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...
AI检测代码解析 DELIMITER//CREATEPROCEDUREloop_example()BEGINDECLAREiINTDEFAULT0;DECLAREmax_countINTDEFAULT10;WHILEi<max_countDO-- 需要循环执行的SQL语句SELECTCONCAT('This is iteration ',i);SETi=i+1;ENDWHILE;END//DELIMITER; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 在上面...
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...
Example 2-49 Equivalent BOOLEAN Expressions 代码语言:javascript 代码运行次数:0 运行 AI代码解释 DECLAREdoneBOOLEAN;BEGIN--TheseWHILEloops are equivalentdone:=FALSE;WHILEdone=FALSELOOPdone:=TRUE;ENDLOOP;done:=FALSE;WHILENOT(done=TRUE)LOOPdone:=TRUE;ENDLOOP;done:=FALSE;WHILENOTdoneLOOPdone:=TRUE;END...
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 …
A. Use BREAK and CONTINUE with nested IF...ELSE and WHILE In 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 ...
DECLARE @loop INT; DECLARE @AccountDescription VARCHAR(50); DECLARE @AccountKey INT; DECLARE @AccountType VARCHAR(50); DECLARE @AccountCode INT; SELECT @loop = 0 BEGIN TRANSACTION WHILE (@loop < 300000) BEGIN SELECT @AccountKey = CAST(RAND() * 10000000 AS INT); SELECT @AccountDescription...
-- Find friends-of-friends-of-friends, excluding those cases where the relationship "loops back".-- For example, Alice is a friend of John; John is a friend of Mary; and Mary in turn is a friend of Alice.-- This causes a "loop" back to Alice. In many cases, it is necessary to...