Video: Kuv yuav nrhiav MySQL schema li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Siv cov Schema Inspector mus xauj cov ntaub ntawv dav dav los ntawm schema cov khoom (pom hauv daim duab hauv qab no). Nws tso cai rau koj los ua cov haujlwm saib xyuas ntawm cov ntxhuav xws li ANALYZE, OPTIMIZE, KOOB , thiab CHECKSUM TABLE. Txhawm rau nkag mus rau tus kws tshuaj ntsuam xyuas, nyem nyem a schema thiab xaiv tus Schema Tus neeg soj ntsuam.
Ua li no, dab tsi yog qhov schema hauv MySQL?
Schema yog ib qho kev sau ntawm cov ntxhuav nrog kab thiab kab thiab cov lus nug cais tuaj yeem sau rau schemas zoo li databases. Tiag tiag, schema txhais tau tias ib tug template nyob rau hauv MySQL . lawv txhais qhov loj, hom, ib pawg ntawm cov ntaub ntawv. Cov schemas muaj cov khoom siv database xws li views, rooj, thiab cov cai.
Tom qab ntawd, lo lus nug yog, koj yuav nrhiav tau tus qauv ntawm lub rooj li cas? Nov yog daim ntawv teev npe tsis tiav:
- sql 3:. schema table_name.
- Postgres (psql): d table_name.
- SQL neeg rau zaub mov: sp_help table_name (los yog sp_columns table_name rau cov kab xwb)
- Oracle DB2: desc table_name lossis piav qhia table_name.
- MySQL: piav qhia table_name (lossis qhia txhua kab los ntawm table_name rau txhua kab)
Xav txog qhov no, dab tsi yog qhov schema ntawm database?
Database schema . Lub sij hawm " schema " yog hais txog lub koom haum ntawm cov ntaub ntawv raws li ib tug blueprint ntawm yuav ua li cas lub database yog tsim (sib faib ua database rooj nyob rau hauv rooj plaub ntawm kev sib raug zoo databases ). Lub ntsiab txhais ntawm a database schema yog ib txheej ntawm cov qauv (cov kab lus) hu ua integrity constraints imposed on a database.
Kuv tuaj yeem pom txhua lub rooj hauv MySQL li cas?
Kom tau ib lis ntawm rooj hauv a MySQL database, siv lub mysql tus neeg siv cuab yeej txuas rau MySQL server thiab khiav lub Qhia TABLE lus txib. Qhov kev xaiv FULL modifier yuav ua yeeb yam tus rooj ntaus ntawv raws li kab ntawv tso tawm thib ob.
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