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Samenvatting SELECT, INSERT, UPDATE, DELETE, LIKE en DISTICT $3.22
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Samenvatting SELECT, INSERT, UPDATE, DELETE, LIKE en DISTICT

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SQL samenvatting betreft SELECT, INSERT, UPDATE, DELETE, LIKE en DISTINCT. Uitleg aan de hand van voorbeelden.

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  • January 7, 2019
  • 6
  • 2018/2019
  • Summary
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Structured Query Language (SQL) – Hoorcollege 1
SELECT




SELECT * (alle kolommen)
FROM les




SELECT docent, klas
FROM les




SELECT *
FROM les
WHERE module = ‘ICT.P.DBO’ (voorwaarde)

, SELECT *
FROM les
ORDER BY module DESC(z tot a), docent ASC (a tot z en mag je weglaten)

Samenvatting
SELECT = beperkt het aantal kolommen in het resultaat
FROM = van welke tabel
WHERE = beperkt het aantal kolommen in het resultaat
ORDER BY = beperkt het aantal kolommen in het resultaat


INSERT

Paul met docentcode VNP01 gaat SQL geven (ICT.P.SQL) aan klas ICTM1c.




INSERT INTO les
VALUES (‘ICT.P.SQL’, ‘VNP01’, ‘ICTM1c’)

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