MySQL Functions on System Information

Q

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.

✍: FYIcenter.com

A

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

BENCHMARK() - Repeating Expression Evaluation

CONNECTION_ID() - Thread ID of Current Connection

CURRENT_ROLE() - Current Role of Logged-In User

CURRENT_USER() - Authentication Name of Current User

DATABASE() - Name of Current Database

FOUND_ROWS() - Row Count from Last SELECT Statement

ICU_VERSION() - ICU (International Components for Unicode) Version

LAST_INSERT_ID() - Last Value of AUTO_INCREMENT Column

PS_CURRENT_THREAD_ID() - PS Thread ID of Current Connect

PS_THREAD_ID() - PS Thread ID of Given Connect

ROLES_GRAPHML() - User Role Graph in GraphML Format

ROW_COUNT() - Affected Rows from Last DML Statement

SCHEMA() - Synonym for DATABASE()

SESSION_USER() - Synonym for USER()

SYSTEM_USER() - Synonym for USER()

USER() - Login Name of Current User

VERSION() - Version Number of MySQL Server

⇒ BENCHMARK() - Repeating Expression Evaluation

⇐ UUID_TO_BIN() - Converting UUID to Binary

⇑⇑ MySQL Function References

2024-07-15, 576🔥, 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, 582🔥, 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, 579🔥, 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...

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, 578🔥, 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, 577🔥, 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, 553🔥, 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💬

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💬

SYSTEM_USER() - Synonym for USER()
What's the difference between SYSTEM_USER() and USER() functions? SYSTEM_USER() is a synonym for the USER() function. Related MySQL functions: USER() - Login Name of Current User SESSION_USER() - Synonym for USER() SYSTEM_USER() - Synonym for USER() CURRENT_USER() - Authentication Name of Current Us... 2025-01-07, 429🔥, 0💬

BIN() - Converting Integer to Binary String
How to convert an integer to a binary string using the BIN() function? BIN(int) is a MySQL built-in function that converts an integer to binary string. For example: SELECT BIN(1), BIN(2), BIN(4), BIN(8), BIN(16), BIN(1024); -- +--------+--------+--------+-- ------+---------+------------- +-- | BIN(1)... 2024-11-23, 391🔥, 0💬

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