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DDD Overview in 中国DB勉強会
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Shinsuke Abe
July 18, 2015
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DDD Overview in 中国DB勉強会
中国DB勉強会でハンズオンをする前に押さえておくDDDの概要です。
Shinsuke Abe
July 18, 2015
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Transcript
DDD Overview in தࠃDBษڧձ Ѩ෦ ৴հ
ࣗݾհ Ѩ෦ ৴հ(@mao_instantlife) #Rࣾ νʔϜϦʔμʔ(≒雑⽤用係) ύλʔϯϥϯήʔδɺφϨοδϚωδϝϯτ ғޟɺ࢝Ί·ͨ͠
͜ͷηογϣϯͷత DDDΛಡΜͩ͜ͱͳ͍ਓʹ͚ͯɺ ֓ཁΛઆ໌͠ɺ ಡΉͨΊͷΤοηϯεΛཧղͯ͠Β͏͜ͱ
࣭ DDDͱ͍͏ݴ༿Λௌ͍ͨ͜ͱ͕ͳ͍ਓʁ DDD͕Կͷུ͔ͩΒͳ͍ਓʁ DDD͕όζͬͯΔ͔ΒؾʹͳΔਓʁ
ΞδΣϯμ 5ͰΘ͔ͬͨؾʹͳΔDDD ίΞυϝΠϯͱʁ Ϟσϧͱʁ ·ͱΊ
5ͰΘ͔ͬͨؾʹͳΔDDD
υϝΠϯۦಈઃܭ(ࠓ࢈ۀ) ઃܭΛਐΊΔͨΊͷΞϓϩʔν ιϑτΣΞϓϩδΣΫτͰ·ͣҙΛ͏͖ͳ ͷɺυϝΠϯͱυϝΠϯϩδοΫͰ͋Δ ෳࡶͳυϝΠϯͷઃܭϞσϧʹج͖ͮ͘Ͱ͋Δ
–Eric Evans(from υϝΠϯۦಈઃܭ) “ιϑτΣΞͷ֩৺ɺυϝΠϯʹؔ࿈ͨ͠ ΛϢʔβͷͨΊʹղܾ͢ΔೳྗͰ͋Δɻ”
ઃܭΛਐΊΔͨΊʹ ίΞυϝΠϯʹूத͢Δ υϝΠϯͷ࣮Ո(υϝΠϯΤΩεύʔτ)ͱιϑτ ΣΞͷ࣮Ո(։ൃऀ)͕ɺڠۀΛ௨ͯ͡ϞσϧΛ୳ ٻ͢Δ ໌֬ʹڥք͚ͮΒΕͨίϯςΩετͷதͰɺϢϏΩ λεݴޠʹΑͬͯձ͢Δ
ςΩετ ઃܭͰ͜ΕΛࢥ͍ු͔ͨਓɺΞτʔ Excelํ؟ࢴ
–Shinsuke Abe “ઃܭߦҝͰ͋ΓɺͦͷΞτϓοτߦҝʹج ͍ͮͨͰͳ͚ΕͳΒͳ͍”
ํ؟ࢴ͕ઃܭͰͳ͍ཧ༝ ߦҝͱΞτϓοτͷॱং͕ٯ Ξτϓοτʹنఆ͞Εͨߟ͑ํ Ξτϓοτʹ͋Θͳ͍ͷ͕ഉআ͞ΕΔՄೳੑ
ςΩετ ઃܭͱ͍͏ߦҝ
