Please update the connection string in the web config file.

The local database mdf file can be used for the database with updated connection string or create new database and run the following query against that database.

Create database TransactionData ( Id int primary key identity(1,1), Account nvarchar(100) not null, Description nvarchar(1000) not null, CurrencyCode nvarchar(20) not null, Amount decimal(10,2) not null )