ืกืงื ืกืขืจืืืืจืขืจ - ืึท ืืื ืฆืืง ืคึผืจืึธืืืงื ืืืึธืก ืงืขื ืขื ืึทืจืืขืื ืืื ืึท ืจืืืืง ื ืืืขืจ ืคืื ืืื ืคึฟืึธืจืืึทืฆืืข ืืึทืืึทืืืืกืื ืืื ืคึผืขืจืคืึธืจืื ืคึผืจืึธืืจืึทืืืื ื ืืื ืึทืืืื ืืกืืจืึทืฆืืข ืคืึทื ืืงืฉืึทื ื.
ืึทืืืื ืืกืืจืึทืฆืืข ืคืื โโืึท sql ืกืขืจืืืขืจ ืื ืืืึทืืืื ืื ืึทื ืืืืืงืืื ื ืคืื ืึท ืืื ืคึฟืึธืจืืึทืฆืืข ืืึทืืข ืกืืกืืขื, ืื ืฉืึทืคืื ื ืคืื ืึท ืืืืขืจืืืื ืกืืกืืขื, ืื ืืึทืืืื ื ืคืื ืึท ืืึทืืึทืืืืก, ืึทืืืืฉืขืงืฅ, ืืื ืืืื ืขืก ืืขืืืขื ืคึฟืึทืจ ื ืืฆืขืจืก ืฆื ืึทืงืกืขืก ืื ืืื ืคึฟืึธืจืืึทืฆืืข ืื ืืืฆื ืืื ืื ืืึทืืึทืืืืก.
ืืขืจ ืึทืืืื ืืกืืจืึทืืึธืจ ืงืจืืืืฅ ืคึผืืจืืึทืืืงืื ืืึทืงืึทืคึผ ืงืืคืืขืก, ืืฉืขืงืก ืื ืึธืจื ืืืขืืงืืึทื ืคืื ืื ืืื ืคึฟืึธืจืืึทืฆืืข ืกืืกืืขื ืืื ืงืึธื ืืจืึธืืก ืื ืขืจืืืืื ืืึทื ื ืคืื ืืื ืคึฟืึธืจืืึทืฆืืข ืืขืงืขืก ืืื ืืจืึทื ืกืึทืงืืืึธื ืืึธืืก.
DB ืืื ืึท ืืขืจืืคึฟื ืืึทื ื ืคืื ืื ืืขืจืจืืืืืืื ืงืึทืืคึผืึธืื ืึทื ืฅ
ืื ืืึทืืึทืืืืก ืืื ืืขืจืืื ืืืจื ืึท ืกืคึผืขืฆืืขื ืกืืกืืขื, ืืืึธืก ืืื ืึท ืงืึธืืคึผืืขืงืก ืคืื ืฉืคึผืจืึทื ืืื ืืืืืืืืืจื ืืืฉืืจืื ืืืึธืก ืืึทืืื ืืืึทื ืฉืืืืืช ืืื ืึธืจืืึทื ืืืืจื ืึท ืฉื ืขื ืืืื ืคึฟืึทืจ ืื ื ืืืืืง ืืื ืคึฟืึธืจืืึทืฆืืข.
ืืึทืืึทืืึทืกืข ืกืืจืึทืงืืฉืขืจืื ื
ืฆื ืึธืจืืึทื ืืืืจื ืึท ืืืื-ืงืืืึทืืืืขื ืืื ืคึฟืึธืจืืึทืฆืืข ืืึทืืข, ืืขืจ ืึทืืืื ืืกืืจืึทืืึธืจ ืืืื ืฆืืืึทื ื ืขืก ืคึฟืึทืจืึทื ืืืืึธืจืืืขืืงืืื, ืืืจืืงืืงื ืื ืคืืืข ืึธืคึผืฆืืขืก ืคึฟืึทืจ ื ืืฆื ืื ืื ืืืฆื ืืื ืคึฟืึธืจืืึทืฆืืข, ืฆืืฉืืขืื ืืขืืืขื ืื ืืึทืืจืืืฉืึทื ืืื ืื ืืขืจืข ืกืืกืืขืืขื ืืื ืึทืงืกืขืก, ืืื ืืขืืื ื ืืื, ื ืืฆื ืืึธืืขืจื ืืขืงื ืึทืืึทืืืฉืื, ืืึทืื ืื ืคืืจืืื ืื ืขื ืืขืจืื ืืขื ืฆื ืื ืกืืกืืขื.
