General MySQL Oracle SQL Server

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Inserting Rows with a SELECT Statement in MySQL
How To Insert Multiple Rows with a SELECT Statement in MySQL? If want to insert rows into a table based on data rows from other tables, you can use a sub-query inside the INSERT statement as shown in the following script example: &lt;?php include "mysql_connection.php"; $sql = "INSERT INTO fyi_l... 2017-09-20, 2185🔥, 0💬

Removed: ENCODE() - Encoding Data with Password
How to encode a byte sequence with a given password using the ENCODE() function? ENCODE(clear, pass) is a MySQL built-in function that encodes a byte sequence with a given password using the default encoding algorithm. Note that ENCODE() is no longer supported. It was: Introduced MySQL 4.0. Removed ... 2024-10-14, 2125🔥, 0💬

MySQL Functions for Miscellaneous Purposes
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. Here is a collection of reference information and tutorials on MySQL database functions for Miscellaneous Purposes co... 2026-03-22, 2038🔥, 0💬

JSON_STORAGE_FREE() - Free Space in JSON Value
How to obtain the free space size in a JSON table column using the JSON_STORAGE_FREE() function? JSON_STORAGE_FREE(json) is a MySQL built-in function that returns the free space size in a JSON table column. Free space occurs when JSON table column is partially updated with less data. For example: CR... 2024-12-18, 1969🔥, 0💬

COERCIBILITY() - Character Collation Coercibility
How to detect the collation coercibility associated to a given character string using the COERCIBILITY() function? COERCIBILITY(str) is a MySQL built-in function that returns the collation coercibility associated to a given character string. A collation coercibility refers to the coercibility index,... 2025-10-14, 1920🔥, 0💬

LAG() - N-Row before Current Row within Window
How to evaluate a field expression on n-row before the current row in the current result set window using the LAG() function? LAG(exp, n, default) is a MySQL built-in window function that evaluates a field expression on n-row before the current row in the current result set window. For example: SELE... 2024-09-28, 1905🔥, 0💬

UNCOMPRESSED_LENGTH() - Uncompressed Data Length
How to calculate the original data length of a compressed byte string using the UNCOMPRESSED_LENGTH() function? UNCOMPRESSED_LENGTH(str) is a MySQL built-in function that returns the original data length of a given compressed byte string. For example: SET @bin = x'37000000789C738BF44C4ECD2B49 2DD24BC... 2024-12-18, 1889🔥, 0💬

MySQL Functions on Character String Values
Where to find reference information and tutorials on MySQL database functions on string values? I want to know how to use SUBSTRING(), REPLACE() and other character string related functions. Here is a collection of reference information and tutorials on MySQL database functions on string values comp... 2023-11-10, 1852🔥, 0💬

JSON_VALID() - Validating JSON Value
How to verify if value is a JSON (JavaScript Object Notation) value using the JSON_VALID() function? JSON_VALID(val) is a MySQL built-in function that returns 1 if the given value is a valid JSON value. For example: SELECT JSON_VALID('hello'), JSON_VALID('"hello"'); -- +---------------------+------- ... 2023-12-17, 1789🔥, 0💬

JSON_QUOTE() - Quoting JSON String
How to convert a regular character string into a JSON (JavaScript Object Notation) string using the JSON_QUOTE() function? JSON_QUOTE(str) is a MySQL built-in function that converts a regular character string into a JSON string by quoting the string with double quotes. It replaces the double-quote c... 2023-12-10, 1771🔥, 0💬

UPDATEXML() - Updating Child Element in XML
How to update a child element in an XML document at a given location using the UPDATEXML() function? UPDATEXML(xml, path, subxml) is a MySQL built-in function that updates a child element in an XML document at a given location. For example: SET @xml = ' X Y '; SELECT UPDATEXML(@xml, '/a', ' Z '); +-... 2026-01-24, 1743🔥, 0💬

