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なんとなくやってきたあなたへ贈るデータモデリング入門 / Minamikyushu Softw...
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Tomoka Baba
October 10, 2016
Technology
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なんとなくやってきたあなたへ贈るデータモデリング入門 / Minamikyushu Software Design Labo vol1
Tomoka Baba
October 10, 2016
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Transcript
ͳΜͱͳ͖ͬͯͨ͘ ͋ͳͨଃΔ σʔλϞσϦϯάೖ ͱ͔ ೆभιϑτΣΞઃܭLabo vol.1 2016.10.08 Sat.
ࠂ
αΠτݚڀձʢຓʣ
Έͳ͞Μ σʔλϞσϦϯάͬͯ Ͳ͏͍ͯ͠·͔͢ʁ
ͳΜͱͳ͖ͬͯͨ͘ • Ή͕࣌ؒଟ͕͔͔ͯ࣌ؒ͘Δ • ͜Ε͕ਖ਼͍͔͠Ͳ͏͔ͷࣗ৴͕࣋ͯͳ͍ • ࣮͢ΔϑΣʔζʹͳͬͯޙչ͢Δ
σʔλϞσϦϯά ͔ͬ͠ΓΓ͍ͨɻ
ࠓճͷత • ͔̍Β̍̌·ͰσʔλϞσϦϯάΛֶͿͷ ͪΐͬͱਏ͍ • ͦΕͰײ֮ʹཔΓ͗͢Δ͜ͱͳ͘Ұఆͷɹ ਫ਼Ͱૉૣ͘ϞσϦϯά͍ͨ͠ • ࠓճTࣈܗERख๏ΛϕʔεʹϙΠϯτΛɹ ߜͬͯઆ໌͢Δ
ϞσϦϯάͷྲྀΕ 1. ۀΛѲ͢Δ 2. ΤϯςΟςΟΛநग़͢Δ 3. ΤϯςΟςΟΛྨ͢Δ 4. ΤϯςΟςΟΛؔ࿈͚Δ
1. ۀΛѲ͢Δ • ྫ͑ Twitter ͩͬͨΒ − ϢʔβʔπΠʔτ͕Ͱ͖Δ − ϢʔβʔଞͷϢʔβʔΛϑΥϩʔ͢Δ͜ͱ͕Ͱ͖Δ
− ϢʔβʔϑΥϩʔͨ͠ϢʔβʔͷπΠʔτΛݟΔ͜ͱ͕Ͱ͖Δ − ಛఆͷπΠʔτʹʮ͍͍ͶʯͰ͖Δ
2. ΤϯςΟςΟΛநग़͢Δ • ྫ͑ Twitter ͩͬͨΒ − ϢʔβʔπΠʔτ͕Ͱ͖Δ − ϢʔβʔଞͷϢʔβʔΛϑΥϩʔ͢Δ͜ͱ͕Ͱ͖Δ
− ϢʔβʔϑΥϩʔͨ͠ϢʔβʔͷπΠʔτΛݟΔ͜ͱ͕Ͱ͖Δ − ಛఆͷπΠʔτʹʮ͍͍ͶʯͰ͖Δ
2. ΤϯςΟςΟΛநग़͢Δ • ίπʮ໊ࢺʯͱʮಈࢺʯʹ͢Δ͜ͱ • ͨͩ͠CRUDʹͳΔಈࢺআ͘ • ྫ͑ Twitter ͩͬͨΒ
− ϢʔβʔπΠʔτ͕Ͱ͖Δ − ϢʔβʔଞͷϢʔβʔΛϑΥϩʔ͢Δ͜ͱ͕Ͱ͖Δ − ϢʔβʔϑΥϩʔͨ͠ϢʔβʔͷπΠʔτΛݟΔ͜ͱ͕Ͱ͖Δ − ಛఆͷπΠʔτʹʮ͍͍ͶʯͰ͖Δ
2. ΤϯςΟςΟΛநग़͢Δ • ίπʮ໊ࢺʯͱʮಈࢺʯʹ͢Δ͜ͱ • ͨͩ͠CRUDʹͳΔಈࢺআ͘ • ྫ͑ Twitter ͩͬͨΒ
