varbinary

问题 I have a varbinary(8000) database field in SQL Server that I want to pull out. The sqlsrv limit for varbinary data is 8000. However if I do a select on the data <?php $query = " SELECT myvarbinary FROM table WHERE id = 48033; "; $results = sqlsrv_query($this->conn, $query); return sqlsrv_fetch_array($results, SQLSRV_FETCH_NUMERIC); Then the sqlsrv_fetch_array gives an error: PHP Fatal error: Invalid sql_display_size Truncation solution (works but no use) If I convert the field to varbinary

问题 I will post this sample for anybody who need help with insert file to varbinary(max) field in sqlsrv DB. Also if you need to read from varbinary field, you can see how I made that. This code is working but all your comments and suggestions are welcome. This is sample table: CREATE TABLE [dbo].[files] ( [id] [int] NOT NULL IDENTITY(1, 1), [content] [varbinary] (max) NULL, [filename] [varchar] (max) COLLATE Croatian_CI_AS NULL ) First enter your data for server that you use. If you need to

问题 Is there a function in SQL Server to do that? to reverse sys.fn_varbintohexstr ? 回答1: select convert(varbinary（max),@hex,2) from foobar 回答2: You need to use the hexadecimal character string in a dynamic SQL statement, so that it will be parsed as a varbinary. Here's one example of how to do that. -- Our original and fn_varbintohexstr values: DECLARE @original varbinary(max) = 0xd0cf11; DECLARE @sql nvarchar(max) = N'SET @converted = ' + sys.fn_varbintohexstr(@original) + ';'; -- Do the

问题 I am using NLog to log in my application and as part of that we are logging the customer number, which is a string in C#, and a varbinary(32) in the database. I am using the following SQL code for this specific parameter. The rest of the SQL statement works fine: CONVERT(varbinary(32), @CustNumber) and the following NLog parameter: <parameter name="@CustNumber" layout="${event-context:item=CustNumber}" /> and the following code in C# to add the Nlog parameter: myEvent.Properties.Add(

问题 As far as I know the maximum value you can define "manually" is 8000 -> varbinary(8000) which, as far as I know, means 8000 bytes -> 7,8125 KByte . Is it possible to set max to 2 MB ? Something ike varbinary(2097152) , or shall I set it to varbinary(max) and check the file size through my upload/sql insert script? 回答1: You could use a CHECK CONSTRAINT to ensure the size is below 2MB: CREATE TABLE dbo.T ( ID INT IDENTITY, VarB VARBINARY(MAX) ); ALTER TABLE dbo.T ADD CONSTRAINT CHK_T_VarB__2MB

问题 Is it possible to insert a file in a varbinary(max) column in Transact-SQL? If yes, I would be very please to have a code snippet to at least give me an idea how to do that. Thanks 回答1: It's so easy - once you know it! :-) Found this on Greg Duncan's blog a while ago: INSERT INTO YourTable(YourVarbinaryColumn) SELECT * FROM OPENROWSET(BULK N'(name of your file to import)', SINGLE_BLOB) AS import And here's the MSDN library documentation on it. Marc 来源： https://stackoverflow.com/questions

问题 Today I have been trying to get an image to save into a database, and I really can't figure it out. I have made the following table ( Afbeeldingen ): id:int afbeelding1:varbinary(max) Imported it with a Linq-to-SQL class, wrote a WCF service for it: [OperationContract] public void setAfbeelding(Afbeelding a) { dc.Afbeeldings.InsertOnSubmit(a); dc.SubmitChanges(); } And then in my xaml page I try to to create an Afbeelding , but I can't put the Byte[] as a varbinary . I don't know how to do

问题 I'm trying to query a varbinary column that contain a file (1,2 Gb). I'm using Entity Framework. See below: Database to test CREATE TABLE [dbo].[BIGDATA] ( [id] [bigint] IDENTITY(1,1) NOT NULL, [BIGDATA] [varbinary](max) NULL, CONSTRAINT [PK_BIGDATA] PRIMARY KEY CLUSTERED ([id] ASC) ) ON [PRIMARY] Data to test (any file with 1 Gb) INSERT INTO [dbo].[BIGDATA]([BIGDATA]) VALUES ((SELECT BulkColumn FROM OPENROWSET(BULK N'C:\BigTest.txt', SINGLE_BLOB) AS Document)) Controller to download file

问题 I'm trying to create a little test application which reads chunks of a FileStream and appends it to a VarBinary(max) column on an SQL Server 2005 Express. Everything works - the column gets filled as it's supposed to, but my machine still seems to buffer everything into memory and I just can't see why. I'm using the following code (C#): using (IDbConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings[1].ConnectionString)) { connection.Open(); string id = Guid.NewGuid

问题 What is the max size of a file that I can insert using varbinary(max) in SQL Server 2008 R2? I tried to change the max value in the column to more than 8,000 bytes but it won't let me, so I'm guessing the max is 8,000 bytes, but from this article on MSDN, it says that the max storage size is 2^31-1 bytes: varbinary [ ( n | max ) ] Variable-length binary data. n can be a value from 1 through 8,000. max indicates that the maximum storage size is 2^31-1 bytes. The storage size is the actual