GDB of CS-403 Data base management System (due date is 30 July, 2010)

[Xpert]

Topic:"We use ER Data Model in conceptual database design instead of using other models but we never use ER data model in our logical database design" Justify this statement.

[ayb]

Conceptual database designs is used to define the objects and relations between them. ER diagram is best suited for defining relation and there respective functions. This model is flexible enough to bear a change with out any harm to other data's structure. ER data base model represent association. which is needed to define relations.

Logical database model is some what advanced of this model. In this model you need to define keys, attributes, behaviors and foregn keys to be inherit and possible representation which can be converted into physical data models. here we do not need association and other functionalities thats why we did not use ER diagrams.

[Xpert]

achi copy paste ker letay ho faraz.
is bar lagta hai sab kay zero hi ayen gay

[asad]

fraz abi new hy
kuch to khiyal karo.......................


thanks mr ayb

[ayb]

welcom asad bhai
no prob esa b hota hy aksar

[Xpert]

so jo hona tha ho gia...

[asad]

in which smester u r?

[asad]

so jo hona tha ho gia...

ab kia ho gia

[Xpert]

I am in final semester of mcs.

[viki]

hmmmm final semester to mushqil hota hia ji

[Anamzahra]

A-o-A
how are you all

[ahsan_ali]

We are all fine and gorgeous !

[Rashida Iqbal]

aoa
dear administrator i'm in mcs 2nd sem can u guide me??????????

[Xpert]

ws,
Yes dear tell me what kind of guidance you are looking for?

[asad]

aoa
dear administrator i'm in mcs 2nd sem can u guide me??????????


wa/slam
welcome rashid iqbal
im also in mcs 2nd smes nice to meet u