WHILE (@RowNo < = @Tot_Count) BEGIN Print @TempStartDate SET @DSQL = 'SELECT F1 FROM Evaluation.CalculatedLimits_' + CAST(@PlantLineMapId as varchar) + ' WHERE PROCESS = 2 AND TIMESTAMP = ' + '''+CONVERT(nvarchar(50), @TempStartDate,121)+''' SET @RowNo = @RowNo + 1 END ...
这样就跳出循环了，也可以换成RETURN，RETURN会结束整个批查询的执行，BREAK仅仅跳出循环，继续执行后边的语句。给你个例子:for loop是这样的:createprocedure probegindeclare aintdefault1;label1: loopif a<6thenselecta;seta=a+1;iterate label1;endif;leave label1;跳出循环endloop label1;endwhile是...
proc_loop(10,5); 该循环必须要结合EXIT使用,否则将陷入死循环。 WHILE_LOOP语句语法图 图2 while_loop::= 只要条件表达式为真,WHILE语句就会不停地在一系列语句上进行循环,在每次进入循环体的时候进行条件判断。 示例 1 2 3 4 5 6 来自:帮助中心 ...
WHILE @Loop <= 100000 BEGIN Set @PRID = NewID() Set @PRDesc = ' PerformanceIssue - ' + Convert( Varchar(10),@Loop ) Insert Into PerformanceIssue Values (@PRID, @Loop, @PRDesc) Set @Loop = @Loop + 1 END 脚本成功执行后,数据就添加进去了。 用下面语句来看一下表的内容: Select PRID...
while@loop_time<=@max_ids begin select@file_bak_path=file_path from@temwhereids=@loop_time select@sql_cmd='dir'+@file_bak_path EXEC@proc_result=master..xp_cmdshell @sql_cmd,no_output /*系统存储过程xp_cmdshell返回代码值:0(成功)或1(失败)*/ ...
建议使用SELECT语句,或While Loop语句实现相同功能 子查询 注意子查询、临时表和表变量的使用 只返回出必须的列,不要包含与处理需求无关的列(*) 变量 变量赋值:请修改为SELECT TOP 1… 动态T-SQL处理语句中,如果涉及到变量,尽量使用sp_executesql,通过参数传递进行处理 ...
Since it is recursive and relies on previous data to generate the next set of results, MSSQL doesn't perform well with parallel execution. Using a Temp Table and While Loop: This approach proved to be slower than my current recursive query, which uses a CTE (Common Table Expressi...
-- Wrap the log if necessary.WHILE @MaxMinutesDATEDIFF (mi, @StartTime, GETDATE()) -- time has not expiredAND @OriginalSize = (SELECT size FROM sysfiles WHERE name = @LogicalFileName)AND (@OriginalSize * 8 /1024)@NewSizeBEGIN -- Outer loop.SELECT @Counter = 0WHILE ((@...
Hello, an error occurred yesterday when the plugin was trying to unsuccefully send more than the maximum supported characters in a MS SQL column with 'varchar(MAX)'. In this case you can be stuck in an infinite retry loop with "String or binary data would be truncated", and the logstas...
Sub LoopThroughQueryResults() Dim db As DAO.Database Dim rs As DAO.Recordset Dim strSQL As String ' 设置数据库和查询 Set db = CurrentDb strSQL = "SELECT * FROM YourTable" Set rs = db.OpenRecordset(strSQL) ' 循环遍历记录集 Do While Not rs.EOF ' 在这里执行你的操作,例如: De...