![Nyob rau hauv cov ntaub ntawv hierarchical qauv raug teeb tsa li? Nyob rau hauv cov ntaub ntawv hierarchical qauv raug teeb tsa li?](https://i.tvmoviesgames.com/preview/questions/17890035-in-hierarchical-model-records-are-organised-as-j.webp)
2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ib tus qauv hierarchical database yog cov qauv ntaub ntawv uas cov ntaub ntawv tau teeb tsa rau ib tsob ntoo zoo li qauv. Cov ntaub ntawv raug muab khaws cia ua cov ntaub ntawv uas txuas rau ib leeg los ntawm kev sib txuas. Cov ntaub ntawv yog ib phau ntawm cov teb, nrog rau txhua daim teb tsuas muaj ib qho nqi xwb.
Koj ua li cas siv tus qauv cov ntaub ntawv hierarchical?
Ib tus qauv hierarchical sawv cev rau cov ntaub ntawv hauv cov qauv ntoo zoo li uas muaj tus niam txiv ib leeg rau txhua cov ntaub ntawv. Yuav kom tswj tau qhov kev txiav txim muaj ib thaj chaw uas ua rau cov kwv tij nyob rau hauv ib qho kev kaw cia.
Cov ntaub ntawv hierarchy yog dab tsi?
Cov ntaub ntawv hierarchical yogcov qauv ntaub ntawv thaum cov khoom sib txuas rau ib leeg hauv kev sib raug zoo ntawm niam txiv-tus menyuam hauv cov qauv ntoo tag nrho. Xav txog cov ntaub ntawv zoo li tsev neeg tsob ntoo, nrog niam tais yawm txiv, niam txiv, menyuam, thiab xeeb leej xeeb ntxwv ua ib qho kev sib txuas ntawm cov ntaub ntawv.
Tus qauv hierarchical database ua haujlwm li cas?
A hierarchical database is a data model nyob rau hauv uas cov ntaub ntawv yog khaws cia nyob rau hauv daim ntawv ntawm cov ntaub ntawv thiab teem rau hauv ib tsob ntoo zoo li qauv, los yog niam txiv-me nyuam qauv, nyob rau hauv uas ib tug niam txiv node muaj peev xwm muaj ntau tus me nyuam nodes txuas los ntawm kev sib txuas.
Koj sawv cev li cas cov ntaub ntawv hauv hierarchical?
Hierarchical cov ntaub ntawv muaj nyob rau hauv tree graphs; thiaj li hu ua vim hais tias ntawm lawv zoo sib xws rau ib tsob ntoo tus qauv (txawm hais tias ib tsob ntoo uas tau tig upside downtias cov cag nyob saum toj thiab cov ceg hauv qab nws).
Pom zoo:
Cov ntaub ntawv qhia ntawv puas txhawb nqa cov ntaub ntawv kawm?
![Cov ntaub ntawv qhia ntawv puas txhawb nqa cov ntaub ntawv kawm? Cov ntaub ntawv qhia ntawv puas txhawb nqa cov ntaub ntawv kawm?](https://i.tvmoviesgames.com/preview/questions/17850469-does-instructional-materials-support-the-curriculum-j.webp)
Cov ntaub ntawv qhia yuav tsum txhawb nqa txoj kev kawm lub tswv yim, cov hom phiaj thiab cov hom phiaj ntawm Cheeb Tsamthiab cov hom phiaj ntawm cov ntaub ntawv kawm uas cov ntaub ntawv yuav raug siv. … Cov ntaub ntawv qhia yuav tsum ua tau raws li cov qauv zoo ntawm cov ntsiab lus tseeb thiab kev nthuav qhia.
Cov ntawv xov xwm pom nyob rau hauv cov ntawv xov xwm nyob qhov twg?
![Cov ntawv xov xwm pom nyob rau hauv cov ntawv xov xwm nyob qhov twg? Cov ntawv xov xwm pom nyob rau hauv cov ntawv xov xwm nyob qhov twg?](https://i.tvmoviesgames.com/preview/questions/17854387-where-are-editorials-found-in-newspapers-j.webp)
Editorials feem ntau yog luam tawm ntawm nplooj ntawv nplooj siab, hu ua nplooj ntawv kho, uas feem ntau sau cov ntawv rau tus editor los ntawm cov tswv cuab ntawm pej xeem; nplooj ntawv tawm tsam nplooj ntawv no yog hu ua nplooj ntawv op-ed thiab nquag muaj cov lus xav (li no lub npe xav daim) los ntawm cov kws sau ntawv tsis ncaj qha koom nrog … Lub hom phiaj ntawm kev sau ntawv hauv xov xwm yog dab tsi?
Thaum cov ntaub ntawv tshiab cuam tshuam nrog kev muab cov ntaub ntawv qub no hu ua?
![Thaum cov ntaub ntawv tshiab cuam tshuam nrog kev muab cov ntaub ntawv qub no hu ua? Thaum cov ntaub ntawv tshiab cuam tshuam nrog kev muab cov ntaub ntawv qub no hu ua?](https://i.tvmoviesgames.com/preview/questions/17892266-when-newer-information-interferes-with-the-retrieval-of-older-information-this-is-called-j.webp)
Nrog retroactive cuam tshuam, cov ntaub ntawv tshiab cuam tshuam lub peev xwm rov qab cov ntaub ntawv qub. Nrog kev cuam tshuam tsis zoo, nws yog qhov rov qab: cov ntaub ntawv qub cuam tshuam qhov rov qab los ntawm cov ntaub ntawv tshiab tau kawm.
Puas yog cov ntaub ntawv sib tw cov ntaub ntawv raug cai?
![Puas yog cov ntaub ntawv sib tw cov ntaub ntawv raug cai? Puas yog cov ntaub ntawv sib tw cov ntaub ntawv raug cai?](https://i.tvmoviesgames.com/preview/questions/17899922-are-bidding-documents-legal-documents-j.webp)
Kev tsim "Cov ntaub ntawv cog lus" yog cov ntaub ntawv sau uas txhais lub luag haujlwm, kev lav phib xaub, thiab "Ua haujlwm" raws li Daim Ntawv Cog Lus Tsim Kho, thiab raug cai lij choj rau ob tog (Tswj thiab tus neeg cog lus).
Cov ntaub ntawv twg muaj cov ntaub ntawv bituminous?
![Cov ntaub ntawv twg muaj cov ntaub ntawv bituminous? Cov ntaub ntawv twg muaj cov ntaub ntawv bituminous?](https://i.tvmoviesgames.com/preview/questions/17934463-in-which-forms-the-bituminous-materials-are-available-j.webp)
Nws muaj ob chav kawm ntawm cov khoom siv bituminous: (1) asph alt; thiab (2) tar. Cov ntaub ntawv no feem ntau yog siv los ua dej-pov thawj sealants, thiab ua cov ntaub ntawv los tuav cov aggregate ua ke nyob rau hauv bituminous pavements. Dab tsi yog cov khoom siv bituminous?