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@yoursks @Hudx @Nayab_Chauhdary @Redvirus @Lightman

@Ally you ko ata ha ye to btao

@Mahen

miss ap ka sawal bht confusing hai.. differentiate karnay ka kia matlib hai....

Yeah database system ka internal model aur us ka structure hai.. yeah bata raha hai keh phyical devices peh data store kaisay hota. hai... aur us ko access kaisay kartay hian.. ap ne jo opr moedel dia hai.. ess main koi difference nahi hai.. yeah sirf aik diagaram jo explain kar rahi keh keh employee ki information kaisya database main store hoti hai aur DMBS kaisay external/logical mapping se check kr ke kaisay sahi result batata hai.. ess mian koi rocket science nahi hia... ap meray khiyal main DMBS kay basic concept samj le yeah figure sirf DMBS ka structure explain kr rahi hai.. kah record jab external level peh paas hotay hain tau kuch fields hidden ho jati hain aur fields rearragne kaisay hoti hai... waghaira wahgaira ..

meray khiyaaal main database ki book se aik figure utha kr laga dena... or insan kisi se bhi pochay keh ess mian difference samja do yeah bht ghalat tareeqqa hai kisi bhi concept ko samjanay ka... ap ko chahe pehlay pooora data base mangement system parhain... or khud samjain... shortcut is longest way to reache the destination... ab mian aik tasveer laga doon.... out of context or logon ko kahin keh yeah mje samja do... tau main apni taraf se bht oncha ho jaon ga keh log kahian ke waah ji waah ji ... horror tau bht paraku hai ... yeah tau bht bara tipu sultan hai... ess kay sawalon ka jowab koi nahi de skta... yeah ghalat baaat hai.... Yeah sirf aik diagram hai jo ao Database ki book main milay gi.. ess mian koi rocket science nahi hia...