- Tags: MySQL
- Categories: Reference, SQL Reference, SQL Resources
Quick Reference
This is a quick reference list of MySQL advanced functions and how they are used to work with databases.
SQL – MySQL BIN() Function
The MySQL BIN() function returns a binary representation of a number, as a string value.
SQL – MySQL BINARY Function
The MySQL BINARY function converts a value to a binary string.
SQL – MySQL CASE Function
The MySQL CASE statement goes through conditions and will stop reading and return a value when the first condition in the list is met.
SQL – MySQL CAST() Function
The MySQL CAST() function converts a value of any type into the specified datatype.
SQL – MySQL COALESCE() Function
The MySQL COALESCE() function returns the first non-null value in a list.
SQL – MySQL CONNECTION_ID() Function
The MySQL CONNECTION_ID() function returns the unique connection ID for the current connection.
SQL – MySQL CONV() Function
The MySQL CONV() function converts a number from one numeric base system to another, and returns the result as a string value.
SQL – MySQL CONVERT() Function
The MySQL CONVERT() function converts a value into the specified datatype or character set.
SQL – MySQL CURRENT_USER() Function
The MySQL CURRENT_USER() function returns the user name and host name for the MySQL account that the server used to authenticate the current client.
SQL – MySQL DATABASE() Function
The MySQL DATABASE() function returns the name of the current database. If there is no current database, this function returns NULL or “”.
SQL – MySQL IF() Function
The MySQL IF() function returns a value if a condition is TRUE, or another value if a condition is FALSE.
SQL – MySQL IFNULL() Function
The MySQL IFNULL() function returns a specified value if the expression is NULL.
SQL – MySQL ISNULL() Function
The MySQL ISNULL() function returns 1 (null) or 0 (not null) depending on whether an expression is NULL.
SQL – MySQL LAST_INSERT_ID() Function
The MySQL LAST_INSERT_ID() function returns the AUTO_INCREMENT id of the last row that has been inserted or updated in a table.
SQL – MySQL NULLIF() Function
The MySQL NULLIF() function compares two expressions and returns NULL if they are equal. Otherwise, the first expression is returned.
SQL – MySQL SESSION_USER() Function
The MySQL SESSION_USER() function returns the current user name and host name for the MySQL connection.
SQL – MySQL SYSTEM_USER() Function
The MySQL SYSTEM_USER() function returns the current user name and host name for the MySQL connection.
SQL – MySQL USER() Function
The MySQL USER() function returns the current user name and host name for the MySQL connection.
SQL – MySQL VERSION() Function
The MySQL VERSION() function returns the current version of the MySQL database, as a string.
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SQL NOTES:
- Any work being done to modify the structure of a database or delete tables or the the database itself should only be done after making a recent backup
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