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_OUTPUT.PUT_LINE( 'Counter : ' || n_counter ); n_counter := n_counter + 1; END LOOP; END; Code languag...
译:当你不确定循环体有多少次的时候,可以使用WHILE LOOP。因为在进入循环以前,WHILE的条件是先给的,因为可能循环体不止执行一次。 Let's take a look at an example: WHILE monthly_value <= 4000 LOOP monthly_value := daily_value * 31; END LOOP; In this example, the WHILE Loop would terminate on...
dropprocedureifexistsp_while_do;createprocedurep_while_do()begindeclareiint;seti=1;whilei<=10doselectconcat('index :', i);seti=i+1;endwhile;end; call p_while_do(); FOR LOOP dropprocedureifexistsp_for_loop;createprocedurep_for_loop()begindeclareiint;seti=1; loop_example : loopselectco...
DECLARE @I INT=1; WHILE (1=1) -- DO BEGIN PRINT @I; SET @I+=1; IF NOT (@I<=10) BREAK; -- WHILE @I<=10 END Now, you could of course rewrite this particular example as a simple WHILE loop, since this is not such a good candidate for a DO / WHILE construct. The empha...
在上面的示例中,我们创建了一个名为loop_example的存储过程,该存储过程使用WHILE循环来执行10次SQL语句SELECT CONCAT('This is iteration ', i);。在每次循环中,会输出当前迭代次数。通过这种方式,我们可以实现在MySQL中循环执行一条SQL语句的功能。 接下来,我们使用mermaid语法中的stateDiagram来绘制这个循环执行SQL语...
在PL/pgSQL中,可以使用FOR循环、WHILE循环和LOOP循环来实现循环结构。在循环中使用函数参数的步骤如下: 定义一个函数,函数的参数作为循环的条件或控制变量。 在循环开始前,使用函数参数初始化循环的控制变量。 在循环体内部,根据函数参数的值执行相应的逻辑操作。
for_loop_statement Whereas the number of iterations through aWHILEloop is unknown until the loop completes, the number of iterations through aFORloop is known before the loop is entered. NumericFORloops iterate over a specified range of integers. The range is part of an iteration scheme, which...
A. Use BREAK and CONTINUE with nested IF...ELSE and WHILEIn the following example, if the average list price of a product is less than $300, the WHILE loop doubles the prices and then selects the maximum price. If the maximum price is less than or equal to $500, the WHILE loop ...
While(1=1)BEGIN--loop safety netif@iteration>=100beginbreak--exit after 100 iterationsendselect@iteration=@iteration+1BEGINTRYDELETETOP (10) t--changed the batch size..for the examplefrom(selecttop (10000)*fromparentorderbyid)ast;set@myrowcount=@@rowcount;SET@COUNT=@COUNT+@myrowcount; ...
Hi, We are using the below query to iterate through all the records and then increment a date as follows: WHILE ( @TempStartDate <= @endDateTime ) BEGIN WHILE (@RowNo < = @Tot_Count) BEGIN Print @TempStartDate …