WHILE condition LOOP statements; END LOOP;Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) In this syntax, the condition is a boolean expression that evaluates to TRUE, FALSE or NULL. The WHILE loop statement continues to execute the statements between the LOOP and END LOOP as long...
Oracle/PLSQL: While Loop The syntax for the WHILE Loop is: WHILE condition LOOP {.statements.} END LOOP; You would use a WHILE Loop when you are not sure how many times you will execute the loop body. Since the WHILE condition is evaluated before entering the loop, it is possible that...
51CTO博客已为您找到关于sql server 使用while loop的相关内容,包含IT学习相关文档代码介绍、相关教程视频课程,以及sql server 使用while loop问答内容。更多sql server 使用while loop相关解答可以来51CTO博客参与分享和学习,帮助广大IT技术人实现成长和进步。
PL/SQL WHILE LOOP语句 只要给定条件为真,PL/SQL编程语言中的WHILE LOOP语句重复执行目标语句。 语法 WHILE LOOP语句的语法如下 - WHILEconditionLOOP sequence_of_statementsENDLOOP; 示例 以下是有关WHILE LOOP语句的应用示例 - SETSERVEROUTPUTONSIZE1000000;DECLAREa number(2) :=10;BEGINWHILE a<20LOOP dbms_ou...
-- loop DECLARE v_num VARCHAR2(100); CURSOR c_num IS SELECT NAME FROM test_t WHERE ROWNUM < 600000; BEGIN dbms_output.enable(800000); OPEN c_num; LOOP FETCH c_num INTO v_num; EXIT WHEN c_num%NOTFOUND; --未找到数据 END LOOP; CLOSE c_num; END; -- while DECLARE v_num3 VARCH...
Introduction to PL/pgSQL while loop statement The while loop statement executes one or more statements as long as a specified condition is true. Here’s the basic syntax of a while loop statement: [ <> ] while condition loop statements; end loop; In this syntax, PostgreSQL evaluates ...
We will examine each statement in more detail in the following section. WHILE loop The syntax of theWHILEstatement is as follows: WHILE expression DO Statements END WHILE TheWHILEloop checks the expression at the beginning of each iteration. If the expression evaluates toTRUE, MySQL will executes...
LOOP -基本循环 WHILE -根据条件循环 FOR -固定次数的循环 create table T_TEST ( id number(5), num number(10) ); 1. 2. 3. 4. 5. LOOP 语法 LOOP sequence_of_statements END LOOP; 1. 2. 3. 4. 5. 示例 DECLARE v_count NUMBER(5):=1; ...
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'end while' at line 1 Subject Written By Posted while loop?? Tom Peters
C# While LoopThe while loop loops through a block of code as long as a specified condition is True:SyntaxGet your own C# Server while (condition) { // code block to be executed } In the example below, the code in the loop will run, over and over again, as long as a variable (i...