SQL> create table TestTable (
2 x number primary key,
3 y number
4 );
Table created.
SQL>
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> insert into TestTable values (10, 32 );
1 row created.
SQL> insert into TestTable values (11, 12 );
1 row created.
SQL> insert into TestTable values (12, 16 );
1 row created.
SQL> insert into TestTable values (13, 63 );
1 row created.
SQL> insert into TestTable values (14, 74 );
1 row created.
SQL> insert into TestTable values (15, 36 );
1 row created.
SQL> insert into TestTable values (16, 56 );
1 row created.
SQL> insert into TestTable values (17, 2 );
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
10 32
11 12
12 16
13 63
14 74
15 36
16 56
17 2
17 rows selected.
SQL>
SQL>
SQL> -- Row-ordering is done first and then the moving average:
SQL>
SQL> SELECT x, y,
2 AVG(y) OVER(ORDER BY y
3 ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) ma
4 FROM TestTable
5 ORDER BY y;
X Y MA
---------- ---------- ----------
2 1 1.5
3 2 1.66666667
17 2 3
4 5 4.66666667
1 7 6.33333333
5 7 8.66666667
11 12 11.6666667
12 16 20
7 32 26.6666667
10 32 32.6666667
6 34 34
15 36 37.6666667
8 43 45
16 56 54
13 63 64.3333333
14 74 74.6666667
9 87 80.5
17 rows selected.
SQL>
SQL>
SQL>
SQL> drop table TestTable;
Table dropped.
SQL>
SQL>