Question

由于有完整的交易日志，我正在像这样划分大的INSERT：

DECLARE @rc INT = 1;
WHILE @rc > 0
BEGIN
  BEGIN TRANSACTION;
    INSERT INTO MyTargetTable (Id, SendId, RecipientId)
    SELECT TOP (500000) SendRecipientId, SendId, RecipientId
    FROM #SendRecipients AS s
    WHERE NOT EXISTS (
        SELECT 1 FROM MyTargetTable AS t
        WHERE t.Id  = s.SendRecipientId
    ) 
    ORDER BY SendRecipientId
  SET @rc = @@ROWCOUNT;
  COMMIT TRANSACTION;
END;

如何获取插入的行总数？

Answer 1

添加另一个变量来求和@@rowcount-您可能需要使用bigint而不是int。

DECLARE @rc INT = 1, @total bigint = 0;
WHILE @rc > 0
BEGIN
  BEGIN TRANSACTION;
    INSERT INTO MyTargetTable (Id, SendId, RecipientId)
    SELECT TOP (500000) SendRecipientId, SendId, RecipientId
    FROM #SendRecipients AS s
    WHERE NOT EXISTS (
        SELECT 1 FROM MyTargetTable AS t
        WHERE t.Id  = s.SendRecipientId
    ) 
    ORDER BY SendRecipientId
  SELECT @rc = @@ROWCOUNT, @Total += @@ROWCOUNT;
  COMMIT TRANSACTION;
END;

Answer 2

您可以尝试-更新查询。

DECLARE @rc INT = 0;
WHILE (1=1)
BEGIN
  BEGIN TRANSACTION;
    INSERT INTO MyTargetTable (Id, SendId, RecipientId)
    SELECT TOP (500000) SendRecipientId, SendId, RecipientId
    FROM #SendRecipients AS s
    WHERE NOT EXISTS (
        SELECT 1 FROM MyTargetTable AS t
        WHERE t.Id  = s.SendRecipientId
    ) 
    ORDER BY SendRecipientId
  SET @rc = @rc + @@ROWCOUNT;
  COMMIT TRANSACTION;

  IF (@@ROWCOUNT = 0)
  BEGIN
    BREAK;
  END

END;

循环中插入的行总数

2 个答案: