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...
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.
A) Simple 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:...
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...
1) PL/SQL cursor FOR LOOP example# The following example declares an explicit cursor and uses it in the cursorFOR LOOPstatement. DECLARECURSORc_productISSELECTproduct_name, list_priceFROMproductsORDERBYlist_priceDESC;BEGINFORr_productINc_productLOOPdbms_output.put_line( r_product.product_name ||...
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 ) ...
在for循环内部转换一次就可以了。例如:设一个j变量 for i in 1..3 loop j:=i*2-1;...end loop;
"FOR LOOP Index" [ REVERSE ]lower_bound..upper_bound lower_boundandupper_boundmust evaluate to numbers (see"Lower Bound and Upper Bound"). PL/SQL evaluateslower_boundandupper_boundonce, when theFORLOOPstatement is entered, and stores them as temporaryPLS_INTEGERvalues, rounding them to the ...
Example: #include<stdio.h> void main() { int i = 20; while( i <=20 ) { printf ("%d " , i ); i++; } } Output: 20 2. do – while loop in C It also executes the code until the condition is false. In this at least once, code is executed whether the condition is true...