Analytic function
This operation was introduced in Oracle 8.1.6
This operation is implemented in the following versions
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This example was developed using Oracle 9.2.0.1 on Windows 2000
This example requires the following table definition
CREATE TABLE t1 (c1 NUMBER,c2 NUMBER);
The table does not need to be analysed
The statement
SELECT c1,RANK () OVER ( ORDER BY c2 DESC ) FROM t1;
generates the following execution plan
0 SELECT STATEMENT Optimizer=CHOOSE 1 0 WINDOW (SORT) 2 1 TABLE ACCESS (FULL) OF 'T1'