Cov txheej txheem:
Video: Peb tuaj yeem kho lub rooj mysql li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Rau kho MySQL database, ua ntej qhib lub cuab yeej phpMyAdmin, tom qab ntawd lub Databases tab thiab nyem rau ntawm lub npe ntawm cov ntaub ntawv xav tau. Xaiv tus rooj uas xav tau kho los ntawm ticking lub checkboxes ntawm sab laug ntawm lub rooj npe. Tom qab ntawd los ntawm Cov Xaiv Xaiv: poob cov ntawv qhia zaub mov xaiv Kho Rooj.
Kuj nug, dab tsi kho lub rooj ua MySQL?
Yog tias koj siv qhov kev xaiv QUICK, Kho rooj sim ua kho tsuas yog cov ntaub ntawv index, thiab tsis yog cov ntaub ntawv. Yog tias koj siv EXTENDED kev xaiv, MySQL tsim cov index kab los ntawm kab es tsis txhob tsim ib qhov Performance index ntawm ib lub sij hawm nrog sorting. Hom no kho yog zoo li uas ua los ntawm myisamchk --safe-rov qab.
Tsis tas li ntawd, kuv yuav kho InnoDB li cas? Rov qab los ntawm corrupted InnoDB rooj
- Kauj ruam 1 - Nqa koj cov ntaub ntawv hauv hom rov qab.
- Kauj Ruam 2 - Tshawb xyuas cov ntxhuav twg puas raug thiab ua ib daim ntawv teev npe.
- Kauj ruam 3 - Thaub qab thiab tso koj cov rooj corrupted.
- Kauj Ruam 4 - Rov pib MySQL hauv hom qub.
- Kauj ruam 5 – Ntshuam thaub qab.sql.
- Kauj Ruam 6 - Hloov chaw nres nkoj thiab tuav lub npias.
Kuv yuav kho lub rooj sib tsoo hauv MySQL li cas?
Kho cov rooj sib tsoo nrog phpMyAdmin
- Nkag mus rau hauv koj tus account SiteWorx.
- Ntawm sab laug, xaiv Hosting Nta> MySQL> PhpMyAdmin.
- Xaiv qhov tseeb database los ntawm cov npe ntawm sab laug.
- Xaiv lub checkbox sib raug rau lub rooj corrupted, thiab los ntawm cov npe xaiv, nyem Kho lub rooj.
Kuv yuav ua li cas thiaj paub yog tias lub rooj MySQL puas raug?
Koj tuaj yeem pom cov ntaub ntawv no hauv lub cav yuam kev lossis hauv information_schema. mysql > xaiv table_name, cav los ntawm information_schema. rooj qhov twg table_name = '< TABSIS >' and table_schema = ''; Cov cuab yeej tseem ceeb / lus txib kom kuaj xyuas cov teeb meem nrog cov ntaub ntawv kev noj nyiaj txiag yog KUJ TAB , Kho TABSIS , thiab myisamchk.
Pom zoo:
Kuv yuav luam ib lub rooj los ntawm ib lub rooj mus rau lwm qhov hauv MySQL li cas?
MySQL muab qhov kev xaiv muaj zog rau kev luam cov ntaub ntawv los ntawm ib lub rooj mus rau lwm lub rooj (lossis ntau lub rooj). Cov lus txib yooj yim hu ua INSERT SELECT. Ib daim ntawv qhia tag nrho ntawm cov syntax yog qhia hauv qab no: INSERT [IGNORE] [INTO] table_name. [(column_name,)] Xaiv los ntawm table_name qhov twg
Kuv yuav ua li cas thiaj li tau txais kuv lub rooj pivot lub rooj tsim rov qab?
Xaiv ib lub xovtooj ntawm tes hauv lub rooj pivot, nyem nyem rau ntawm koj tus nas, thiab xaiv 'Show Field List'. Qhov no yuav coj rov qab lub rooj pivot
Muaj pes tsawg lub rooj peb tuaj yeem koom nrog hauv SQL Server?
Hauv SQL Server, koj tuaj yeem koom nrog ntau dua ob lub rooj ntawm ob txoj hauv kev: los ntawm kev siv nested JOIN, lossis los ntawm kev siv WHERE clause. Joins yeej ib txwm ua khub-wise
Kuv tuaj yeem nrhiav tus yuam sij txawv teb chaws ntawm lub rooj hauv MySQL li cas?
Txhawm rau pom kev sib raug zoo txawv teb chaws ntawm lub rooj: SELECT TABLE_NAME, COLUMN_NAME, CONSTRAINT_NAME, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME NTAWM INFORMATION_SCHEMA. KEY_COLUMN_USAGE WHERE REFERENCED_TABLE_SCHEMA = 'db_name' THIAB REFERENCED_TABLE_NAME = 'table_name';
Peb puas tuaj yeem ntxiv ob tus yuam sij txawv teb chaws hauv ib lub rooj?
Yog lawm, MySQL tso cai rau qhov no. Koj tuaj yeem muaj ntau tus yuam sij txawv teb chaws ntawm tib lub rooj. Cov yuam sij txawv teb chaws hauv koj lub tswv yim (ntawm Account_Name thiab Account_Type) tsis tas yuav muaj kev kho tshwj xeeb lossis syntax. Nws zoo nkaus li tias tsawg kawg yog ib qho ntawm cov xwm txheej no siv rau cov kab ID thiab Lub Npe hauv Cov Neeg Siv Khoom