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 loop. So, FOR LOOP enable us to iterate any statement or statements in...
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...
A) Simple PL/SQL FOR LOOP example In this example, the loopindexisl_counter,lower_boundis one, andupper_boundis five. The loop shows a list of integers from 1 to 5. BEGINFORl_counterIN1..5LOOPDBMS_OUTPUT.PUT_LINE( l_counter );ENDLOOP;END;Code language:SQL (Structured Query Language...
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: FORloop_counterIN [REVERSE]lowest_number..highest_numberLOOP {...statements...} END LOOP; ...
oracle pl sql loop循环 先创建表: CREATE TABLE TB_USER ( ID INTEGER PRIMARY KEY, USER_NAME VARCHAR2(20) NOT NULL, USER_AGE INTEGER NOT NULL ); CREATE SEQUENCE SEQ_USER INCREMENT BY 1 START WITH 1 NOMAXVALUE NOCYCLE CACHE 10; CREATE OR REPLACE TRIGGER TR_USER BEFORE INSERT ON TB_USER...
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 ) ...
1) PL/SQL cursor FOR LOOP example The following example declares an explicit cursor and uses it in the cursor FOR LOOP statement. DECLARE CURSOR c_product IS SELECT product_name, list_price FROM products ORDER BY list_price DESC; BEGIN FOR r_product IN c_product LOOP dbms_output.put_lin...
Let's see the while loop in action in the code example below.Time for an Example!Below we have a simple program to print the odd numbers between 1 to 10 using the while loop.set serveroutput on; DECLARE num int:=1; BEGIN while(num <= 10) LOOP dbms_output.put_line(''|| no); ...
完成以下PL/SQL块,功能是:显示2 到50的25个偶数。(3分)BEGINFOR___[6]___ IN ___[7]___LOOPDBMS_OUTPUT
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...