In SQL Server, the CAST() function converts an expression of one data type to another.
Here’s a quick overview of the function with examples.
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MAX() Function in PostgreSQL
In PostgreSQL, the MAX() function computes the maximum of the non-null input values and returns the result.
This function can be used on any numeric, string, date/time, or enum type, as well as inet, interval, money, oid, pg_lsn, tid, and arrays of any of these types.
MIN() Function in PostgreSQL
In PostgreSQL, the MIN() function computes the minimum of the non-null input values and returns the result.
This function can be used on any numeric, string, date/time, or enum type, as well as inet, interval, money, oid, pg_lsn, tid, and arrays of any of these types.
DATABASE() – Get the Current Database Name in MySQL
In MySQL, 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. If there is no default database, it returns NULL.
PRAGMA table_list in SQLite
In SQLite, the table_list pragma returns information about the tables and views in the schema.
It was first introduced in SQLite version 3.37.0 (released on 2021-11-27).
SUM() Function in MySQL
In MySQL, the SUM() aggregate function returns the sum of a given expression.
It can also be used to return the sum of all distinct (unique) values in an expression.
AVG() Function in MariaDB
In MariaDB, the AVG() function returns the average value of the given expression.
The DISTINCT option can be used to return the average of the distinct values (i.e. remove duplicates before calculating the average).
NULL values are ignored.
SUM() Function in MariaDB
In MariaDB, the SUM() aggregate function returns the sum of a given expression.
It can also be used to return the sum of all distinct (unique) values in an expression.
HAS_DBACCESS() – Discover if a User Can Access a Database in SQL Server
SQL Server has a HAS_DBACCESS() function that returns information about whether the user has access to a specified database.