в 13:45, 26 мая 2010

2010-05-26T13:45:19Z

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2010-05-26T10:00:20Z

1 версия

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==MULTISET EXCEPT operator finds the elements remaining from the first set after removing any matching elements from the second set==



<source lang="sql">

SQL> CREATE OR REPLACE TYPE list IS TABLE OF NUMBER;
2 /
Type created.
SQL>
SQL> CREATE OR REPLACE FUNCTION format_list(set_in LIST) RETURN VARCHAR2 IS
2 returnValue VARCHAR2(2000);
3 BEGIN
4 FOR i IN set_in.FIRST..set_in.LAST LOOP
5 returnValue := set_in(i)||" ";
6 END LOOP;
7 RETURN returnValue;
8 END format_list;
9 /
Function created.
SQL>
SQL> DECLARE
2 a LIST := list(1,2,3,4);
3 b LIST := list(4,5,6,7);
4 BEGIN
5 dbms_output.put_line(format_list(a MULTISET EXCEPT b));
6 END;
7 /
3
PL/SQL procedure successfully completed.

</source>

==MULTISET EXCEPT table collection==



<source lang="sql">

SQL> CREATE OR REPLACE PROCEDURE multiset_example AS
2 TYPE charTable IS TABLE OF VARCHAR2(10);
3 emp1 charTable;
4 emp2 charTable;
5 emp3 charTable;
6 count_var INTEGER;
7 BEGIN
8 emp1 := charTable("A", "B", "C");
9 emp2 := charTable("D", "E", "F");
10
11
12 emp3 := emp1 MULTISET EXCEPT emp2;
13 DBMS_OUTPUT.PUT_LINE("EXCEPT: ");
14 FOR count_var IN 1..emp3.COUNT LOOP
15 DBMS_OUTPUT.PUT(emp3(count_var) || " ");
16 END LOOP;
17
18 END multiset_example;
19 /
Procedure created.
SQL>
SQL>

</source>

==MULTISET INTERSECT operator finds the intersection or matching values between two sets==



<source lang="sql">

SQL> CREATE OR REPLACE TYPE list IS TABLE OF NUMBER;
2 /
Type created.
SQL>
SQL> CREATE OR REPLACE FUNCTION format_list(set_in LIST) RETURN VARCHAR2 IS
2 returnValue VARCHAR2(2000);
3 BEGIN
4 FOR i IN set_in.FIRST..set_in.LAST LOOP
5 returnValue := set_in(i)||" ";
6 END LOOP;
7 RETURN returnValue;
8 END format_list;
9 /
Function created.
SQL>
SQL> DECLARE
2 a LIST := list(1,2,3,4);
3 b LIST := list(4,5,6,7);
4 BEGIN
5 dbms_output.put_line(format_list(a MULTISET INTERSECT b));
6 END;
7 /
4
PL/SQL procedure successfully completed.
SQL>

</source>

==MULTISET INTERSECT table collection==



<source lang="sql">

SQL> CREATE OR REPLACE PROCEDURE multiset_example AS
2 TYPE charTable IS TABLE OF VARCHAR2(10);
3 emp1 charTable;
4 emp2 charTable;
5 emp3 charTable;
6 count_var INTEGER;
7 BEGIN
8 emp1 := charTable("A", "B", "C");
9 emp2 := charTable("D", "E", "F");
10
11
12 emp3 := emp1 MULTISET INTERSECT emp2;
13 DBMS_OUTPUT.PUT("INTERSECT: ");
14 FOR count_var IN 1..emp3.COUNT LOOP
15 DBMS_OUTPUT.PUT(emp3(count_var) || " ");
16 END LOOP;
17 DBMS_OUTPUT.PUT_LINE(" ");
18
19 END multiset_example;
20 /
Procedure created.
SQL>

</source>

==MULTISET UNION DISTINCT table collection==



<source lang="sql">

SQL> CREATE OR REPLACE PROCEDURE multiset_example AS
2 TYPE charTable IS TABLE OF VARCHAR2(10);
3 emp1 charTable;
4 emp2 charTable;
5 emp3 charTable;
6 count_var INTEGER;
7 BEGIN
8 emp1 := charTable("A", "B", "C");
9 emp2 := charTable("D", "E", "F");
10
11
12 emp3 := emp1 MULTISET UNION DISTINCT emp2;
13 DBMS_OUTPUT.PUT("UNION DISTINCT: ");
14 FOR count_var IN 1..emp3.COUNT LOOP
15 DBMS_OUTPUT.PUT(emp3(count_var) || " ");
16 END LOOP;
17 DBMS_OUTPUT.PUT_LINE(" ");
18
19 END multiset_example;
20 /
Procedure created.
SQL>

</source>

==MULTISET UNION operator performs a UNION ALL operation on two collections==



<source lang="sql">

SQL> CREATE OR REPLACE TYPE list IS TABLE OF NUMBER;
2 /
Type created.
SQL>
SQL> CREATE OR REPLACE FUNCTION format_list(set_in LIST) RETURN VARCHAR2 IS
2 returnValue VARCHAR2(2000);
3 BEGIN
4 FOR i IN set_in.FIRST..set_in.LAST LOOP
5 returnValue := set_in(i)||" ";
6 END LOOP;
7 RETURN returnValue;
8 END format_list;
9 /
Function created.
SQL>
SQL> DECLARE
2 a LIST := list(1,2,3,4);
3 b LIST := list(4,5,6,7);
4 BEGIN
5 dbms_output.put_line(format_list(a MULTISET UNION b));
6 END;
7 /
7
PL/SQL procedure successfully completed.
SQL>
SQL>

</source>

==MULTISET UNION table collection==



<source lang="sql">

SQL> CREATE OR REPLACE PROCEDURE multiset_example AS
2 TYPE charTable IS TABLE OF VARCHAR2(10);
3 emp1 charTable;
4 emp2 charTable;
5 emp3 charTable;
6 count_var INTEGER;
7 BEGIN
8 emp1 := charTable("A", "B", "C");
9 emp2 := charTable("D", "E", "F");
10
11 emp3 := emp1 MULTISET UNION emp2;
12 DBMS_OUTPUT.PUT("UNION: ");
13 FOR count_var IN 1..emp3.COUNT LOOP
14 DBMS_OUTPUT.PUT(emp3(count_var) || " ");
15 END LOOP;
16 DBMS_OUTPUT.PUT_LINE(" ");
17
18
19 END multiset_example;
20 /
Procedure created.

</source>

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в 13:45, 26 мая 2010

Admin: 1 версия