General MySQL Oracle SQL Server

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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, 514🔥, 0💬

CONNECTION_ID() - Thread ID of Current Connection
How to obtain the connection ID of the current connection using the CONNECTION_ID() function? CONNECTION_ID() is a MySQL built-in function that returns the connection ID of the current connection. The connection ID is also referred as thread ID or process ID. For example: SELECT CONNECTION_ID(); -- ... 2024-07-15, 512🔥, 0💬

JSON_OVERLAPS() - Checking JSON Overlaps
How to check if two JSON values have overlaps using the JSON_OVERLAPS() function? JSON_OVERLAPS(json1, json2) is a MySQL built-in function that detects overlaps of two JSON values using the following rules: If both arguments are objects, overlap means they have at least one key-value pair in common.... 2024-12-18, 511🔥, 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, 509🔥, 0💬

YEARWEEK() - Year Week Combination
How to calculate the year week combination from a given date using the YEARWEEK() function? YEARWEEK(date, mode) is a MySQL built-in function that calculates the year week combination from a given date. For example: SELECT YEARWEEK('2024-03-04'), WEEK('2024-03-04'); -- +------------------------+---- ... 2023-11-16, 509🔥, 0💬

SQRT() - Square Root of X
How to calculate the square root of a given number using the SQRT() function? SQRT(X) is a MySQL built-in function that calculates the square root of a given number. For example: SELECT SQRT(2), SQRT(4), SQRT(8); -- +--------------------+-------- -+--------------------+-- | SQRT(2) | SQRT(4) | SQRT(... 2023-11-14, 507🔥, 0💬

VARIANCE() - Synonym for VAR_POP()
What's the difference between VARIANCE() and VAR_POP() functions? VARIANCE(expr) is a synonym for the VAR_POP(expr) function. Related MySQL functions: VAR_POP() - Population Standard Variance   ⇒ Window Functions ⇐ VAR_SAMP() - Sample Standard Variance ⇑ MySQL Functions on Aggregation Groups ⇑⇑ My... 2023-12-01, 506🔥, 0💬

UUID() - Generating UUID String
How to generate a UUID (Universal Unique IDentifier) string using the UUID() function? UUID() is a MySQL built-in function that returns a UUID (Universal Unique IDentifier) string. For example: SELECT UUID(), UUID(); -- +----------------------------- ---------+-------------------- ------------------+... 2023-12-08, 502🔥, 0💬

NTH_VALUE() - N-th Value of Result Set Window
How to obtain the n-th value of a field expression in the current result set window using the NTH_VALUE() function? NTH_VALUE(exp, n) is a MySQL built-in window function that returns the n-th value of a field expression in the current result set window. For example: SELECT help_topic_id AS tip, help... 2024-09-12, 498🔥, 0💬

VAR_SAMP() - Sample Standard Variance
How to calculate the sample standard variance of a field expression in result set groups using the VAR_SAMP() function? VAR_SAMP(expr) is a MySQL built-in aggregate function that calculates the sample standard variance of a field expression in result set groups. For example: SELECT help_category_id,... 2023-12-01, 494🔥, 0💬

ROW_NUMBER() - Row Position in Result Set Window
How to obtain the row position of the current row in the current result set window using the ROW_NUMBER() function? ROW_NUMBER(n) is a MySQL built-in window function that returns the row position of the current row in the current result set window. For example: SELECT help_topic_id AS tic, help_cate... 2024-09-12, 492🔥, 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, 488🔥, 0💬

EXPORT_SET() - Exporting Binary Set to On/Off Flags
How to export an integer as a binary set to on/off flags using the EXPORT_SET() function? EXPORT_SET(bits, on, off, delimiter, len) is a MySQL built-in function that converts an integer as a binary set (a sequence of bits) to on/off flags. It loops through every bit of the given integer "bits" start... 2023-12-20, 484🔥, 0💬

PERCENT_RANK() - Rank Percentage of Sorted Values
How to calculate the rank percentage of the sorting field expression in the current result set window using the PERCENT_RANK() function? PERCENT_RANK(n) is a MySQL built-in window function that calculates the rank percentage of the sorting field expression in the current result set window. For examp... 2024-09-12, 477🔥, 0💬

RELEASE_LOCK() - Release Lock Instance
How to release an instance of a given lock associated with the current connection session using the RELEASE_LOCK() function? RELEASE_LOCK(lock) is a MySQL built-in function that releases an instance of a given lock associated with the current connection session. It returns 1 if released Successfully... 2023-12-20, 477🔥, 0💬

IS_USED_LOCK() - Checking Lock Owner
How to check the owner of a user defined lock using the IS_USED_LOCK() function? IS_USED_LOCK(lock) is a MySQL built-in function that returns the connection id the lock associated with if the lock is in use, NULL otherwise. For example: SELECT GET_LOCK('MyLock', 60), IS_USED_LOCK('MyLock'); -- +----... 2023-12-20, 476🔥, 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, 465🔥, 0💬

UPPER() - Convert String to Upper Case
How to convert a string to upper case using the UPPER() function? UPPER(str) is a MySQL built-in function that converts all characters of a given into upper case characters. For example: SET @str = 'dba.FYIcenter.com'; SELECT UPPER(@str); -- +-------------------+ -- | UPPER(@str) | -- +-------------... 2023-11-13, 460🔥, 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, 459🔥, 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, 458🔥, 0💬

TAN() - Tangent Trigonometric Value
How to calculate the tangent trigonometric value of a given angle using the TAN() function? TAN(X) is a MySQL built-in function that calculates the tangent trigonometric value of a given angle in radians. For example: SELECT TAN(0.1), TAN(1.57), TAN(3.14); -- +---------------------+------- ----------... 2023-11-14, 458🔥, 0💬

IS_FREE_LOCK() - Checking Lock Status
How to check the status of a user defined lock using the IS_FREE_LOCK() function? IS_FREE_LOCK(lock) is a MySQL built-in function that returns 1 if a given user lock is free, 0 otherwise. For example: SELECT GET_LOCK('MyLock', 60), IS_FREE_LOCK('MyLock'); -- +------------------------+---- -----------... 2023-12-20, 448🔥, 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, 443🔥, 0💬

VALIDATE_PASSWORD_STRENGTH() - Password Strength Test
How to test the strength of a password using the VALIDATE_PASSWORD_STRENGTH() function? VALIDATE_PASSWORD_STRENGTH(pas sword)is a MySQL built-in function that calculates the strength of a given password. It requires validate_password plugin component to be installed. For example: SELECT VALIDATE_PAS... 2024-12-18, 441🔥, 0💬

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General MySQL Oracle SQL Server