Cov txheej txheem:
Video: Puas yog ntxig cov lus nug?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
SQL - INSERT Query . Lub SQL INSERT INTO Statement yog siv los ntxiv cov kab tshiab ntawm cov ntaub ntawv rau lub rooj hauv cov ntaub ntawv.
Cov lus nug tseem yog, peb tuaj yeem siv qhov twg hauv cov lus nug ntxiv?
Koj siv qhov WHERE clause rau UPDATE lus nug . Thaum twg koj INSERT , koj yog xav tias kab tsis muaj nyob. Hauv MySQL, yog koj xav INSERT los yog UPDATE, koj siv tau lub REPLACE nug nrog ib lo lus hais txog qhov twg. Yog tsis muaj qhov twg, nws NPAJ , txwv tsis pub nws UPDATES.
Qhov thib ob, qhov ntxig ua dab tsi hauv SQL? Cov SQL INSERT nqe lus yog siv rau ntxig ib lossis ntau cov ntaub ntawv rau hauv ib lub rooj. Muaj 2 syntaxs rau cov INSERT nqe lus nyob ntawm seb koj puas yog ntxig ib daim ntawv los yog ntau cov ntaub ntawv.
Dhau li ntawm no, Insert command yog dab tsi?
Ntxig yog ib tug dav-siv lus txib hauv Structured Query Language (SQL) data manipulation language (DML) siv los ntawm SQL Server thiab Oracle relational databases. Cov ntxig lus txib yog siv rau ntxig ib los yog ntau kab rau hauv ib lub rooj database nrog cov lus teev kab ke.
Kuv tuaj yeem ntxiv qhov tseem ceeb rau ib kem tshwj xeeb hauv SQL li cas?
SQL | INSERT INTO nqe lus
- Tsuas yog qhov tseem ceeb: Thawj txoj hauv kev tsuas yog qhia tus nqi ntawm cov ntaub ntawv yuav tsum tau muab tso rau yam tsis muaj cov npe kab. INSERT INTO table_name VALUES (value1, value2, value3, …);
- Kem npe thiab qhov tseem ceeb ob qho tib si: Hauv txoj kev thib ob peb yuav qhia ob kab ntawv uas peb xav sau thiab lawv cov txiaj ntsig zoo raws li qhia hauv qab no:
Pom zoo:
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