Aggregate Functions Count, Sum, Min, Max, Avg tutorial in php

 SELECT with Aggregate Functions Syntax :

SELECT COUNT(column_name) FROM table_name WHERE condition;

SELECT SUM(column_name) FROM table_name WHERE condition;


If we want to COUNT total number of records from table using COUNT from table name "personal" then we can use below sql command :

SELECT COUNT(*) FROM personal;


If we want to COUNT total number of DISTINCT cities records from table using COUNT from table name "personal" by Renaming column name as "Count" then we can use below sql command :

SELECT COUNT(DISTINCT city) AS Count FROM personal;


If we want to select Maximum Age from records using "Max" from table name "personal" by Renaming column name as "Maximum Age" then we can use below sql command :

SELECT MAX(age) AS MaximumAge, name, city, id, phone FROM personal;


If we want to select Minumum Age from records using "Min" from table name "personal" by Renaming column name as "MinimumAge" then we can use below sql command :

SELECT MIN(age) AS MinimumAge, name, city, id, phone FROM personal;


If we want to count SUM of any columns records using SUM from table name "personal" by Renaming column name as "Sumof" then we can use below sql command :

SELECT SUM(percentage) AS Sumof FROM personal;


If we want to count Average of any columns records using AVG from table name "personal" by Renaming column name as "Average" then we can use below sql command :

SELECT AVG(percentage) AS Average FROM personal;

Comments

Post a Comment

Popular posts from this blog

Logical_Operators

  <?php     $age = 20 ;     $age1 = 25 ;     if ( $age >= 18 && $age <= 21 )     {         echo "You are Eligible<br>" ;     }         if ( $age >= 18 || $age <= 21 )     {         echo "You are Eligible<br>" ;     }     //Below condition is True So that "Not Operator(!)" will return False condition     if (!( $age >= 18 ))     {         echo "You are Eligible<br>" ;     }     //Below condition is False So that "Not Operator(!)" will return True condition     if (!( $age <= 18 ))     {         echo "You are Eligible<br>" ;     }     //If both condition is "True" OR "False" at that time xor will return "False" and if one condition is     //"True" and s...
Read more

SubQuery with EXISTS and NOT EXISTS in PHP

 SELECT with SubQuery Syntax : SELECT columns FROM table1 WHERE column = (SELECT columns FROM table2 WHERE condition); In "personal" table, there are 6 columns named id, name, percentage, age, gender, city. In "personal" table, column name "id" is PRIMARY KEY and column name "city" is FOREIGN KEY. In "courses" table, there are 2 columns named course_id and course_name. In "courses" table, column name "course_id" is PRIMARY KEY. In "city" table, there are 2 columns named cid and cityname. In "city" table, column name "cid" is PRIMARY KEY. If we want to select records from "personal" table who belong to Delhi from "city" table using SubQuery then we can use below shown sql query : SELECT name FROM personal WHERE city = (SELECT cid FROM city WHERE cityname = "Delhi"); If we want to select records from "personal" table who belong to Delhi and Agra from...
Read more

Get Functions

  <?php //There are many Get Functions in PHP as shown below: //get_class, get_parent_class, get_class_methods, get_class_vars, get_object_vars, get_called_class, //get_declared_classes, get_declared_interfaces, get_declared_traits, class_alias class ParentClass {     function name ()     {         echo "Class Name : " . get_class ( $this ) . "<br>" ;   //Print the particualr Class Name         //Print the particular Parent Class Name as shown below:         echo "Parent Class Name : " . get_parent_class ( $this ) . "<br>" ;     } } class ChildClass extends ParentClass {     function __construct ()     {}     function myfunction ()     {}     function myfunction2 ()     {} } $obj = new ChildClass (); $obj -> name (); echo "Class Name is : " . get_class ( $obj ) . "<br>" ; echo "Paren...
Read more