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是这样的:createprocedure probegindeclare aintd...
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 ...
mssql备份数据库语句 更多内容 循环语句 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 查看更多...
MySQL存储过程支持IF、CASE、LOOP、WHILE等控制结构。 MSSQL存储过程也支持类似的IF、CASE、WHILE等控制结构,但语法略有不同。 MySQL示例: MySQL示例: MSSQL示例: MSSQL示例: 系统存储过程: MySQL和MSSQL都提供了系统存储过程,但名称和功能可能有所不同。例如,MySQL的系统存储过程以sp_开头,而MSSQL的系统存储过程...
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。
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 ...
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)*/ ...
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...
(), true)); } // 获取插入ID $sql = "SELECT SCOPE_IDENTITY() AS 'InsertedID'"; $insertIDQuery = sqlsrv_query($conn, $sql); if($insertIDQuery === false) { die(print_r(sqlsrv_errors(), true)); } // 打印插入ID while($row = sqlsrv_fetch_array($insertIDQuery, SQLSRV_...
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...