Cons. 1  Cannot span multiple databases... at least not easily. 2  All entities (tables, views, etc) need a primary key. 3  If you want to update a single column in a 100+ required columns table (not my table design), you have to pull down all 100 columns to make the update. Or use a Stored Procedure. I've had issues with some default values defined on SQL server not getting pulled into the entity model after a new record gets added. Usually this is with computed values, or values that get added in an INSERT Trigger On occasion, the SQL queries get badly written and are slow to execute.
Buying in advance is cheaper than buying at the station on the day and you could save an average of 43% on your train ticket. Advance tickets usually go on sale 12 weeks in advance, so the earlier you book the more likely you are to save.Ticket Alert.uying in advance is cheaper than buying at the station on the day and you could save an average of 43% on your train ticket. Advance tickets usually go on sale 12 weeks in advance, so the earlier you book the more likely you are to save. Ticket Alert.
But really all you need is the PNR number (see example ticket below). I use the Italian version of the website because itâs very straightforward (and last I checked, the English version of the site was not very easy to use). Note that you cannot buy train tickets online earlier than 90 days before the date of travel. So if you do a search for your route and it says your âsolution is not availableâ, donât assume tickets are sold out. More likely, itâs more than 90 days in advance or youâre trying to book a slow train.