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SQL Tutorial for Beginners

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SQL Like

The LIKE operator is used with WHERE to search for some pattern in a string.

The pattern is usually some kind of Regular Expression that is built with some rules, but we won't dive deep into it. In the meantime, the following rules are enough for you:

  • % means 0 or more symbols: a% matches a, aa, aaaaa, etc. b%d matches bd, bad, bored, etc.

  • _ matches single symbol. t_ee matches tree, twee etc, and _o%_ match wow, coooow, soap etc., but not so for example.

In this example all singers with the naming of two separate words, both consist of at least one symbol.


              
12

            
SELECT singer FROM songs
WHERE singer LIKE '_% _%'
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Opgave

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Select all singers with naming starting with A.

Løsning

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Sektion 3. Kapitel 2
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book
SQL Like

The LIKE operator is used with WHERE to search for some pattern in a string.

The pattern is usually some kind of Regular Expression that is built with some rules, but we won't dive deep into it. In the meantime, the following rules are enough for you:

  • % means 0 or more symbols: a% matches a, aa, aaaaa, etc. b%d matches bd, bad, bored, etc.

  • _ matches single symbol. t_ee matches tree, twee etc, and _o%_ match wow, coooow, soap etc., but not so for example.

In this example all singers with the naming of two separate words, both consist of at least one symbol.


              
12

            
SELECT singer FROM songs
WHERE singer LIKE '_% _%'
copy
Opgave

Swipe to start coding

Select all singers with naming starting with A.

Løsning

Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 3. Kapitel 2
Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Vi beklager, at noget gik galt. Hvad skete der?
some-alt