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Cov lus nug xam phaj ntawm SQL yog dab tsi?
Cov lus nug xam phaj ntawm SQL yog dab tsi?

Video: Cov lus nug xam phaj ntawm SQL yog dab tsi?

Video: Cov lus nug xam phaj ntawm SQL yog dab tsi?
Video: Kev Muag Khoom thiab Kev Sib Cuam Tshuam Nrog Cov Neeg Qhua Yam Muaj Kev Nyab Xeeb 2024, Kaum ib hlis
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Sab saum toj 50 SQL Interview Cov Lus Nug & Lus Teb

  • DBMS yog dab tsi?
  • RDBMS yog dab tsi?
  • Piv txwv: SQL ntawv Server.
  • Dab tsi yog SQL ntawv ?
  • Database yog dab tsi?
  • Cov rooj thiab Fields yog dab tsi?
  • Qhov tseem ceeb yog dab tsi?
  • Dab tsi yog tus yuam sij tshwj xeeb?

Ntawm no, lo lus nug SQL yog dab tsi?

SQL ntawv stands rau Structured Query Language. Nws yog alanguage siv los cuam tshuam nrog cov ntaub ntawv, piv txwv li los tsim adatabase, tsim ib lub rooj hauv cov ntaub ntawv, khaws cov ntaub ntawv lossis hloov kho lub rooj hauv database thiab lwm yam. SQL ntawv yog ANSI (AmericanNational Standards Institute) tus qauv.

Tsis tas li ntawd, SQL commands yog dab tsi? Cov lus txib yog CREATE, ALTER, DROP, RENAME, thiab TRUNCATE. Data Manipulation Language (DML) - Cov no SQL lus txib yog siv rau khaws cia, rov qab, hloov kho, thiab tshem tawm cov ntaub ntawv. Cov ntaub ntawv Manipulation Language lus txib yog: SELECT, INSERT, UPDATE, thiab DELETE.

Qhov thib ob, qhov lus txib SQL tshaj plaws yog dab tsi?

SELECT yog nyob deb ntawm feem ntau tseem ceeb nqe lus , as well as cov feem ntau siv nqe lus hauv SQL ntawv . Nws yog siv los muab cov ntaub ntawv los ntawm adatable.

SQL stands rau dab tsi?

Structured Query Language

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