11-7
ﺕﺎﻧﺎﻴﺒﻟﺍ ﺭﺎﻴﺘﺧﺍ k
ﻱﺬﻟﺍ () ﺩﻮﺳﻷﺍ ﺭﺎﻴﺘﺧﻻﺍ ﺮﺷﺆﲟ ﺎﻬﻴﻟﺍ ﺓﺭﺎﺷﻹﺍ ﻢﺘﻳ ﻲﺘﻟﺍ ،ﺎﻴﻟﺎﺣ ﺔﻠﻠﻈﳌﺍ ﺩﻮﻨﺒﻟﺍ ﺭﺎﻴﺘﺧﻻ 1(SELECT) ﻰﻠﻋ ﻂﻐﺿﺍ •
.ﺮﺷﺆﳌﺍ ﺭﺎﻴﺘﺧﺍ ﺀﺎﻔﺘﺧﺎﺑ ﺐﺒﺴﺘﻳﻭ ،ﺩﻮﻨﺒﻟﺍ ﺭﺎﻴﺘﺧﺍ ﻲﻐﻠﻴﺳ
ﹰ
ﺎﻀﻳﺃ
1(SELECT) ﻰﻠﻋ ﻂﻐﻀﻟﺍ .ﺎﻬﺒﻧﺎﺠﺑ ﺮﻬﻈﻳ
.ﺕﺩﺭﺃ ﺍﺫﺇ ،ﺓﺩﺪﻌﺘﳌﺍ ﺕﺎﻔﻠﳌﺍ ﺭﺎﻴﺘﺧﺍ ﻚﻨﻜﳝ •
→
1(SELECT)
←
ﻊﻴﻤﺟ ﺭﺎﻴﺘﺧﺇ ﻲﻐﻠﻳ ﺪﻠﺠﻣ ﻭﺃ ﺔﻋﻮﻤﺠﻣ ﺭﺎﻴﺘﺧﺍ ﺀﺎﻐﻟﺇ .ﻪﻠﺧﺍﺩ ﺀﻲﺷ ﻞﻛ ﺭﺎﻴﺘﺧﺍ
ﹰ
ﺎﻀﻳﺍ ﻢﺘﻳ ﺪﻠﺠﻣ ﻭﺃ ﺔﻋﻮﻤﺠﻣ ﺭﺎﻴﺘﺧﺎﺑ •
.ﺎﻬﺗﺎﻳﻮﺘﺤﻣ
w
→
ﻲﻓ () ﺩﻮﺳﻷﺍ ﺭﺎﻴﺘﺧﻻﺍ ﺮﺷﺆﻣ ﺮﻬﻈﻳ ،ﺪﻠﺍ ﻭﺃ ﺕﺎﻧﺎﻴﺒﻟﺍ ﺔﻋﻮﻤﺠﻣ ﻞﺧﺍﺩ ﺔﻴﺼﺨﺸﻟﺍ ﺩﻮﻨﺒﻟﺍ ﻦﻣ ﺮﺜﻛﺃ ﻭﺃ ﺪﺣﺍﻭ ﺕﺮﺘﺧﺍ ﺍﺫﺍ •
.ﺪﻠﺍ ﻭﺃ ﺔﻋﻮﻤﺍ ﻢﺳﺍ ﺐﻧﺎﺠﺑ (
) ﺾﻴﺑﻷﺍ ﺭﺎﻴﺘﺧﻻﺍ ﺮﺷﺆﻣ ﺮﻬﻈﻳ ﺎﻣﺪﻨﻋ ،ﺪﻨﺑ ﻞﻛ ﺐﻧﺎﺟ
J
→
.ﺎﻴﻟﺎﺣ ﺓﺭﺎﺘﺍ ﺩﻮﻨﺒﻟﺍ ﻊﻴﻤﺟ ﺭﺎﻴﺘﺧﺍ ﺀﺎﻐﻟﺈﺑ ﻡﻮﻘﻳ Memory ﻊﺿﻮﻠﻟ ﺔﻴﻟﻭﻷﺍ ﺔﺷﺎﺸﻟﺍ ﻰﻟﺍ ﺓﺩﻮﻌﻟﺍ •
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