CONTAINS yog ib qho piv txwv siv nyob rau hauv WHERE clause ntawm Transact-SQL SELECT nqe luslos ua SQL Server tag nrho cov ntawv tshawb fawb ntawm cov ntawv sau tag nrho cov kab ntawv uas muaj cov ntaub ntawv ua cim hom. CONTAINS tuaj yeem tshawb nrhiav: Ib lo lus lossis kab lus. … Ib lo lus nyob ze lwm lo lus.
Yuav siv li cas muaj hauv SQL?
Basic Usage and Syntax
Rau Microsoft SQL Server, CONTAINS tso cai rau cov ntawv sau tag nrho match SQL tshawb nrhiav cov lus nug ntawm koj lub rooj. Nws xa rov qab tus nqi boolean uas qhia seb qhov haujlwm puas yog qhov tseeb lossis cuav. SELECT <columnName> LOS NTAWM CHAW UA HAUJ LWM (, '');
Cov lus nug muaj dab tsi?
Cov CONTAINS kev tshawb nrhiav yuav siv ib kab ntawv thiab muaj-nug-txoj hlua raws li kev sib cavNws tuaj yeem siv nyob txhua qhov chaw tshawb nrhiav (tseem hu ua predicate) tuaj yeem raug teev tseg, thiab rov qab TRUE lossis FALSE. muaj cov lus nug-txoj hlua yuav tsum yog ib txoj hlua tas li, lossis qhov sib txawv, nrog tus nqi uas paub txog lub sijhawm nug.
Yuav siv li cas muaj nyob rau hauv Oracle SQL lus nug?
SELECT SCORE(1), lub npe los ntawm xov xwm NTAWM NO (text, 'oracle', 1) > 0 ORDER BY SCORE(1) DESC; CONTAINS tus neeg teb xov tooj yuav tsum nco ntsoov ua raws li > 0 syntax, uas qhia meej tias tus qhab nia tus nqi xa rov qab los ntawm CONTAINS tus neeg teb xov tooj yuav tsum ntau dua xoom rau kab rov qab.
Koj ua li cas thiaj kuaj tau yog tias ib daim teb muaj cov hlua hauv SQL?
- Kom nrhiav tau ib txoj hlua SELECTNTAWM [rooj] NTAWM [teb] LIKE '%stringtosearchfor%'
- -- Nrhiav ib txoj hlua tseeb.
- SELECTNTAWM [rooj] NTAWM [teb] LIKE '%stringtosearchfor%'.
