SQL - Useful Functions
SQL has many built-in functions for performing processing on string or numeric data. Following is the list of all useful SQL built-in functions:
SQL COUNT Function - The SQL COUNT aggregate function is used to count the number of rows in a database table.
SQL MAX Function - The SQL MAX aggregate function allows us to select the highest (maximum) value for a certain column.
SQL MIN Function - The SQL MIN aggregate function allows us to select the lowest (minimum) value for a certain column.
SQL AVG Function - The SQL AVG aggregate function selects the average value for certain table column.
SQL SUM Function - The SQL SUM aggregate function allows selecting the total for a numeric column.
SQL SQRT Functions - This is used to generate a square root of a given number.
SQL RAND Function - This is used to generate a random number using SQL command.
SQL CONCAT Function - This is used to concatenate any string inside any SQL command.
SQL Numeric Functions - Complete list of SQL functions required to manipulate numbers in SQL.
SQL String Functions - Complete list of SQL functions required to manipulate strings in SQL.