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One, if statementIn PL/SQL, keywords such as if, then, else, elsif, endif are used to perform conditional logicSyntax format:if conditions 1 Then Statement 1elsif conditions 2 Then Statement 2Else Statement 3End If; Example 1: Practice If structureSolution: Note the program in:Second, Case statementSyntax structure: Case variables when value 1 Then Statement 1; when value 2 Then Statement 2; when value 3 Then Statement 3;...... when value N Then Statement N;[Else statement ]End case;Where [else
#循环, Traverse, iterate# for Loop, while loopSee Data typesType (name) intBreak no matter whether the loop is complete or not, end the loop immediatelyContinue end this cycle and proceed to the next cycleOne, while loop# while loop, must have a counter# The
1, first need a test table data student2. Normal circulation1) Cycle 5 times to modify student table information--Looping through modification records--DECLARE @i intSet @i=0While @iBeginUpdate Student Set demo = @i+5 where [email protected]Set @[email protected] +1End--View Results--SELECT * FROM Student2) query results after execution3. Cursor loop (no transaction)1) Modify the information according to the actual data of the student table---cursor
SQL often uses loops, and here's a look at common loops and cursor loops1, first need a test table data student2. Normal circulation1) Cycle 5 times to modify student table information--Looping through modification records--DECLARE @i intSet @i=0While @iBeginUpdate Student Set demo = @i+5 where [email protected]Set @[email protected] +1End--View Results--SELECT * FROM Student2) query results after execution3. Cursor loop (no transaction)1) Modify the
Tags: case Yun loop file sleep variable top carriage return while20.10 for Loop Syntax: for variable name in condition; Do ...; Done ;案例1[[emailprotected] shell]# cat for.sh#!/bin/bashsum=0for i in `seq 1 100`do sum=$[$sum+$i]doneecho $sum#输出的结果[[emailprotected] shell]# sh for.sh 5050 File list loop [[emailprotected] shell]# cat for
One, while loopInstance: Public class test{ publicstaticvoid main (string[] args) { int i = 1; while (i) { System.out.println (i); I+ +; }}}Second, Do-while cycle Public class test{ publicstaticvoid main (string[] args) { int i = 1; Do { System.out.println (i); I++ ; } while (i); // Do-while Loop, first executed once, and then in
Label:1. While LoopDELIMITER $$DROP PROCEDURE IF EXISTS' Sp_test_while ' $$CREATE PROCEDURE' Sp_test_while ' (inchP_numberINT, #要循环的次数inchP_startidINT#循环的其实值)BEGIN DECLAREV_valINT DEFAULT 0; SETV_val=P_startid;outer_label:BEGIN#设置一个标记 whileV_valP_number DoSETV_val=V_val+1; IF(V_val= -) ThenLEAVE Outer_label; #满足条件, terminates the loop, jumps to the end Outer_label tagEND IF;END while; SELECT 'I'm the while outside, the SQL inside the Outer_label'#由
Different types of loops JavaScript supports different types of loops:For-loop code block a certain number of timesFor/in-Looping through the properties of an objectWhile-loops the specified code block when the specified condition is trueDo/while-also loops the specified code block when the specified condition is trueFor loopA For loop is a tool that you will often use when you want to create a
C # loop statement: while LOOP and for loop (1 ), For example, if we want to output hundreds of numbers when doing a lot of things, one output is not only troublesome, but also time-consuming and inefficient. At this time, C # provides us with a simpler output method, that is, a loop. There are multiple types of loops.
------Java Training, Android training, iOS training,. NET training, look forward to communicating with you! -------"Loop Structure"1 , circular structure Introduction:Loops are executing the same block of code again and again2. Several conditions constituting the cyclic structure:cyclic control conditions;Loop Body: code block The statement that can let the loop
1. while loop DELIMITER $ DROPPROCEDUREIFEXISTS 'sp _ test_while '$ CREATEPROCEDURE 'sp _ test_while' (INp_numberINT, # The number of times INp_startidINT # the actual value of the loop) BEGINDECLARE... Mysql while, loop, repeat loop, conforming to the condition to jump out of the
the format of awhile loop statement: 1. Format: while (condition of the loop) { loop statement;} 2, while the Loop statement to note matters:1) The While Loop statement is typically the number of times a variable is controlled by its
Title, do you define a new variable within the loop that is not each cycle? Reply to discussion (solution) It's hard to say, look at your needs. It's hard to say, look at your needs.Each time a local variable is needed in the loop, is the variable defined in the loop body or in the loop body? This depends on y
(1) While loop, do While loop: the difference between, while is to first judge the condition, then execute the statement. The Do while is executing the statement first, then judging the condition.while (loop condition expression) {do{EXECUTE statement; EXECUTE statement;}}while (cyclic conditional expression);(2) for loop:for (initialize expression;
if we want to do a lot of things, say we want to output hundreds of numbers, one output of the words not only cumbersome and time-consuming, inefficient. In this case, C # provides us with a much simpler way to output the loop. There are many types of loops, here I compare two loops: while loop for Loop. first of all , the while loop:the format of the while
Mysql while, loop, repeat loop, conforming to the condition to jump out of the loop, mysqlrepeat1. while Loop DELIMITER $ drop procedure if exists 'SP _ test_while '$ create procedure 'SP _ test_while' (IN p_number INT, # The number of times to be cyclically IN p_startid INT # the actual value of the
The variables required in the PHP loop block are defined outside the loop or in the loop? For example, does the definition create a variable in each loop? Php: Well, it depends on your needs. this depends on your needs. if you want to use the variables required in the PHP loop
The variables required in the PHP loop block are defined outside the loop or in the loop? For example, does the definition create a variable in each loop? Php ------ solution ------------------ it's hard to say, let's look at your needs ------ solution ------------------ depends on the variable you need in the PHP
JavaScript as the scripting language for the client, generally speaking, is the speed of the first. The speed required depends on what makes the fastest. The circulation basically all language all has, is also the most commonly used, its embodiment, basically can represent the speed the embodiment. Basically 2 loops in javascript: For loop while loop The For loop
The variables required in the PHP loop block are defined outside the loop or in the loop? For example, does the definition create a variable in each loop? Reply to discussion (solution) Well, let's look at your needs. Well, let's look at your needs.Each time a local variable is required in the circulatory body, i
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