In MariaDB, DEFAULT() is a built-in function that returns the default value for a table column.
If the column has no default value and it is nullable, then NULL is returned. If the column has no default value and it is not nullable, an error is returned.
In MariaDB, ROWNUM() is a built-in function that returns the current number of accepted rows in the current context. Its main purpose is to emulate the ROWNUM pseudo column in Oracle.
ROWNUM() can be used in a way that has a similar effect to the LIMIT clause – to limit the number of results returned by a query.
When in Oracle mode, it can be called as ROWNUM (i.e. without the parentheses).
The ROWNUM() function is supported from MariaDB 10.6.1.
In MariaDB, VERSION() is a built-in function that returns the MariaDB server version.
The result is a string that uses the utf8 character set.
In MariaDB, you can use the LIMIT clause to reduce the number of rows returned by a query. The FOUND_ROWS() function can be used in such queries to return the number of rows that would have been returned, had the LIMIT clause not been included.
This can be handy, because it allows you to get this information without having to run the query again.
The FOUND_ROWS() function can also be used to return the number of rows that were actually returned by the limited statement, if that’s what you need.
In MariaDB, the SCHEMA() function is a synonym for the DATABASE() function. It returns the default (current) database name.
The result is returned as a string in the utf8 character set.
In MariaDB, DATABASE() is a built-in function that returns the default (current) database name.
The result is returned as a string in the utf8 character set.
In MariaDB, CURRENT_USER() is a built-in function that returns the user name and host name combination for the MariaDB account that the server used to authenticate the current client.
In MariaDB, USER() is a built-in function that returns the current MariaDB user name and host name, given when authenticating to MariaDB.