As the name suggests Cursor For Loop is a type of For loop provided by oracle PL/SQL which makes working with cursors in oracle database a lot easier by executing OPEN, FETCH & CLOSE Cursor statements implicitly in the background for you....
declarel_sqlvarchar2(123);--variable that contains a queryl_c sys_refcursor;--cursor variable(weak cursor).l_res your_table%rowtype;--variable containing fetching databeginl_sql :='select * from your_table';--Open the cursor and fetching data explicitly--in the LOOP.openl_cforl_sql; ...
END LOOP; You would use aCURSOR FOR Loopwhen you want to fetch and process every record in a cursor. TheCURSOR FOR Loopwill terminate when all of the records in the cursor have been fetched. 译:当你每次想通过cursor来对每条记录进行取及操作时,就可以使用CURSOR FOR Loop。当cursor中所有的记录...
In this case, the cursorFOR LOOPdeclares, opens, fetches from, and closes an implicit cursor. However, the implicit cursor is internal; therefore, you cannot reference it. Note that Oracle Database automatically optimizes a cursorFOR LOOPto work similarly to aBULK COLLECTquery. Although your co...
end loop;close c1;EXCEPTION when err then (这里可以写上你需要的提示)WHEN OTHERS THEN rollback;end;这样写的好处就是 当里面发生错误的时候直接跳到异常中的err 不会中断这段代码的执行。楼上说的把exeception放到循环里面也是不行的，主要就是要修改exeception中，不能rollback，否则的一定...
ORACLE中用for in 使用cursor CURSOR cur IS SELECT * FROM xxx; FOR cur_result in cur LOOP BEGIN V_SUM :=cur_result.列名1+cur_result.列名2 END; END LOOP; END; 中的CURSOR cur IS得到的是什么? 用for in 能够得到什么? 答: CURSOR cur IS是定义一个游标,然后把游标里定义的查询语句存储到...
open cursor with字符串变量出现错误EN介绍oracle cursor(游标)之前先，介绍一下oracle的库缓存，Oracle库...
in(2,3,4)andrownum < 5orderbycm.policy_codedesc';---Open Cursoropencur_policyforsqlStr;loop...
1)Select …INTO…语句,DML语句,使用隐式Cursor。此外,另一种使用FOR LOOP的Implicit Cursor使用方法。 Every time you run either a SQL DML statement or a PL/SQLSELECTINTO statement, PL/SQL opens animplicit cursor. You can get information about this cursor from its ...
Loop in Loop with 2 Cursor 6381 Daniel Seeliger July 27, 2010 09:25AM Re: Loop in Loop with 2 Cursor 1899 Chad Bourque July 27, 2010 11:48AM Re: Loop in Loop with 2 Cursor 1513 Daniel Seeliger July 29, 2010 02:14AM Sorry, you can't reply to this topic. It has been closed...