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Oracle PL/SQL/Object Oriented Database/Varray - История изменений
2026-05-27T01:53:43Z
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в 13:45, 26 мая 2010
2010-05-26T13:45:19Z
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Admin: 1 версия
2010-05-26T10:02:40Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==DML operations on collections.==<br />
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<br />
<br />
<!-- start source code --><br />
<br />
<source lang="sql"><br />
<br />
SQL><br />
SQL> CREATE OR REPLACE TYPE BookList AS VARRAY(10) OF NUMBER(4);<br />
2 /<br />
Type created.<br />
SQL><br />
SQL><br />
SQL> CREATE TABLE class_material (<br />
2 department CHAR(3),<br />
3 course NUMBER(3),<br />
4 required_reading BookList<br />
5 );<br />
Table created.<br />
SQL><br />
SQL><br />
SQL><br />
SQL> DECLARE<br />
2 v_CSBooks BookList := BookList(1000, 1001, 1002);<br />
3 v_HistoryBooks BookList := BookList(2001);<br />
4 BEGIN<br />
5 INSERT INTO class_material<br />
6 VALUES ("MUS", 100, BookList(3001, 3002));<br />
7<br />
8 INSERT INTO class_material VALUES ("CS", 102, v_CSBooks);<br />
9<br />
10 INSERT INTO class_material VALUES ("HIS", 101, v_HistoryBooks);<br />
11 END;<br />
12 /<br />
PL/SQL procedure successfully completed.<br />
SQL><br />
SQL><br />
SQL> select * from class_material;<br />
DEP COURSE<br />
--- ----------<br />
REQUIRED_READING<br />
--------------------------------------------------------------------------------<br />
MUS 100<br />
BOOKLIST(3001, 3002)<br />
CS 102<br />
BOOKLIST(1000, 1001, 1002)<br />
HIS 101<br />
BOOKLIST(2001)<br />
<br />
SQL><br />
SQL> drop table class_material;<br />
Table dropped.<br />
SQL><br />
SQL><br />
<br />
</source><br />
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<br />
<br />
<br />
==Varray of user types==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="sql"><br />
<br />
SQL><br />
SQL><br />
SQL> create or replace type erratum_t as object<br />
2 ( code varchar2(4)<br />
3 , ch number(2)<br />
4 , pg number(3)<br />
5 , txt varchar2(40)<br />
6 ) ;<br />
7 /<br />
Type created.<br />
SQL><br />
SQL> create or replace type errata_tab_t as table of erratum_t;<br />
2 /<br />
Type created.<br />
SQL><br />
SQL> describe errata_tab_t<br />
errata_tab_t TABLE OF ERRATUM_T<br />
Name Null? Type<br />
----------------------------------------- -------- ----------------------------<br />
CODE VARCHAR2(4)<br />
CH NUMBER(2)<br />
PG NUMBER(3)<br />
TXT VARCHAR2(40)<br />
SQL> drop type errata_tab_t force;<br />
Type dropped.<br />
SQL> drop type erratum_t force;<br />
Type dropped.<br />
SQL><br />
<br />
</source></div>
Admin