PL SQL cov ntaub ntawv yog dab tsi?
PL SQL cov ntaub ntawv yog dab tsi?

Video: PL SQL cov ntaub ntawv yog dab tsi?

Video: PL SQL cov ntaub ntawv yog dab tsi?
Video: Data Science with Python! Analyzing File Types from Avro to Stata 2024, Kaum ib hlis
Anonim

PL / SQL Cov Ntaub Ntawv . A sau tseg yog ib pawg ntawm cov ntaub ntawv ntsig txog cov khoom khaws cia hauv thaj chaw, txhua tus muaj nws tus kheej lub npe thiab hom ntaub ntawv. Cov ntaub ntawv yog tsim los ntawm ib pawg ntawm cov teb, zoo ib yam li cov kab hauv a kab . Cov% ROWTYPE attribute cia koj tshaj tawm a PL / SQL cov ntaub ntawv uas sawv cev a kab nyob rau hauv ib lub rooj database, tsis sau tag nrho cov kab.

Ib yam li ntawd, kev siv cov ntaub ntawv hauv PL SQL yog dab tsi?

PL / SQL cov ntaub ntawv pab koj ua kom yooj yim rau koj cov cai los ntawm kev hloov ntawm qib teb mus rau sau tseg - theem kev ua haujlwm. PL / SQL ntawv muaj peb hom cov ntaub ntawv : table-based, cursor-based, programmer-defined. Ua ntej siv a sau tseg , koj yuav tsum tshaj tawm nws.

Qhov thib ob, % hom hauv PL SQL yog dab tsi? PL / SQL ntawv % HOM Yam ntxwv. Cov% HOM attribute tso cai rau koj tshaj tawm qhov tsis tu ncua, sib txawv, los yog parameter los ntawm tib cov ntaub ntawv hom raws li yav tas los tshaj tawm kuj sib txawv, cov ntaub ntawv, nested table, los yog database kem.

Kuj kom paub, yog Cov Ntaub Ntawv hauv Oracle PL SQL?

A PL / SQL cov ntaub ntawv yog ib qho kev sib xyaw cov ntaub ntawv qauv uas yog ib pab pawg neeg muaj feem xyuam cov ntaub ntawv khaws cia hauv teb. Txhua qhov chaw nyob hauv PL / SQL cov ntaub ntawv muaj nws lub npe thiab cov ntaub ntawv hom.

Dab tsi yog hom ntaub ntawv hauv Oracle nrog piv txwv?

A Hom ntaub ntawv yog cov ntaub ntawv complex hom uas tso cai rau tus programmer tsim cov ntaub ntawv tshiab hom nrog cov qauv kab uas xav tau. Hom ntaub ntawv tsuas yog txhais tau tias cov ntaub ntawv tshiab hom . Ib zaug lub hom ntaub ntawv yog tsim, nws yuav muab khaws cia raws li cov ntaub ntawv tshiab hom hauv database thiab tib yam yuav tsum tau siv los tshaj tawm qhov sib txawv hauv cov kev pab cuam.

Pom zoo: