Which is better web service or direct database access?
Direct database access couples you tightly to the schema. Any changes on either end affects the other. But it’s got the virtues of being simple and requiring one less network hop. A web service means better abstraction and looser coupling via one additional level of indirection. A web service can act as the single steward of the data.
How to link to a data service-access?
For example, the AdventureWorks Web Service data connection has an Orders table that can accept a value for Location, and use that value to limit the records that you can access by using the link. You set the parameter value for a Data Service connection when you create the linked table.
Do you need a data service connection file?
You must already have the Data Service connection file, which is supplied by the Data Service provider. The general process of using Data Service data is as follows: Obtain a Data Service data connection file. Install the Data Service data connection by using the connection file.
Where do I find the data service definition file?
In the Select a connection definition file dialog box, browse to and select the XML file that contains the description of the Data Service. Note: This file is provided by the Data or Web Service provider, or by your system administrator. To enable the Data Services button, Microsoft .NET 3.5 or later must be installed.
Can a relational database run as a web server?
The trend is for database server programs to run as one operating system process with multiple kernel threads. This is an implementation detail, however, that doesn’t affect the logical structure that you see in the schematic. For a properly engineered RDBMS-backed Web site, the RDBMS client is the Web server program, e.g., AOLserver.
How does adding a web service in between help?
In contrast, adding a web service in between lets you evolve the interface to mobile clients in more manageable ways: for example, you could keep the old interface in place, add a new one that works “in parallel” with it, and then entirely restructure your database without breaking a single client.
What’s the difference between a relational and non-relational database?
Relational databases use tables that are all connected to each other. Non-relational databases, on the other hand, are document-oriented. Unlike tables, which are responsible for a single type of data, they can store information under different categories, which all depend on different commands.