SQL ืกืขืจืืืขืจ ืึทืืืื ืืกืืจืึทืฆืืข ืืื ืืืจืืืขืงืึธืื ืืื ืฆืืืื ืืืขืจืกืืขืก
ืืขืจ ืขืจืฉืืขืจ ืืื ืึท ืืขืงืข ืกืขืจืืืขืจ, ืืื ืืืึธืก ืื ืืึทืืึทืืืืก ืืื ืืืื ืืืืฃ ืึท ืืขืงืข ืกืขืจืืืขืจ; ืขืก ืืื ืกืืึธืจืืืืฉ ืคืื ืื ืืื ืคึฟืึธืจืืึทืฆืืข ืืึทืืข ืืื ืึทืงืกืขืก ืฆื ืขืก ืืืจื ืงืืืืึทื ืฅ ืคืืืกื ืืืง ืืืืฃ ืคืึทืจืฉืืืขื ืข ืงืึธืืคึผืืืืขืจืก. ืคึผืจืึทืกืขืกืื ื ืืื ืืขืคืืจื ืืืืก ืืืืฃ ืืืขืจืงืกืืืืฉืึทื ื ืืื ืืืืืึทืืืืก ืืขืงืขืก ืืขื ืขื ืืจืึทื ืกืคืขืจื. ืื ืคืขืจืืขื ืืขืืข ืงืึธืืคึผืืืืขืจืก ืคืื ืงืืืืึทื ืฅ ืืึธืื ืึท ืงืึธื ืืจืึธื ืกืืกืืขื ืืืึธืก ืคึผืจืึทืกืขืกืึทื ืื ืืจืึทื ืกืืืืืขื ืืื ืคึฟืึธืจืืึทืฆืืข.
ืืขืจ ืงืืืขื ื-ืกืขืจืืืขืจ ืืืขืจืกืืข, ืืื ืึทืืืฉืึทื ืฆื ืืืืขืจืืืื, ืคึผืจืึทืกืขืกืึทื ืื ืืื ืฆืข ืืึทื ื ืคืื ืืึทืื. ื ืืงืฉื ืืขืฉืืงื ืคึฟืึทืจ ืืืจืืคืืจืื ื, ืืจืืืก ืืืจื ืืขืจ ืงืืืขื ื, ืคึผืจืึทืืืึธืืงืก ืึท ืืืื ืืื ืจืืืจืืืืึทื ืคืื ืื ื ืืืืืง ืืื ืคึฟืึธืจืืึทืฆืืข. ืื ืืื ืคึฟืึธืจืืึทืฆืืข ืืื ืืจืึทื ืกืคึผืึธืจืืึทื ืืืืขืจ ืื ื ืขืฅ ืคืื ืื ืกืขืจืืืขืจ ืฆื ืืขื ืงืืืขื ื.
ืืขืจ ืงืืืขื ื-ืกืขืจืืืขืจ ืืืฉืืืื ืคืื ืฆืืืื ืืืืื: ืงืืืขื ื ืืื ืกืขืจืืืขืจ.
ืืขืจ ืงืืืขื ื ืืื ืืืื ืืืืฃ ืึท ืคึผืขืจืืขื ืืขื ืงืึธืืคึผืืืืขืจ; ืขืก ืคึผืขืจืคืึธืจืื ืื ืคืึทื ืืงืฉืึทื ื ืคืื ืคึผืจืึทืืืืืืื ื ืึท ืืจืึทืคืืงืึทื ืฆืืืื ื.
ืืขืจ ืกืขืจืืืืจืขืจ ืืืื ืืื ืืืื ืืืืฃ ืืขืืึทืงืืืืึทื ืกืขืจืืืืจืขืจ ืืื ืงืึทื ืืจืืืืืฅ ืฆื ืื ืื ืืึท ืคืื ืืื ืคึฟืึธืจืืึทืฆืืข ืืึทื ืืืืืื ื, ืืื ืคึฟืึธืจืืึทืฆืืข ืืึทืืข ืคืึทืจืืืึทืืืื ื, ืึทืืืื ืืกืืจืึทืฆืืข ืืึทืืื ืื ืืก ืืื ืืืืขืจืืืื ืืืืืขื.
ื ืงืืืขื ื-ืกืขืจืืืขืจ ืกืืกืืขื ืืื ืงืขืจืึทืงืืขืจืืืื ืืืจื ืื ื ืืฆื ืคืื ืึท ืกืคึผืขืฆืืขื ืฉืคึผืจืึทื ืืขืื ืืง ืืืึธืก ืกืืจืึทืงืืฉืขืจื ืงืืืืจืื ืืื ืืืื ืืื ืขืคืขืงืืืื ืืืฉืืจืื ืคึฟืึทืจ ืึทืงืกืขืก ืื ืืึทืืึทืืืืก.