Video: Dab tsi yog me ntsis hauv MySQL?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Me ntsis Hom nqi
Cov BIT hom ntaub ntawv yog siv los khaws cia me ntsis - cov nqi teb. Ib hom BIT (N) enables cia N- me ntsis tus nqi. N tuaj yeem nyob ntawm 1 txog 64. Kom qhia meej me ntsis tus nqi, b'value' sau tau siv tau. tus nqi yog tus nqi binary sau siv zeros thiab ib qho.
Kuj paub, dab tsi yog hom me ntsis hauv MySQL?
Cov BIT cov ntaub ntawv hom yog siv los khaws cia me ntsis tus nqi. A hom ntawm BIT (M) enables cia ntawm M - me ntsis tus nqi. M tuaj yeem nyob ntawm 1 txog 64. Kom qhia meej me ntsis tus nqi, b' nqi' sau tau siv tau. Yog tias koj muab tus nqi rau a BIT (M) kab uas tsawg dua M me ntsis ntev, tus nqi yog padded rau sab laug nrog zeros.
Ib sab saum toj, dab tsi yog hom me ntsis? Me ntsis cov ntaub ntawv hom yog siv los khaws cov ntaub ntawv boolean. Sql server tsim los khaws cov boolean li me ntsis nyob rau hauv sql neeg rau zaub mov rooj, uas tuaj yeem lees txais tus nqi suav. Nws yuav muaj ib leeg me ntsis thiab tus neeg siv tuaj yeem khaws 1 lossis 0.
Hauv qhov no, dab tsi yog me ntsis 1 hauv MySQL?
TINYINT yog 8- me ntsis integer tus nqi, a BIT teb tuaj yeem khaws cia nruab nrab 1bit ib , BIT ( 1 ), thiab 64 me ntsis , BIT (64). Rau cov nqi boolean, BIT ( 1 ) zoo nkauj heev. me ntsis -thiab-tus kheej-hauv- mysql /290253#290253. Qhia ib qhov txuas rau cov lus teb no. Copy link.
MySQL cov ntaub ntawv hom yog dab tsi?
MySQL txhawb SQL hom ntaub ntawv nyob rau hauv ob peb pawg: numeric hom , hnub thiab sijhawm hom , hlua (tus cim thiab byte) hom , spatial hom , thiab JSON hom ntaub ntawv.
Pom zoo:
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