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中所有的记录都取后,CUR...
With the cursor FOR loop, you do not have to explicitly: Declare a record into which the cursor’s row is fetched. Open the cursor. Fetch from the cursor into the record. Detect last record fetched in cursor. Close the cursor. All these steps are performed automatically by PL/SQL which ...
This Oracle tutorial explains how to use the CURSOR FOR LOOP in Oracle with syntax and examples. The syntax for the CURSOR FOR Loop in Oracle / PLSQL is:
Introduction to PL/SQL cursor FOR LOOP statement# The cursorFOR LOOPstatement is an elegant extension of the numericFOR LOOPstatement. The numericFOR LOOPexecutes the body of a loop once for every integer value in a specified range. Similarly, the cursorFOR LOOPexecutes the body of the loop ...
In Oracle PL/SQL you can use the FOR loop statement to open a cursor and fetch rows. In Java JDBC you can open ResultSet and use while() statement to iterate rows. Oracle: -- Procedure that fetches rows from a cursor CREATE OR REPLACE PROCEDURE sp
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....
loop if dbms_sql.fetch_rows(cursor1) > 0 then begin dbms_sql.column_value(cursor1, 1, MyTime); dbms_sql.column_value(cursor1, 2, MyIndex); TempDate(i) := MyTime; TempIndex(i) := MyIndex; i := i - 1;--按倒序的方法填入数组 ...
end loop; 3、if使用 if(条件)then [真值语句块] end if; 4、单引号字符表示 ''':最外层两个单引号表示字符串引用,字符串中间第一个单引号表示转义,第二个单引号表示单引号。 例子: v_sql :='select count(*) from pm4h_mo.mdl_resmodel t1, pm4h_mo.mdl_resmodeltable t2 where...
隐式cursor当然是相对于显式而言的,就是没有明确的cursor的declare。在Oracle的PL/SQL中,所有的DML操作都被Oracle内部解析为一个cursor名为SQL的隐式游标,只是对我们透明罢了。 另外,我们前面提到的一些循环操作中的指针for 循环,都是隐式cursor。 隐式cursor示例一: ...
The cursor FOR loop statement opens a previously declared cursor, fetches all rows in the cursor result set, and then closes the cursor. Use this statement instead of separate SQL statements to open a cursor, define a loop construct to retrieve each row of the result set, test for the end...