hashbytes

问题 When I execute this hardcoded, I get the correct result: Declare @result nvarchar(32) Set @result = convert(varchar(32), hashbytes('MD5', '1' + 'One' + 'Two' + 'Three'), 2) select @result Result: 4173AB4C6EE66BC1FF7B7E5D44A872CA (correct) But when I call/execute this stored procedure, giving it the same parameters, it's a different result ALTER Procedure [db_owner].[CheckTheTransaction] @DataID nvarchar(50), @Data1 nvarchar(50), @Data2 nvarchar(50), @Data3 nvarchar(50) as Declare @result

问题 I have formed a hash key with the help of HashBytes as below with the multiple fields combination on SQL. hashbytes('MD5', PID+PNumber+CONVERT(VARCHAR(50),cast(datestamp as binary)) +CONVERT(VARCHAR(50), TCount)+OCD+OSeqNbr+TID) AS VARBINARY(80) All the above fileds datatypes are below PID - nvarhcar(30) PNumber - nvarhcar(30) datestamp - Datetime TCount - Int OCD - varhcar(2) OSeqNbr - varhcar(10) TID - nvarhcar(100) But i need C# equivalent function to get the value , so that i can get the

问题 I am trying to hash the datetime column using HashBytes alter table dbo.Events add HashKey AS hashbytes('MD5', cast(convert(varchar(200), format(datestamp,'yyyy-MM-dd HH:mm:ss.ffffff')) as varbinary)) persisted but as it is non-deterministic, I get this error: Computed column cannot be persisted because the column is non-deterministic. I managed to get it done by not specifying the format as below alter table dbo.PolicyEventsFromQueue add HashKey AS hashbytes('MD5', cast( datestamp as

问题 I am creating a hash key using hashbytes on multiple columns to get performance gain which we are using right now in where clause. alter table dbo.Table1 add HashKey AS CAST(hashbytes('MD5', PID+PNumber+CONVERT([varchar] (50),[DateStamp]) +CONVERT(VARCHAR(50), TransactionCount)+OCD+ONbr+TransactionID) AS VARBINARY(80)) PERSISTED But one of the column in that is a datetime2 field which i am unable to add. While i was trying i am getting below error message "Computed column 'HashKey' in table

问题 I have created hash value using below function in sql SQL query Select hashbytes('MD5', PNumber+CONVERT(VARCHAR(50),cast(datestamp as binary),1)) From dbo.Events Now I need to get the equivalent C# function in order to get the hash value and pass it to a stored procedure. I am using below code to get the c# equivalent. But values are not matching C# Code var strDate = policyEventFromQueue.DateStamp.ToString(); var binaryvalue = Encoding.Unicode.GetBytes(strDate); var hashkey = GetMD5Hash

问题 Using SQL Server 2014 I have a table that has a nvarchar(max) column called [ASCII File] which can contain an ASCII text file of many K. I then want to do a MD5 hashbytes on that file and the resultant hash should always be 20 bytes. Well when I do a select of hashbytes('MD5', [ASCII File]) I get query completed with errors Msg 8152, Level 16, State 10, Line 4 String or binary data would be truncated. I get the same message when I try left(hashbytes('MD5', [ASCII File]), 50) I get the same