Oracle PL/SQL/Analytical Functions/COVAR POP

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COVAR_POP(expr1, expr2): returns a population covariance between expr1 and expr2

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SQL> SQL> SQL> create table TestTable (

 2    x    number primary key,
 3    y    number
 4  );

Table created. SQL> insert into TestTable values (1, 7 ); 1 row created. SQL> insert into TestTable values (2, 1 ); 1 row created. SQL> insert into TestTable values (3, 2 ); 1 row created. SQL> insert into TestTable values (4, 5 ); 1 row created. SQL> insert into TestTable values (5, 7 ); 1 row created. SQL> insert into TestTable values (6, 34 ); 1 row created. SQL> insert into TestTable values (7, 32 ); 1 row created. SQL> insert into TestTable values (8, 43 ); 1 row created. SQL> insert into TestTable values (9, 87 ); 1 row created. SQL> SQL> select * from TestTable;

        X          Y

----------
        1          7
        2          1
        3          2
        4          5
        5          7
        6         34
        7         32
        8         43
        9         87

9 rows selected. SQL> SQL> -- COVAR_POP(expr1, expr2): returns a population covariance between expr1 and expr2. SQL> SQL> SQL> -- COVAR_POP(expr1, expr2) SQL> SQL> SQL> SELECT COVAR_POP(y, x) FROM TestTable; COVAR_POP(Y,X)


   59.4444444

SQL> SQL> drop table TestTable; Table dropped. SQL> SQL> SQL>

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