Writing deadlock-proof code is really hard. Even when you access the tables in the same order you may still get deadlocks [1]. I wrote a post on my blog that elaborates through some approaches that will help you avoid and resolve deadlock situations. If you want to ensure two statements/transactions will never deadlock you may … Read more
How much writing vs. reading of this table(s) do you expect? I’ve used a single audit table, with columns for Table, Column, OldValue, NewValue, User, and ChangeDateTime – generic enough to work with any other changes in the DB, and while a LOT of data got written to that table, reports on that data were … Read more
From the pyodbc documentation To call a stored procedure right now, pass the call to the execute method using either a format your database recognizes or using the ODBC call escape format. (The ODBC driver will then reformat the call for you to match the given database.) For SQL Server you would use something like … Read more
You’re probably looking forwith (updlock, holdlock). This will make a select grab an exclusive lock, which is required for updates, instead of a shared lock. The holdlock hint tells SQL Server to keep the lock until the transaction ends. FROM TABLE_ITEM with (updlock, holdlock)
With cte as ( select top(1) shipfirtsname From ShipBillInfo where CustomerId=’134′ order by OredrGUID desc) Update cte set shipfirstname=”abc”;
1st off, You don’t need programming stuff. You can directly upload CSV files into SQL Database with SQL management tools. However, if you really need do it through programming, Just read below. Personally, I think this approach is the most efficient and easiest way to do through programming. In general, you can achieve it in … Read more
If you want to specify the column name and override the property name, you can try the following: Using Annotations public class Job { [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)] [Column(“CustomIdName”)] public Guid uuid { get; set; } public int active { get; set; } } Using Code First protected override void OnModelCreating(DbModelBuilder mb) { base.OnModelCreating(mb); mb.Entity<Job>() .HasKey(i => … Read more
It should be possible to create a sequential GUID in c# or vb.net using an API call to UuidCreateSequential. The API declaration (C#) below has been taken from Pinvoke.net where you can also find a full example of how to call the function. [DllImport(“rpcrt4.dll”, SetLastError=true)] static extern int UuidCreateSequential(out Guid guid); The MSDN article related … Read more
Yes. add a linked server entry, and use select into using the four part db object naming convention. Example: SELECT * INTO targetTable FROM [sourceserver].[sourcedatabase].[dbo].[sourceTable]
1) Download the JDBC Driver here. 2) unzip the file and go to sqljdbc_version\fra\auth\x86 or \x64 3) copy the sqljdbc_auth.dll to C:\Program Files\Java\jre_Version\bin 4) Finally restart eclipse