PL/SQL 允许在另一个循环中使用一个循环。以下部分显示了一些示例来说明这个概念。 PL/SQL 中嵌套基本 LOOP 语句的语法如下: LOOP Sequence of statements1 LOOP Sequence of statements2 END LOOP; END LOOP; 复制 PL/SQL 中嵌套 FOR LOOP 语句的语法如下: FOR counter1 IN initial_value1 .. final_...
PL/SQL LoopsLoops in PL/SQL provides a way of repeating a particular part of any program or any code statement as many times as required.In PL/SQL we have three different loop options to choose from when we want to execute a statement repeatedly in our code block. They are:Basic Loop ...
5. Labels Each of the loops can be labeled 1 2 3 4 <> loop ... endloop label_name; When a loop is labeled, the exit statement can then refer to that label: 1 2 3 4 5 6 7 8 9 begin <>foriin1 .. 10 loop <<j_loop>>forjin1 .. 10 loop dbms_output.put(to_char(j,'...
When you have nested loops, it’s necessary to use loop labels. The loop labels allow you to specify the loop in the exit and continue statements, indicating which loop these statements refer to. PL/pgSQL loop statement examples Let’s explore some examples of using the loop statement. 1)...
Loops with PL/SQL Types of loops Basic loop loop /* statements */ end loop; While loop while a > b loop /* statements */ end loop See also Iterating over collection variables. For loop for i in 1..1000 loop insert into a values(i,i*2); ...
PL/SQL WHILE loop examples Let’s take some examples of using the WHILE loop statement to see how it works. 1) Simple PL/SQL WHILE loop example The following example illustrates how to use the WHILE loop statement: DECLARE n_counter NUMBER := 1; BEGIN WHILE n_counter <= 5 LOOP DBMS_...
PL/SQL - 循环 在本章中,我们将讨论 PL/SQL 中的循环。 可能存在需要多次执行一段代码的情况。 一般来说,语句是按顺序执行的:函数中的第一条语句首先执行,然后是第二条,依此类推。 编程语言提供了各种控制结构,允许更复杂的执行路径。 循环语句允许我们多次执行一条语句或一组语句,以下是大多数编程语言中...
Examples to demonstrate the functioning and use of FOR LOOP in PLSQL Now let’s try some examples which will help you understand the concepts more clearly. Input 1: DECLARE BEGIN FOR vc IN 1..7 LOOP DBMS_OUTPUT.PUT_LINE(vc); END LOOP; ...
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:
This Oracle tutorial explains how to use the FOR LOOP in Oracle with syntax and examples.Description In Oracle, the FOR LOOP allows you to execute code repeatedly for a fixed number of times.Syntax The syntax for the FOR Loop in Oracle/PLSQL is: FOR loop_counter IN [REVERSE] lowest_...