Length of varbinary(max) filestream on SQL Server 2008

问题

Is there some efficient way how to get length of data in "varbinary(max) filestream" column? I found only samples with conversion to varchar and then calling the "LEN" function.

回答1:

SELECT
      length = DATALENGTH(Name),
      Name 
FROM 
      Production.Product 
ORDER BY 
      Name

"Returns the number of bytes used to represent any expression."

T-SQL and quote taken from MSDN's DATALENGTH (Transact-SQL) library.

来源：https://stackoverflow.com/questions/748165/length-of-varbinarymax-filestream-on-sql-server-2008