FIRST_VALUE() - First Value of Result Set Window
How to obtain the first value of a field expression in the current result set window using the FIRST_VALUE() function? FIRST_VALUE(exp) is a MySQL built-in window function that returns the first value of a field expression in the current result set window. For example: SELECT help_topic_id AS tip, h... 2024-09-28, 1739🔥, 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, 1722🔥, 0💬

LAST_VALUE() - Last Value of Result Set Window
How to obtain the last value of a field expression in the current result set window using the LAST_VALUE() function? LAST_VALUE(exp) is a MySQL built-in window function that returns the last value of a field expression in the current result set window. For example: SELECT help_topic_id AS tip, help_... 2024-09-28, 1720🔥, 0💬

RANK() - Vale Rank of Sorted Values
How to calculate the value rank of the sorting field expression in the current result set window using the RANK() function? RANK(n) is a MySQL built-in window function that calculates the value rank of the sorting field expression in the current result set window. For example: SELECT help_topic_id A... 2024-09-12, 1709🔥, 0💬

MAKE_SET() - Filtering List with Binary Set
How to filter a list of strings with a binary set provided as an integer using the MAKE_SET() function? MAKE_SET(bits, str1, str2, ...) is a MySQL built-in function that filters a list of strings with a binary set provided as an integer. It loops through every bit of the given integer "bits" startin... 2023-12-20, 1704🔥, 0💬

MySQL Functions on System Information
Where to find reference information and tutorials on MySQL database functions on System Information? I want to know how to use DATABASE(), VERSION() and other functions. Here is a collection of reference information and tutorials on MySQL database functions on System Information compiled by FYIcente... 2024-07-15, 1689🔥, 0💬

Removed: DES_ENCRYPT() - DES Data Encryption
How to encrypt data with the DES (Data Encryption Standard) algorithm using the DES_ENCRYPT() function? DES_ENCRYPT(clear, key) is a MySQL built-in function that encrypts data with the DES (Data Encryption Standard) algorithm. Note that DES_ENCRYPT() is no longer supported. It was: Introduced MySQL ... 2024-10-14, 1679🔥, 0💬

NTILE() - Dividing Window into N Tiles
How to divid result set window into N tiles and return the tile position using the NTILE() function? NTILE(n) is a MySQL built-in window function that divides result set window into n tiles and returns the tile position of the current row. For example: SELECT help_topic_id AS tip, help_category_id A... 2024-09-12, 1678🔥, 0💬

CRC32() - Cyclic Redundancy Check 32-Bit
How to calculate the 32-bit CRC (Cyclic Redundancy Check) value using the CRC32() function? CRC32(str) is a MySQL built-in function that calculates the 32-bit CRC (Cyclic Redundancy Check) value of a given character string and returns it as an integer. For example: SELECT CRC32('MySQL'), HEX(CRC32('... 2024-07-15, 1656🔥, 0💬

Removed: DES_DECRYPT() - DES Data Decryption
How to decrypt data with the DES (Data Encryption Standard) algorithm using the DES_DECRYPT() function? DES_DECRYPT(cipher, key) is a MySQL built-in function that decrypts data with the DES (Data Encryption Standard) algorithm. Note that DES_DECRYPT() is no longer supported. It was: Introduced MySQL... 2024-10-14, 1626🔥, 0💬

Calling MySQL Built-in Functions
Where to find answers to frequently asked questions about calling MySQL Built-in Functions? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com team about calling MySQL Built-in Functions: Function Name Case Insensitive Function Argument Modifier Variable Number ... 2023-11-14, 1625🔥, 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, 1624🔥, 0💬

IS_UUID() - Validating UUID String Format
How to validate a UUID (Universal Unique IDentifier) string using the IS_UUID() function? IS_UUID(uuid) is a MySQL built-in function that validates a UUID (Universal Unique IDentifier) string. It only checks if the given UUID is a 32-digit hexadecimal string or not. For example: SELECT IS_UUID('447f... 2023-12-08, 1622🔥, 0💬

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General MySQL Oracle SQL Server