OPEN cursor_CostValue FETCH NEXT FROM cursor_CostValue INTO @OrderID WHILE @@FETCH_STATUS = 0 BEGIN UPDATE Orders SET CostValue = OrderID+100 WHERE OrderID = @OrderID FETCH NEXT FROM cursor_CostValue INTO @OrderID END CLOSE cursor_CostValue DEALLOCATE cursor_CostValue 二、While循环 将数据...
SQLServer中⽤While循环替代游标（Cursor）的解决⽅案By⾏处理数据，推荐2种⽅式：1、游标 2、While循环 我们来了解下这两种⽅案处理1w⾏数据分别需要多长时间。⼀、游标。⾸先我们填充⼀个表，⽤优雅的递归⽅式填充。create table Orders(OrderID int,CostValue decimal(18,2) );with cte_temp...
经不断的尝试,终于找到一个方法,那就是用WHILE循环来进行逐行数据处理。首先将需要处理的数据记录获取到一个临时表(此临时表包括2个重要字段:REFID - 记录行号,DealFlg:行处理标识,用1/0标识行是否已处理),然后WHILE循环对临时表进行逐行处理,SQL代码如下: While 循环 经过这样对原存储过程进行修正后,批量操作速度...
'Marketing Specialist'; OPEN Employee_Cursor; FETCH NEXT FROM Employee_Cursor INTO @EmployeeID, @Title; WHILE @@FETCH_STATUS = 0 BEGIN PRINT ' ' + @EmployeeID + ' ' + @Title FETCH NEXT FROM Employee_Cursor INTO @EmployeeID, @Title; END; CLOSE Employee_Cursor; DEALLOCATE Employee_Cursor...
OPENtemp_cursor FETCHNEXTFROMtemp_cursor INTO@tmp_data WHILE@@FETCH_STATUS=0 BEGIN SELECT@tmp_values=@tmp_values+convert(varchar(20),@tmp_data)+',' FETCHNEXTFROMtemp_cursor INTO@tmp_data END CLOSEtemp_cursor DEALLOCATEtemp_cursor UPDATEDB.dbo.OutPut_tbl ...
ENDeclare Sursors CURSOR for select u.U_UserName,u.U_ID from Users u; –where u.UserName ...
ALTER vs UPDATE when creating a new column with default value. Alternate queries for MERGE Alternative for OR in WHERE clause Alternative for PIVOT Alternative of CURSOR in SQL to improve performance ? alternative query for in clause Alternative to Full Outer Join Alternative to Row_Number Query ...
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In Microsoft SQL Server 2017, when you run a statement that includesdatetime2data type, you receive the following communication link error message: Error: 7884, Severity: 20, State: 5 NoteThis error also occurs when you us...
A. Using WHILE in a cursor The following example uses a WHILE statement to control how many fetches are done. Copy USE AdventureWorks2008R2; GO DECLARE abc CURSOR FOR SELECT * FROM Purchasing.ShipMethod; OPEN abc; FETCH NEXT FROM abc WHILE (@@FETCH_STATUS = 0) FETCH NEXT FROM abc; CL...