Cov txheej txheem:
- Tshwj xeeb, kuv yuav piav qhia txog kev sau npe rau cov khoom siv database, vim li cas lawv tseem ceeb heev, thiab koj yuav tsum ua dab tsi thiab tsis ua
- Ntsis Query kom tau tag nrho cov npe kab los ntawm cov lus database hauv SQL
Video: Koj npe lub rooj hauv SQL li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Ua ntej, right-click rau ntawm npe table thiab xaiv Rename cov ntawv qhia zaub mov: Thib ob, ntaus tus tshiab npe ntawm rooj Piv txwv li, product_archive thiab nias Enter: Hauv no nyeem, koj tau kawm yuav ua li cas hloov npe a rooj nyob rau hauv ib tug database siv sp_rename khaws cov txheej txheem thiab SQL ntawv Server Management Studio.
Ntawm no, ua li cas koj npe lub rooj hauv database?
Tshwj xeeb, kuv yuav piav qhia txog kev sau npe rau cov khoom siv database, vim li cas lawv tseem ceeb heev, thiab koj yuav tsum ua dab tsi thiab tsis ua
- Ceeb toom!
- Zam cov lus qhia.
- Tus lej qis.
- Hom ntaub ntawv tsis yog npe.
- Underscores cais cov lus.
- Tag nrho cov lus, tsis yog abbreviations.
- Siv cov ntawv luv luv.
- Zam cov lus tshwj tseg.
Ib tug kuj yuav nug, dab tsi yog lub naming convention siv rau SQL? Tsis muaj cov cim tshwj xeeb, cov qhab nia lossis qhov chaw yuav tsum yog siv . Indexs yuav nyob twj ywm npe raws li tus SQL ntawv Server default, tshwj tsis yog tias qhov ntsuas tau tsim yog rau lub hom phiaj tshwj xeeb. Txhua qhov chaw tseem ceeb thiab cov chaw tseem ceeb txawv teb chaws yuav raug ntsuas thiab muaj npe nyob rau hauv SQL ntawv Server default.
Ib sab saum toj no, kuv yuav nrhiav tau lub npe lub rooj hauv SQL li cas?
- MySQL hom syntax.
- SELECT table_name NTAWM information_schema.tables WHERE table_type = 'base table' THIAB table_schema = 'test';
- SQL Server.
- SIV xeem; // Xaiv DATABASE. SELECT table_name NTAWM information_schema.tables WHERE table_type = 'base table'
- Oracle.
- DB 2.
- PostgreSQL.
Kuv yuav sau cov npe kab hauv ib lub rooj hauv SQL li cas?
Ntsis Query kom tau tag nrho cov npe kab los ntawm cov lus database hauv SQL
- SELECT COLUMN_NAME.
- Los ntawm INFORMATION_SCHEMA. COLUMNS.
- WHERE TABLE_NAME = 'Koj Lub Npe'
- YUAV TSUM ORDINAL_POSITION.
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
Vim li cas koj thiaj yuav tsum yuav lub npe sau npe?
Muaj koj tus kheej lub npe sau npe, lub vev xaib thiab email chaw nyob yuav ua rau koj thiab koj lub lag luam saib zoo dua. Lwm qhov laj thawj rau kev lag luam los sau npe lub npe adomain yog los tiv thaiv kev cai lij choj thiab cov cim lag luam, tsim kom muaj kev ntseeg siab, ua kom muaj kev paub txog kev lag luam, thiab kev tshawb nrhiav cav
Kuv yuav hloov npe lub rooj li cas hauv kev nkag?
Rename ib lub rooj Nyob rau hauv Navigation Pane, right-click lub rooj uas koj xav kom rename, thiab ces nias Rename ntawm lub shortcut ntawv qhia zaub mov. Nco tseg: Koj yuav tsum kaw tag nrho cov khoom qhib uas siv lub rooj ua ntej koj tuaj yeem hloov npe nws. Ntaus lub npe tshiab thiab nias ENTER. Txhawm rau txuag koj cov kev hloov pauv, nyem Txuag rau ntawm Quick Access Toolbar
Qhov txawv ntawm lub rooj computer thiab lub rooj sau ntawv yog dab tsi?
Cov rooj sau ntawv txawv me ntsis. Lawv feem ntau muaj cov saum toj kawg nkaus kom paub tseeb tias koj cov ntawv sau tau muab zais. Lawv kuj muaj cov tub rau khoom me me ntawm sab. Nyob rau hauv ib txoj kev, feem ntau niaj hnub sau ntawv desks yog hu ua computer desks tsuas muaj ib tug keyboard tais