Oracle Collections

Oracle - Collections Kaushik Raghupathi

What is a Collection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Index by Table - Associative Array ,[object Object],[object Object],[object Object],DECLARE TYPE population_type IS TABLE OF NUMBER INDEX BY VARCHAR2(64); country_population population_type; howmany NUMBER; BEGIN country_population('Greenland') := 100000; country_population('Iceland') := 750000; howmany := country_population('Greenland'); END; /

Index by Table - Associative Array ,[object Object],[object Object]

Nested Tables ,[object Object],[object Object],[object Object],[object Object],[object Object],DECLARE TYPE CourseList IS TABLE OF VARCHAR2(16); my_courses CourseList; BEGIN my_courses := CourseList('Econ 2010', 'Acct 3401', 'Mgmt 3100'); dbms_output.put_line(my_courses(1)); END; /

Nested Tables ,[object Object]

vArray ,[object Object],[object Object],[object Object],[object Object],DECLARE TYPE CourseList IS VARRAY(50) OF VARCHAR2(16); my_courses CourseList; BEGIN my_courses := CourseList('Econ 2010', 'Acct 3401', 'Mgmt 3100'); END;

Initializing, Extend, Count, Delete ,[object Object]

Key Aspects ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Passing Collections as Parameters DECLARE TYPE Roster IS TABLE OF VARCHAR2(15); names Roster := Roster('J Hamil', 'D Piro', 'R Singh'); i BINARY_INTEGER := 2; BEGIN verify_name(names(i)); -- call procedure END;

Using Collections in Tables CREATE TYPE ProjectList AS VARRAY(50) OF VARCHAR2(16); / CREATE TABLE department ( -- create database table dept_id NUMBER(2), name VARCHAR2(15), budget NUMBER(11,2), -- Each department can have up to 50 projects. projects ProjectList) /

Using Collections in Tables INSERT INTO department VALUES(60, 'Security', 750400, ProjectList('New Badges', 'Track Computers', 'Check Exits')); Try selecting data from the table

Using Collections in Tables SELECT a.* FROM TABLE(SELECT projects FROM department) a

Oracle Collections

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Oracle Collections