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Метод PIPELINED.
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/* Метод pipelined. | |
Имеется таблица dept со следующей структурой: | |
Name Type Nullable Default Comments | |
------ ------------ -------- ------- -------- | |
DEPTNO NUMBER | |
DNAME VARCHAR2(14) Y | |
LOC VARCHAR2(13) Y | |
Необходимо реализовать функцию PL/SQL которая будет возвращать выборку из таблицы dept заданную | |
минимальным и максимальным значением поля DEPTNO. | |
Реализуемая функция должна использовать метод pipelined. | |
*/ | |
CREATE OR REPLACE TYPE rowsGetDept | |
IS OBJECT (deptno NUMBER, | |
dname VARCHAR2(14), | |
loc VARCHAR2(13)); | |
CREATE OR REPLACE TYPE tblRowGetDept | |
IS TABLE OF rowsGetDept; | |
CREATE OR REPLACE FUNCTION fnc_get_dept | |
RETURN tblRowGetDept PIPELINED | |
IS | |
BEGIN | |
FOR cur IN (SELECT dept.deptno, dept.dname, dept.loc | |
FROM dept | |
WHERE dept.deptno | |
BETWEEN (SELECT MIN(dept.deptno)FROM dept) | |
AND (SELECT MAX(dept.deptno)FROM dept)) | |
LOOP | |
PIPE ROW (rowsGetDept(cur.deptno,cur.dname,cur.loc)); | |
END LOOP; | |
END fnc_get_dept; |
Author
aykononov
commented
Nov 11, 2019
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