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Selecting records with variable value

I want to select all records that contains a variable value from a table. Can I do it like this:
X  :=  '1234';

Select studentID from personnel where studentID like X;

Is there a way to get it to understand what it is looking for is a variable value and not a literal value? I have tried:

studentID like '%X%'

studentID like '%{X}%'

studentID like "'%"X"%'"

Any ideas welcome.

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Try this:
    x := '1234';
     xplus :='%'||x||'%';

    where studentid like xplus;

This was first published in July 2006

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