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I have a spatialite point table (p1) with an additonal column (pid) that relates each point to a point in another point table (p0) in the same database. I want to create a line between every pair of points where p1.pid matches p0.id. This is a 1:1 relation.

How can I do that in spatialite or in QGIS 2.14?

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A solution was actually buried in this answer, which I could modify for my problem:

SELECT MakeLine(p0.geom, p1.geometry) AS link_line FROM "buildings_p0" p0, "roadpoints_p1" p1 WHERE p1.pid = p0.id;

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