− ϢʔβʔπΠʔτ͕Ͱ͖Δ − ϢʔβʔଞͷϢʔβʔΛϑΥϩʔ͢Δ͜ͱ͕Ͱ͖Δ − ϢʔβʔϑΥϩʔͨ͠ϢʔβʔͷπΠʔτΛݟΔ͜ͱ͕Ͱ͖Δ − ಛఆͷπΠʔτʹʮ͍͍ͶʯͰ͖Δ ʮݟΔʯ͍ͬͯ͏ͷ CRUDͷRʢಡΈࠐΈʣ ʹ͋ͨΔ
3. ΤϯςΟςΟΛྨ͢Δ • ΤϯςΟςΟͷྨ̎छྨ − Event − ࣌Λ࣋ͭͷ − Resource
− ࣌Λ࣋ͨͳ͍ͷ
3. ΤϯςΟςΟΛྨ͢Δ
4. ΤϯςΟςΟΛؔ࿈͚Δ • R-Eܕ • E-Eܕ • R-Rܕ • ࠶ؼ
4. ΤϯςΟςΟΛؔ࿈͚Δ • R-Eܕ − ͋ΔResource͕EventΛى͜͢έʔε − جຊʮ̍ରଟʯͰ͋Δ − ྫɿϢʔβʔʢResourceʣ͕πΠʔτ͢ΔʢEventʣ
4. ΤϯςΟςΟΛؔ࿈͚Δ • E-Eܕ − ʮ̍ରଟʯʮଟରଟʯͷέʔε͕͋Δ − ઌߦˠޙଓͷؔʹͳΔʮ̍ରଟʯͷέʔε − ྫɿπΠʔτʢEventʣʹ͍͍ͶʢEventʣ͕ͭ͘
− ରԠදΛඞཁͱ͢Δʮଟରଟʯͷέʔε − ྫɿෳͷडʢEventʣʹର݄ͯ͠·ͱΊͯٻ͢ΔʢEventʣ
4. ΤϯςΟςΟΛؔ࿈͚Δ • E-Eܕ − ෳͷडʢEventʣʹର݄ͯ͠·ͱΊͯٻ͢ΔʢEventʣ
4. ΤϯςΟςΟΛؔ࿈͚Δ • R-Rܕ − جຊʮଟରଟʯͰ͋Δ − ରরදΛ࣋ͭ − ̎ͭͷؒʹ੍ଋറΛ࣋ͨͤΔResourceͱͯ͠ͷରরද
− ྫɿ͋Δސ٬ʹ͜ͷΛച͍͚ͬͯͳ͍ − ̎ͭͷؒʹࣄલࣄޙͷؔΛࣔ͢Eventͱͯ͠ͷରরද − ྫɿ͋ΔࣾһΛ͜ͷ෦ॺʹ͍ͭॴଐͤͨ͞
4. ΤϯςΟςΟΛؔ࿈͚Δ • R-Rܕ − ͋Δސ٬ʹ͜ͷΛച͍͚ͬͯͳ͍ − ͋ΔࣾһΛ͜ͷ෦ॺʹ͍ͭॴଐͤͨ͞
4. ΤϯςΟςΟΛؔ࿈͚Δ • ࠶ؼ − ̍ͭͷू߹͔ΒऔΓग़ͨ͠ཁૉͰߏ − ྫ̍ɿTwitter ͷϑΥϩʔ −
ྫ̎ɿථͳͲͷࠇॲཧ
4. ΤϯςΟςΟΛؔ࿈͚Δ
4. ΤϯςΟςΟΛؔ࿈͚Δ R-Eܕʮ̍ରଟʯ
4. ΤϯςΟςΟΛؔ࿈͚Δ R-Eܕʮ̍ରଟʯ
4. ΤϯςΟςΟΛؔ࿈͚Δ E-EܕͰઌߦˠޙଓͷؔ ͳͷͰʮ̍ରଟʯ
4. ΤϯςΟςΟΛؔ࿈͚Δ E-EܕͰઌߦˠޙଓͷؔ ͳͷͰʮ̍ରଟʯ
4. ΤϯςΟςΟΛؔ࿈͚Δ ϑΥϩʔʮ࠶ؼʯ
4. ΤϯςΟςΟΛؔ࿈͚Δ ϑΥϩʔʮ࠶ؼʯ
4. ΤϯςΟςΟΛؔ࿈͚Δ
ۀΛ࣮ݱͰ͖Δ͔֬ೝ͢Δ • ͜͜·ͰͰݟ͖͑ͯͨෆಁ໌ͳ෦ • ͓٬͞Μͱͷ͢Γ߹Θͤ • ΑΓਫ਼Λ্͍͛ͯ͘
ҙࣝ͢Δ͜ͱ • NULLΛۃྗආ͚Δ − NULLෳͷҙຯΛ࣋ͭʢ·ͩଘࡏ͠ͳ͍͚͔ͩʁόά͔ʁʣ − ৗʹNULLʹͳΔՄೳੑʹک͑Δͷਏ͍ • UPDATEΛۃྗආ͚Δ −
σʔλߋ৽ͱ͍͏ॲཧෳࡶੑΛ૿͢ • ςʔϒϧʹঢ়ଶΛۃྗ࣋ͨͤͳ͍ − UPDATEΛۃྗආ͚Δͱ͍͏ҙຯͰ
࠷ޙʹ • ͜ΕͰᘳͳΘ͚͡Όͳ͍ • Γํͻͱͭ͡Όͳ͍ • ͻͱͭͷҰ؏ͨ͠ܕΛ࣋ͭ͜ͱ • ͦͯ͠ͱʹ͔͘Λ͜ͳ͢͜ͱ •
ͦͷதͰͨ͘͞Μ௧͍ʹ͋͏͜ͱ • ࢼߦࡨޡͯࣗ͠ͷΓํΛݟ͚͍ͭͯ͘