Video: Dab tsi yog datatype rau lub sijhawm hauv Oracle?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Date/Time Datatypes
Cov ntaub ntawv hom Syntax | Oracle 9 i |
---|---|
daim ntawv teev sijhawm (fractional vib nas this precision) nrog rau lub sijhawm | fractional vib nas this precision yuav tsum yog tus lej ntawm 0 thiab 9. (default yog 6) |
daim ntawv teev sijhawm (fractional vib nas this precision) nrog lub sijhawm hauv cheeb tsam | fractional vib nas this precision yuav tsum yog tus lej ntawm 0 thiab 9. (default yog 6) |
Hais txog qhov no, dab tsi yog datatype rau lub sijhawm?
Hnub tim thiab Sijhawm cov ntaub ntawv hom
Hom ntaub ntawv | Hom ntawv | Qhov tseeb |
---|---|---|
sij hawm | hh:mm:ss[.nnnnnn] | 100 nanoseconds |
hnub | YYYY-MM-DD | 1 hnub |
lub sijhawm me me | YYYY-MM-DD hh:mm:ss | 1 feeb |
hnub tim | YYYY-MM-DD hh:mm:ss[.nn] | 0.00333s ob |
Ib sab saum toj no, hom ntaub ntawv twg yog siv los khaws ob hnub thiab sijhawm rau kab hauv Oracle? TIMESTAMP
Kuj paub, hom hnub Oracle puas suav nrog lub sijhawm?
Hnub tim hom hauv oracle ua tsis yog suav nrog lub sijhawm tus nqi.
Lub sijhawm database hauv Oracle yog dab tsi?
Sijhawm tsam yog teem caij thaum database tsim los yog siv CREATE DATABASE . Nws tuaj yeem hloov kho siv ALTER DATABASE lus txib. Database sij hawm tsis tuaj yeem hloov pauv yog tias ib kab ntawm hom TIMESTAMP Nrog [LOCAL] TIMEZONE muaj nyob rau hauv database . Sijhawm tsam tuaj yeem teeb tsa hauv Qhov Chaw cheeb tsam format or [+|-]HH:MM format.
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