将MySQL时间戳字段转换为SQL Server 2005日期字段

Question

I have been Googling this for more than an hour now, without any luck.

Imported a MySQL database via CSV into MS SQL Server 2005, where a Tstamp (timestamp) field has been hassling me.

How do I convert the tstamp field into a SQL date field?

Select *,
  DATEADD(SECOND, field8047, 1970/01/01) as datetime_created_calc
  From [Majestic].[dbo].[hdiyouth]

New error message: Msg 8116, Level 16, State 1, Line 1 Argument data type varchar is invalid for argument 2 of dateadd function.

Answer 1

I guess that field8047 is a varchar field.

Try this:

Select *,
  DATEADD(SECOND, cast(field8047 as int), '19700101') as datetime_created_calc
  From [Majestic].[dbo].[hdiyouth]

Answer 2

Assuming you have a VARCHAR() that represents a numeric type, and that numeric type represents the number of seconds from a fixed date.

CAST your VARCHAR() into a numeric type.

Then use that number in DATEADD().

If the number is too big, break it up into DAYS and SECONDS.

SELECT
  DATEADD(
    DAYS,
    CAST([hdiyouth].[Tstamp] AS BIGINT) / (60*60*24),
    DATEADD(
      SECONDS,
      CAST([hdiyouth].[Tstamp] AS BIGINT) % (60*60*24),
      0
    )
  )
FROM
  [Majestic].[dbo].[hdiyouth]

If it's giving the right time, but the wrong date, change the 0 to whatever date your timestamp should be based from.

Answer 3

cast your field to integer.

Select  DATEADD(SECOND, CAST(field8047 AS INTEGER), '1970/01/01')
Select  DATEADD(SECOND, CAST('60' AS INTEGER), '1970/01/01')