General MySQL Oracle SQL Server

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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, 1573🔥, 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, 1573🔥, 0💬

CHARSET() - Detecting Character Set Name
How to detect the character set name associated to a given character string using the CHARSET() function? CHARSET(str) is a MySQL built-in function that returns the character set name associated to a given character string. A character set name refers to a set of rules to encode a set of characters ... 2025-10-24, 1567🔥, 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, 1561🔥, 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, 1555🔥, 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, 1535🔥, 0💬

DENSE_RANK() - Density Rank of Sorted Values
How to calculate the density rank of the sorting field expression in the current result set window using the DENSE_RANK() function? DENSE_RANK() is a MySQL built-in window function that calculates the density rank of the sorting field expression in the current result set window. For example: SELECT ... 2024-09-28, 1508🔥, 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, 1499🔥, 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, 1497🔥, 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, 1481🔥, 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, 1480🔥, 0💬

LEAD() - N-Row after Current Row within Window
How to evaluate a field expression on n-row after the current row in the current result set window using the LEAD() function? LEAD(exp, n, default) is a MySQL built-in window function that evaluates a field expression on n-row after the current row in the current result set window. For example: SELE... 2024-09-28, 1474🔥, 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, 1452🔥, 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, 1440🔥, 0💬

Window Functions
What Are Window Functions? A Window Function is a function that can perform calculations over a window of rows referenced from the current row in query result. A window function is called with a OVER clause in the following syntax: window_function(...) OVER window where window is one of the followin... 2024-05-15, 1438🔥, 0💬

JSON_PRETTY() - Validating JSON Value
How to encode a JSON (JavaScript Object Notation) value into a pretty-printing string using the JSON_PRETTY() function? JSON_PRETTY(json) is a MySQL built-in function that encodes a JSON (JavaScript Object Notation) value into a pretty-printing string. For example: SELECT JSON_PRETTY('["a",1,{"key1"... 2023-12-10, 1428🔥, 0💬

Removed: PASSWORD() - Generating Password Hash
How to convert a password into a hash value with the default hashing algorithm using the PASSWORD() function? PASSWORD(password) is a MySQL built-in function that converts a password into a hash value with the default hashing algorithm. Note that PASSWORD() is no longer supported. It was: Introduced... 2024-05-15, 1401🔥, 0💬

GET_LOCK() - Requesting User Defined Lock
How to request a user defined lock using the GET_LOCK() function? GET_LOCK(lock, timeout) is a MySQL built-in function that tries to obtain a user defined lock within a timeout period. It returns 1 if successful, 0 if failed. For example: SELECT GET_LOCK('MyLock', 60), IS_FREE_LOCK('MyLock'), IS_USE... 2023-12-20, 1401🔥, 0💬

MySQL Functions on Result Set Windows
Where to find reference information and tutorials on MySQL database functions on Result Set Windows? I want to know how to use FIRST_VALUE(), ROW_NUMBER() and other window functions. Here is a collection of reference information and tutorials on MySQL database functions on Result Set Windows compile... 2024-05-15, 1390🔥, 0💬

Removed: DECODE() - Decoding Data with Password
How to decode a byte sequence generated from the ENCODE() function using the DECODE() function? DECODE(cipher, pass) is a MySQL built-in function that encodes a byte sequence generated from the ENCODE() function. Note that DECODE() is no longer supported. It was: Introduced MySQL 4.0. Removed in MyS... 2024-10-14, 1383🔥, 0💬

BENCHMARK() - Repeating Expression Evaluation
How to evaluate an expression repeatedly for benchmark testing using the BENCHMARK() function? BENCHMARK(count, exp) is a MySQL built-in function that evaluates an expression repeatedly for benchmark testing and returns 0. For example: SELECT BENCHMARK(1000000, AES_ENCRYPT('hello','goodbye') );-- +-... 2024-07-17, 1377🔥, 2💬

💬 2024-07-17 Iqra Technology: This is a great overview of the `BENCHMARK()` function in MySQL! Your examples clearly illustrate how it can be used to evaluate...

RELEASE_ALL_LOCKS() - Release All Locks
How to release all locks associated with the current connection session using the RELEASE_ALL_LOCKS() function? RELEASE_ALL_LOCKS(lock) is a MySQL built-in function that releases all locks associated with the current connection session. It returns the number of locks released. For example: SELECT GE... 2023-12-20, 1372🔥, 0💬

Removed MySQL Functions
Where to find answers to frequently asked questions about Removed MySQL Built-in Functions? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com team about Removed MySQL Built-in Functions: Removed: ENCODE() - Encoding Data with Password Removed: DECODE() - Decodi... 2024-10-14, 1369🔥, 0💬

SLEEP() - Holding Statement Execution
How to hold the statement execution for some time using the SLEEP() function? SLEEP(sec) is a MySQL built-in function that holds the execution of the current statement for sec seconds. For example: SELECT SYSDATE(), SLEEP(2), SYSDATE(); -- +---------------------+------- ---+---------------------+-- ... 2023-12-19, 1363🔥, 0💬

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General MySQL Oracle SQL Server