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rahul_b87	16 Jul, 2008 - 09:36 PM Post #1
New D.I.C Head Joined: 16 Jul, 2008 Posts: 2	Hi all What is the role of cursor? why we use it ? There are any alternate of cursor.if it is then what is the diff ?
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lordms12	17 Jul, 2008 - 06:04 AM Post #2
D.I.C Regular Joined: 16 Feb, 2008 Posts: 312 Thanked 13 times Dream Kudos: 225 My Contributions	Cursor is called iterator in many other programming languages. It is like loops. Simple code use for loop: pl/sql FOR RecordIndex IN (SELECT person_code FROM people_table) LOOP DBMS_OUTPUT.PUT_LINE(RecordIndex.person_code); END LOOP; Same code using cursor: pl/sql DECLARE CURSOR cursor_person IS SELECT person_code FROM people_table; BEGIN FOR RecordIndex IN cursor_person LOOP DBMS_OUTPUT.PUT_LINE(RecordIndex.person_code); END LOOP; END; For more infos check links: http://en.wikipedia.org/wiki/Cursor_%28databases%29 http://www.sqlteam.com/article/cursors-an-overview http://en.wikipedia.org/wiki/SQL_Problems_Requiring_Cursors http://en.wikipedia.org/wiki/PL/SQL#Cursor_FOR_loops
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