Video: Dab tsi yog cov ntaub ntawv phau ntawv txhais lus hauv kev txheeb xyuas kev lag luam?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov ntaub ntawv Dictionaries yog RML cov ntaub ntawv qauv uas ntes cov ntsiab lus nyob rau theem teb txog cov cov ntaub ntawv nyob rau hauv ib tug system los yog systems. Thaum lub sij hawm yuav tsum tau, lub tsom xam tsis yog ntawm qhov tseeb cov ntaub ntawv nyob rau hauv lub database los yog technical design yuav tsum tau siv lub cov ntaub ntawv lag luam cov khoom nyob rau hauv lub database.
Cov lus nug tseem yog, dab tsi yog phau ntawv txhais lus cov ntaub ntawv thiab nws lub hom phiaj yog dab tsi?
A cov ntaub ntawv phau ntawv txhais lus yog ib phau ntawm kev piav qhia ntawm lub cov ntaub ntawv cov khoom lossis cov khoom hauv a cov ntaub ntawv qauv rau cov txiaj ntsig ntawm cov programmers thiab lwm tus uas yuav tsum tau xa mus rau lawv. Thawj kauj ruam hauv kev txheeb xyuas cov khoom siv uas cov neeg siv sib cuam tshuam yog txhawm rau txheeb xyuas txhua yam khoom thiab nws kev sib raug zoo rau lwm yam khoom.
Ib yam li ntawd, dab tsi yuav tsum suav nrog hauv phau ntawv txhais lus cov ntaub ntawv? A Cov ntaub ntawv phau ntawv txhais lus yog ib qho kev piav qhia ntawm cov ntaub ntawv nyob rau hauv cov nqe lus lag luam, kuj suav nrog cov ntaub ntawv hais txog cov cov ntaub ntawv xws li cov ntaub ntawv hom, cov ntsiab lus ntawm cov qauv, thiab kev txwv kev ruaj ntseg. Tsis zoo li Kev Lag Luam Glossaries, uas tsom rau cov ntaub ntawv thoob plaws lub koom haum, Cov ntaub ntawv Dictionaries kev txhawb nqa Cov ntaub ntawv Warehouses los ntawm txhais tau tias yuav siv lawv li cas.
Qhov thib ob, qhov piv txwv ntawm phau ntawv txhais lus yog dab tsi?
19.11 Cov ntaub ntawv phau ntawv txhais lus A cov ntaub ntawv phau ntawv txhais lus yog qhov chaw khaws cia hauv nruab nrab ntawm metadata. Metadata yog cov ntaub ntawv txog cov ntaub ntawv . Ib txhia piv txwv ntawm yam uas yuav muaj nyob rau hauv ib lub koom haum cov ntaub ntawv phau ntawv txhais lus suav nrog: Cov cov ntaub ntawv hom, e.g., integer, tiag, tus cwj pwm, thiab cov duab ntawm txhua qhov chaw hauv lub koom haum cov ntaub ntawv.
Dab tsi yog phau ntawv txhais lus cov ntaub ntawv hauv database?
A cov ntaub ntawv phau ntawv txhais lus yog ib cov ntaub ntawv los yog ib pawg ntawm cov ntaub ntawv uas muaj a database cov metadata. Cov cov ntaub ntawv phau ntawv txhais lus muaj cov ntaub ntawv hais txog lwm yam khoom hauv lub database , zoo li cov ntaub ntawv kev ua tswv cuab, cov ntaub ntawv kev sib raug zoo rau lwm yam khoom, thiab lwm yam cov ntaub ntawv . Cov cov ntaub ntawv phau ntawv txhais lus yog ib qho tseem ceeb ntawm kev sib raug zoo database.
Pom zoo:
Cov lag luam feem ntau txhim kho dab tsi tuaj yeem khaws thiab txheeb xyuas cov ntaub ntawv rau lub hom phiaj ntawm kev txiav txim siab ua lag luam?
Cov lag luam feem ntau txhim kho dab tsi tuaj yeem khaws thiab txheeb xyuas cov ntaub ntawv rau lub hom phiaj ntawm kev txiav txim siab ua lag luam? kev khiav hauj lwm qhov system. Ib lub hom phiaj ntawm kev tswj cov ntaub ntawv yog muab cov lag luam nrog cov ntaub ntawv zoo uas lawv xav tau: ua kom tiav ib txoj haujlwm
Dab tsi yog cov ntaub ntawv phau ntawv txhais lus hauv kev txheeb xyuas thiab tsim qauv?
Cov ntaub ntawv phau ntawv txhais lus. Los ntawm Systems Analysis and Design: A Structured Approach: A data Dictionary is a collection of data about data. Nws tuav cov ntaub ntawv hais txog kev txhais, qauv, thiab kev siv ntawm txhua cov ntaub ntawv uas lub koom haum siv. Muaj ntau tus cwj pwm uas yuav khaws cia txog cov ntaub ntawv keeb
Dab tsi yog cov txiaj ntsig tseem ceeb ntawm kev siv phau ntawv txhais lus cov ntaub ntawv?
Ib phau ntawv txhais lus tsim tau tuaj yeem muab cov koom haum thiab cov lag luam muaj txiaj ntsig ntau, suav nrog: Txhim kho cov ntaub ntawv zoo. Txhim kho kev ntseeg siab ntawm cov ntaub ntawv ncaj ncees. Txhim kho cov ntaub ntawv thiab kev tswj xyuas. Txo cov ntaub ntawv redundancy. Rov qab siv cov ntaub ntawv. Kev sib raug zoo ntawm kev siv cov ntaub ntawv. Kev txheeb xyuas cov ntaub ntawv yooj yim dua. Txhim kho kev txiav txim siab raws li cov ntaub ntawv zoo dua
Cov tuam txhab siv cov ntaub ntawv txheeb xyuas li cas hauv lawv txoj kev lag luam?
Cov ntaub ntawv loj analytics suav nrog kev tshuaj xyuas cov ntaub ntawv loj. Qhov no yog ua kom nthuav tawm cov qauv zais, kev sib raug zoo thiab tseem muab kev pom zoo kom txiav txim siab ua lag luam kom raug. Qhov tseem ceeb, kev lag luam xav kom muaj lub hom phiaj thiab cov ntaub ntawv-tsav, thiab yog li lawv tau txais lub zog ntawm cov ntaub ntawv thiab thev naus laus zis
Kev txheeb xyuas kev lag luam kev lag luam yog dab tsi?
Kev txheeb xyuas kev lag luam yog ib lo lus tau tsim nyob rau xyoo 1960 los ntawm Dr Eric Berne, tus kws kho mob hlwb uas ntseeg tias lub xeev ego yuav raug liam rau kev sib txuas lus tsis sib haum xeeb. Nws txoj kev xav, uas muaj hnub nyoog 59 xyoos, qhia tias peb hnov qhov kev tawm tsam, kev tswj hwm thiab kev tswj hwm los ntawm ib qho ntawm peb lub xeev ego