Oracle SQL - COVAR_POP function

Introduction

COVAR_POP function returns a population covariance between expr1 and expr2.

The general format of the COVAR_POP function is:

COVAR_POP(expr1, expr2) 

Given the following table.

Demo

SQL>
SQL> drop table my_table;

Table dropped.-- ww  w .j  a v a  2  s. com

SQL> create table my_table(
  2  x      NUMBER(4)  primary key,
  3  y      NUMBER(4)  not null);
SQL>
SQL> insert into my_table values(1,2);
SQL> insert into my_table values(2,4);
SQL> insert into my_table values(3,6);
SQL> insert into my_table values(4,9);
SQL> insert into my_table values(5,13);
SQL> insert into my_table values(6,16);
SQL> insert into my_table values(7,20);
SQL> insert into my_table values(8,27);
SQL> insert into my_table values(9,32);
SQL> insert into my_table values(10,47);
SQL> insert into my_table values(11,53);
SQL> insert into my_table values(12,60);
SQL> insert into my_table values(13,76);
SQL> insert into my_table values(14,100);
SQL> insert into my_table values(15,130);
SQL> insert into my_table values(16,189);
SQL> insert into my_table values(17,300);
SQL> insert into my_table values(18,789);
SQL> insert into my_table values(19,1000);
SQL>

Demo

SQL>
SQL> SELECT COVAR_POP(y, x) FROM my_table;

COVAR_POP(Y,X)-- from w ww.  ja va 2s .c  om
--------------
      01030.32

SQL>