Motivation

Sometimes you need to retrieve data from a database without knowing the exact string to look up

so wildcards for the rescue

Underscore

Se_en represents a pattern with a wildcard character.

The _ means you can substitute any individual character here without breaking the pattern.

It matches exactly one character.

The names Seven and Se7en both match this pattern.

Percentage sign

The percentage sign % is another wildcard character that can be used with LIKE.

It matches one or more characters

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