通常，您会希望避免使用游标，因为它们会对性能产生负面影响。但是，在某些特殊情况下，您可能需要逐条记录遍历数据记录并执行一些操作。
DECLARE @orderId AS INT -- here we are creating our cursor, as a local cursor and only allowing -- forward operations DECLARE rowCursor CURSOR LOCAL FAST_FORWARD FOR -- this is the query that we want to loop through record by record SELECT [OrderId] FROM [dbo].[Orders] -- first we need to open the cursor OPEN rowCursor -- now we will initialize the cursor by pulling the first row of data, in this example the [OrderId] column, -- and storing the value into a variable called @orderId FETCH NEXT FROM rowCursor INTO @orderId -- start our loop and keep going until we have no more records to loop through WHILE @@FETCH_STATUS = 0 BEGIN PRINT @orderId -- this is important, as it tells SQL Server to get the next record and store the [OrderId] column value into the @orderId variable FETCH NEXT FROM rowCursor INTO @orderId END -- this will release any memory used by the cursor CLOSE rowCursor DEALLOCATE rowCursor