Cov txheej txheem:

Dab tsi yog cov txiaj ntsig ntawm phau ntawv txhais lus cov ntaub ntawv?
Dab tsi yog cov txiaj ntsig ntawm phau ntawv txhais lus cov ntaub ntawv?

Video: Dab tsi yog cov txiaj ntsig ntawm phau ntawv txhais lus cov ntaub ntawv?

Video: Dab tsi yog cov txiaj ntsig ntawm phau ntawv txhais lus cov ntaub ntawv?
Video: Saib Mis paub Poj niam (hluas nkauj) tus yam ntxwv lub siab 2024, Kaum ib hlis
Anonim

Ib phau ntawv txhais lus tau tsim muaj tuaj yeem muab cov koom haum thiab kev lag luam ntau cov txiaj ntsig, suav nrog:

  • Txhim kho cov ntaub ntawv zoo.
  • Txhim kho kev ntseeg siab hauv cov ntaub ntawv kev ncaj ncees.
  • Txhim kho cov ntaub ntawv thiab kev tswj xyuas.
  • Txo cov ntaub ntawv redundancy.
  • Rov siv dua cov ntaub ntawv .
  • Kev sib raug zoo hauv cov ntaub ntawv siv.
  • Yooj yim dua cov ntaub ntawv tsom xam.
  • Txhim kho kev txiav txim siab raws li qhov zoo dua cov ntaub ntawv .

Ib yam li ntawd ib tug yuav nug, dab tsi yog qhov tseem ceeb ntawm phau ntawv txhais lus cov ntaub ntawv?

Muaj nuj nqi ntawm Cov ntaub ntawv phau ntawv txhais lus . Nws txhais cov cov ntaub ntawv cov khoom ntawm txhua tus neeg siv hauv cov ntaub ntawv. Los ntawm txoj kev no, nws pab ntau tus neeg siv kom paub txhua yam khoom uas muaj nyob hauv database thiab leej twg tuaj yeem nkag mus rau nws. Ib tug tsis nco qab tag nrho cov ntxhuav, views txwv thiab lwm yam nyob rau hauv ib tug loj database.

Tsis tas li ntawd, cov ntaub ntawv phau ntawv txhais lus hauv qhov project documentation yog dab tsi? Tsim kom yooj yim cov ntaub ntawv ntawm koj cov databases hauv feeb thiab qhia rau koj pab neeg. Datadictionary yog ib qho khoom muag ntawm cov ntaub ntawv cov ntsiab lus hauv adatabase los yog cov ntaub ntawv qauv nrog cov lus piav qhia ntxaws txog nws hom, kev sib raug zoo, lub ntsiab lus, qhov chaw thiab kev siv.

Ib tug kuj yuav nug, dab tsi yog cov khoom ntawm cov ntaub ntawv phau ntawv txhais lus?

s:

  • ? Domains, uas yog cov ntsiab lus dav dav, lossis cov qauv, forfields uas qhia txog cov yam ntxwv sib xws.
  • ? Cov ntaub ntawv, uas yog cov ntaub ntawv khaws cia cov qauv uas suav nrog kev sau cov ntaub ntawv ntsig txog.

Dab tsi yog qhov sib txawv ntawm cov ntaub ntawv phau ntawv txhais lus thiab metadata?

Cov ntaub ntawv phau ntawv txhais lus yog lub chaw khaws cia khaws txhua cov ntaub ntawv. Meta cov ntaub ntawv yog cov ntaub ntawv uas txhais lwm yam cov ntaub ntawv . Li no, lub cov ntaub ntawv phau ntawv txhais lus tuaj yeem yog metadata uas piav txog qee cov ntaub ntawv hais txog lub database.

Pom zoo: