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 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.