SQL WHERE clause with binary

问题

I have a SQL Server database table with a varbinary(max) column (i.e. Data VarBinary(max) in a create table command).

Is it possible to do a where clause with some kind of pattern matching within the binary data?

For example, using the C# .NET SqlCommand object, I found that I can do a query like select * from TableName where Data = 0x4638763849838709 go, where the value is the full data column value. But I want to be able to pattern match just parts of the data, like select * from TableName where Data = 0x%3876% go.

Thanks.

回答1:

For the example you have given in the question

WITH t(c) AS
(
SELECT CAST(0x4638763849838709 AS VARBINARY(MAX)) 
)
SELECT *
FROM t
WHERE CHARINDEX(0x3876,c) > 0

回答2:

SQL Server doesn't provide any functions to search through VARBINARY fields, so this is not possible.

See this related SO question and answers.

Essentially, you will need to extract the binary information and use a tool that understands the format it is in to search through it. It can't be done directly in SQL Server.

回答3:

Taking a shot in the dark here, but you could convert the field to VARCHAR(MAX) first, then compared using a LIKE statement.

E.g.

SELECT *
FROM TableName
WHERE CONVERT(VARCHAR(MAX), Data) LIKE '%2345%'

来源：https://stackoverflow.com/questions/5765018/sql-where-clause-with-binary