diff. between Web Services and API

Short and brisk answer would be WebServices is a service oriented API based on the internet.

An API is a set of classes normally compiled in form of a DLL.

While WebServices reside over the internet medium providing services over the internet to its consumer using Http and SOAP protocols.

API is used by adding a component reference

WebServices are used by adding a Web Reference.


friends this content i get from google search...u may have better answer

sql funda

Primary key allows each row in a table to be uniquely identified and ensures that no duplicate rows exist and no null values are entered.

Unique key constraint is used to prevent the duplication of key values within the rows of a table and allow null values. (In oracle, one null is not equal to another null).

---
1)unique key can be null but primariy key cant be null.

2)primariy key can be refrenced to other table as FK.

3)we can have multiple unique key in a table but PK is one and only one.

4)PK in itself is unique key.

Friends i have got this from net.. you may have better answer....

Adbrite...

Its nice way to earn via Adbrite..

i have trust over this...


My Message to View of My Blog..


You can also earn money via Adbrite


Thank you..

This is my first Post

Here i am newer....


i want to earn $ via advertises,. so give any suggestion ..

thank you