–Micheal Hunger “Ͳͷʹݴ͑Δ͜ͱͰ͕͢ɺઐՈͱ͍͏ͷ ɺৗੜ׆ͰΘΕΔݴ༿ͱશ͘ҟͳͬͨݴ ༿Λ͏ͷͰ͢ɻ”
ίΞυϝΠϯͱʁ
ίΞυϝΠϯ ରͱͳΔϏδωεͷࣝྖҬ ιϑτΣΞ͕ՁΛൃش͢Δॴ υϝΠϯΤΩεύʔτͱ։ൃऀ͕ڞ༗͖͢ͷ
ςΩετ ৠཷ ͔ࣝΒෆ७ΛऔΓআ͘ɻ
நԽ υϝΠϯΤΩεύʔτͷࣝߏ͕ର ΤϯδχΞͷಘҙ ࣝߏ͔Βݴ༿(ϢϏΩλεݴޠ)͕࢈·ΕΔ
ςΩετ ϨΠϠʔυΞʔΩςΫνϟ ίΞυϝΠϯʹूத͢ΔͨΊʹࣝͷྖҬΛ ʹ͢Δɻ
ؔ৺ͷ ϢʔβΠϯλʔϑΣΠε ΞϓϦέʔγϣϯ υϝΠϯ(Ϗδωεͷ֩৺) ΠϯϑϥετϥΫνϟ(ٕज़ج൫)
ςΩετ ؔ৺ͷ ࣝࠞ͟Γ߹͏ͱཧղΛ͛Δɻ Ϗδωεͱٕज़ͷ͚͍ࣝͨɻ
Ϟσϧͱʁ
ςΩετ Ϟσϧ ରͱͳΔࣝΛநԽͯ͠ߏԽ͢Δɻ
υϝΠϯϞσϧ υϝΠϯΤΩεύʔτͷࣝΛϞσϧԽ ྑ͍ϞσϧͱυϝΠϯʹಛԽͨ͠Ϟσϧ υϝΠϯΤΩεύʔτͱ։ൃऀͷཧղͷΑΓͲ͜Ζ ࣮ΛυϝΠϯϞσϧʹدͤΔ
Ϟσϧͷද͠ํ ΤϯςΟςΟ ΦϒδΣΫτ αʔϏε ूͱϑΝΫτϦ ϦϙδτϦ
ΤϯςΟςΟ ࿈ଓੑͱಉҰੑΛ࣋ͭ ಉҰੑ͕ॏཁࢹ͞ΕΔ ϥΠϑαΠΫϧΛ࣋ͭ ಉҰੑଐੑͰදͤΔ߹ͱidͰදͤΔ߹͕͋Δ ಉҰੑʹؔΘΔଐੑʹ͔ؔ͠৺͕ͳ͍
ΦϒδΣΫτ ଐੑ͕ॏཁࢹ͞ΕΔΦϒδΣΫτ ଐੑશ͕ͯҰக͢Εಉ͡ΦϒδΣΫτ
αʔϏε ΤϯςΟςΟʹΦϒδΣΫτʹϚον͠ͳ͍ ৼΔ͍ DDDతʹΤϯςΟςΟͱΦϒδΣΫτ͔ΒৼΔ ͍Λ͠ͳ͍
ूɺϑΝΫτϦ ΤϯςΟςΟɺΦϒδΣΫτෳͷΦϒδΣΫ τͰͻͱ·ͱ·Γʹཧղ͞ΕΔ͜ͱ͕͋Δ ֓೦ͷΈ߹ΘͤΛूͱݺͿ ͜ΕΒͷੜΛ·ͱΊͯϋϯυϦϯά͢Δͷ͕ϑΝ ΫτϦ
ϦϙδτϦ ӬଓԽ(ΠϯϑϥετϥΫνϟ)ͷΞΫηεΛΧ ϓηϧԽ͢Δ υϝΠϯʹΠϯϑϥετϥΫνϟ(۩ମతʹSQL ͳͲ)͕ݱΕͳ͍Α͏ʹ͢Δ υϝΠϯʹରͯ͠ෆࣗવʹͳΒͳ͍ݴ༿Ͱද͢
ςΩετ Ϟσϧ୳ࡧͷ͏ͣ·͖ ࣝͷநԽɺߏԽҰͰ͑ΔϞσϧʹ ͨͲΓண͚ͳ͍ɻ
ϞσϧͲ͏ॻ͘ʁ ϞσϧʹϦϑΝΫλϦϯά͕ඞཁ దٓॻ͖͑ΔͷͰखॻָ͖͕ حྷʹݟͤΔΑΓѻ͍͕͢͞େࣄ ݻ·͖ͬͯͨΒదٓਗ਼ॻ
·ͱΊ
DDDͰѻͬͯΔ͜ͱ ਖ਼͍͠։ൃͰʮԿʹʯूத͖͔͢ʁ ڞ௨ͷؔ৺͝ͱΛͲ͏ͬͯΓग़͔͢ʁ ؔ৺ͱͳΔࣝͷߏΛͲ͏ͬͯදͤྑ͍͔ʁ Ϟσϧͷ࣭ͷอͪํ
DDDͰղܾͰ͖ͳ͍͜ͱ Զͷઃܭਖ਼͍͠ʁ ͜ΕΛಡΊ˓˓γεςϜઃܭͰ͖Δʁ ͜͏ɺͯΊΕਖ਼͍͠ઃܭʹͳΔͱ͔ɾɾɾ