PL-SQL also has FOR LOOP facility. Basically for loop in PL_SQL are of two types. First is Numerical for loop and the second one is Curser for a loop. SO in this post, we will focus mainly on Numerical for a loo
You would use a FOR Loop when you want to execute the loop body a fixed number of times. 译:当你需循环体执行一定的次数的时候,就可以使用FOR Loop。 Let's take a look at an example. FOR Lcntr IN 1..20 LOOP LCalc := Lcntr * 31; END LOOP; This example will loop 20 times. The...
Basic PL/SQL FOR LOOP example In this example, the loop index is l_counter, lower_bound is one, and upper_bound is five. The loop shows a list of integers from 1 to 5: BEGIN FOR l_counter IN 1..5 LOOP DBMS_OUTPUT.PUT_LINE( l_counter ); END LOOP; END;Code language: SQL (...
This Oracle tutorial explains how to use the FOR LOOP in Oracle with syntax and examples. In Oracle, the FOR LOOP allows you to execute code repeatedly for a fixed number of times.
PL/SQL cursor FOR LOOP examples Let’s look at some examples of using the cursor FOR LOOP statement to see how it works. PL/SQL cursor FOR LOOP example The following example declares an explicit cursor and uses it in the cursor FOR LOOP statement. SET SERVEROUTPUT ON; DECLARE CURSOR ...
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,CURSOR FOR Loop就会终止。 Here is an example of a function that uses aCURSOR FOR Loop: CREATE OR REPLACE Function TotalIncome ( name_in IN varchar2 ) ...
FOR even_number IN 1..25 1. **循环范围分析**:题目要求输出2到50的25个偶数,这些偶数为2,4,6,...,50,共25个数。观察可得,每个偶数等于循环变量乘以2。若循环变量从1到25,则值为`even_number*2`时,依次生成2到50的偶数。 2. **填空匹配**: - 第一空需填入循环变量名(如`even_number`),...
IN游标 指定先前声明的游标的名称。 LOOP和END LOOP 开始和结束循环,此循环包含要在循环的每次迭代期间执行的 SQL 语句。 statement 一个或多个 PL/SQL 语句。至少需要一个语句。 示例 以下示例演示包含游标 FOR 循环的过程: CREATE OR REPLACE PROCEDURE cursor_example IS CURSOR emp_cur_1 IS SELECT * FROM...
因此`n NUMBER:=1`是正确初始化。2. **循环范围**:求10的阶乘需要将1到10的数连乘,故循环范围需设置为`1..10`。`FOR count1 IN 1..10 LOOP`正确覆盖所有乘数。3. **逻辑推导**:循环的每个迭代将当前`count1`累乘到n中,最终输出n即10!(3628800)。代码结构完整且符合PL/SQL语法规范。
SQL 过程中的 LOOP 语句 LOOP 语句是特殊类型的循环语句,原因是它没有终止条件子句。它会定义重复执行的一系列语句直到另一块逻辑(通常是控制转移语句)强制控制流跳至循环外部某点。 LOOP 语句通常与下列其中一个语句配合使用:LEAVE、GOTO、ITERATE 或 RETURN。这些语句可强制控制权跳至 SQL 过程中紧跟循环之后的...