

IS_IPV4_MAPPED() - IPv4-Mapped IPv6 Address

IS_IPV6() - Detecting IPv6 Address

IS_USED_LOCK() - Checking Lock Owner

ISNULL() - Detecting NULL Value

LEAST() - Finding the Least/Minimum Value

NAME_CONST() - PS Thread ID of Given Connect

NULLIF() - NULL on Equal Values

RELEASE_ALL_LOCKS() - Release All Locks

RELEASE_LOCK() - Release Lock Instance

SLEEP() - Holding Statement Execution

UPDATEXML() - Updating Child Element in XML

VALUES() - Column Value for "ON DUPLICATE KEY UPDATE"

⇒ CAST() - Casting Expression to Value

⇐ VERSION() - Version Number of MySQL Server

⇑⇑ MySQL Function References

2023-12-19, 1943🔥, 0💬

IS_IPV6() - Detecting IPv6 Address
How to detect an IPv4 Address using the IS_IPV6() function? IS_IPV6(ip) is a MySQL built-in function that returns 1 if the given value is a valid IPv6 address, 0 otherwise. For example: SELECT IS_IPV4('10.0.5.9'), IS_IPV4('10.0.5.256'); -- +---------------------+------- ----------------+-- | IS_IPV4... 2026-01-24, 1640🔥, 0💬

JSON_SCHEMA_VALIDATION_REPORT() - JSON Schema Validation Report
How to generate a validation report of a JSON value against a JSON schema using the JSON_SCHEMA_VALIDATION_REPORT( )function? JSON_SCHEMA_VALIDATION_REPORT( schema,json) is a MySQL built-in function that returns a validation report of a JSON value against a given JSON schema. The report itself is a ... 2024-11-23, 1585🔥, 0💬

JSON_VALUE() - Converting JSON Value
How to convert a JSON value to a given MySQL data type using the JSON_VALUE() function? JSON_VALUE(json, path RETURNING type on_empty on_error) is a MySQL built-in function that converts a JSON value to a given MySQL data type. The input JSON value can be a member of a parent JSON array or object. F... 2024-11-23, 1493🔥, 0💬

IS_IPV4() - Detecting IPv4 Address
How to detect an IPv4 Address using the IS_IPV4() function? IS_IPV4(ip) is a MySQL built-in function that returns 1 if the given value is a valid IPv4 address, 0 otherwise. For example: SELECT IS_IPV4('10.0.5.9'), IS_IPV4('10.0.5.256'); -- +---------------------+------- ----------------+-- | IS_IPV4... 2026-02-02, 1463🔥, 0💬

JSON_TABLE() - Inline Table with JSON Array
How to create an inline table with a JSON Array using the JSON_TABLE() function? JSON_TABLE(json, path COLUMNS (column_list) AS alias) is a MySQL built-in function that creates an inline table by parsing JSON array members. For example: the following statement creates a 1-column table with string me... 2024-11-23, 1440🔥, 0💬

JSON_SCHEMA_VALID() - JSON Schema Validation
How to validate a JSON value against a JSON schema using the JSON_SCHEMA_VALID() function? JSON_SCHEMA_VALID(schema, json) is a MySQL built-in function that validates a JSON value against a given JSON schema. For example: SET @schema = '{ "id": "http://json-schema.org/geo", "$schema": "http://json-s... 2024-11-23, 1427🔥, 0💬

LEAST() - Finding the Least/Minimum Value
How to find the least (minimum) value of a given list of values using the LEAST() function? LEAST(val1, val2, ...) is a MySQL built-in function that returns the least (minimum) value of a given list of values. For example: SELECT LEAST(70, 89, 73, 99, 101, 110, 116, 101, 114); -- +------------------... 2023-12-19, 1335🔥, 0💬

NULLIF() - NULL on Equal Values
How to generate NULL with equal values using the NULLIF() function? NULLIF(val1, val2) is a MySQL built-in function that returns NULL if the first argument equals the second, the first argument otherwise. For example: SELECT NULLIF('yes', 'yes'), NULLIF('yes', 'no'); -- +----------------------+-----. .. 2023-12-19, 1292🔥, 0💬

IS_IPV4_COMPAT() - IPv4-Compatible IPv6 Address
How to detect an IPv6 Address that is IPv4 compatible using the IS_IPV4_COMPAT() function? IS_IPV4_COMPAT(ip) is a MySQL built-in function that returns 1 if the given IPv6 address is IPv4-compatible, 0 otherwise. The IPv6 address must be given in number format. An IPv4-compatible IPv6 address has 12... 2026-02-02, 1261🔥, 0💬

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