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Code Listing 3: Use SQL MODEL to find the last Saturday.
SQL> select next_day( last_day( add_months( trunc( sysdate,'y' ),cell ) )-7,
2 to_char( to_date( '29-jan-1927', 'dd-mon-yyyy' ), 'DAY' ) )
3 from dual
4 model return all rows
5 dimension by (0 attr)
6 measures (0 cell)
7 rules iterate (12) (
8 cell[iteration_number] = iteration_number
9 );
Execution Plan
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0 SELECT STATEMENT Optimizer=ALL_ROWS (Cost=2 Card=1)
1 0 SQL MODEL (ORDERED FAST)
2 1 FAST DUAL (Cost=2 Card=1)
Statistics
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0 recursive calls
0 db block gets
0 consistent gets
0 physical reads
0 redo size
666 bytes sent via SQL*Net to client
512 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
12 rows processed
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