hi Mr barry
until now i didn't understand why you use a ref tables in school manegment system.
forexample,why you use a ref_person_type table?
what is the difference between person_type_code in ref_person_type table and person_id in person table?
thanx in advance Continue

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hello sir,
I am student of MCA V th semester.i want do project on smart city.so please give me
detail of that project.
Thanks.

i am designing a database for inventory the field requirements vary a lot depending on the product nature? The fields for Digital Cameras (number of pixels, maximum zoom, type of storage) would be very different from say, Hard Disks (capacity, interface type, speed, form-factor).

i hav a tables with the shema

product
proid int
prodname varchar
proattribute xml
catid int


category
catid int
catname vachar
prodincatattribut (xsd)

how can i be to able to store the attribute for a category of pr… Continue