LOOP:先执行再判断,至少执行一次; WHILE LOOP:先判断再执行,如果不满足条件,就不执行 FOR循环:已知要循环的次数. 如果明确知道循环次数,使用FOR循环; 如果不知道循环次数,但是知道循环结束条件,使用LOOP循环. 循环控制:EXIT与CONTINUE语句完成。 PL/SQL程序与其他编程语言一样,也拥有自己的三种程序结构:顺序结构、分...
declare type row_num_type is table of number index by simple_integer; type row_text_type is table of varchar2(10) index by simple_integer; row_num_tab row_num_type; row_text_tab row_text_type; v_total number; sql_stmt varchar2(300);begin for i in 1..10 loop row_num_tab(i) ...
davice I am not sure about DO-WHILE IN MS SQL Server 2008 but you can change your WHILE loop logic, so as to USE like DO-WHILE loop. 1) Example of WHILE Loop DECLARE@intFlagINTSET@intFlag=1WHILE (@intFlag<=5)BEGINPRINT@intFlagSET@intFlag=@intFlag+1ENDGO ResultSet: 1 2 3 4 5 2...
“Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted to variables of type Object. [ODBC Driver Manager] Data source nam...
SQL Server存储过程中While循环的替代方法 sql sql-server tsql 我有一个存储过程,在这个过程中,a用键字段填充一个基表,然后循环遍历该表以获得这些键字段,从而重新查询源数据表以获得详细的计数。我遇到的问题是,当基表中有很多行时,SP需要很长时间才能运行。我已经将源数据加载到临时表中,创建了索引,并使基...
Print @DSQL END the @tempStartDate variable is not parsing correctly in the 2nd loop which is not allowing to increment the date by 10 minutes. Please let me know whats going wrong or did i miss any step. Any help would be very much appreciated. ...
The execution of statements in the WHILE loop can be controlled from inside the loop with the BREAK and CONTINUE keywords. Transact-SQL syntax conventions Syntax Syntax for SQL Server, Azure SQL Database, Azure SQL Managed Instance, and Microsoft Fabric. syntaxsql Copy WHILE boolean_expression ...
解决While loop问题 - Python 当你使用while循环时,你需要确保循环的终止条件最终会被满足,否则循环将会无限执行下去。通常情况下,你可以在循环内部修改循环控制变量,使得终止条件得以满足。 1、问题背景 一位开发者在使用Python开发一个基于文本的游戏时,遇到了 while 循环的问题。他将游戏代码和音频处理代码结合在一...
Sql server for-each或while行 SQL Server中没有直接的"for-each"或"while"行的概念。然而,可以使用不同的方法来实现类似的功能。 使用游标(Cursor):游标是一种用于遍历结果集的数据库对象。可以使用游标来逐行处理查询结果。游标提供了类似于"for-each"的功能。以下是一个示例:...
After reading this article you will understand the basics of using the WHILE statement to write a loop within a stored procedure. All the examples for this lesson are based on Microsoft SQL Server Management Studio and the sample databases AdventureWorks and WideWorldImporters. Start learning SQL ...