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I have two layers, one is a grid of circles and the other is all Census Block Groups (CBG) in the state of Florida. I created a Virtual Layer out of this code

SELECT CirclesFlorida.name, group_concat(cbgFl.FIPS)
FROM CirclesFlorida
LEFT JOIN cbgFl ON ST_Intersects(circlesFlorida.geometry, cbgFl.geometry)
GROUP BY circlesflorida.name

The purpose is for each circle to have a data column which lists every CBG that falls in that circle.

Is there a faster way to do this? Maybe DB Manager? Currently the query takes 20 minutes to run and another 5 minutes to just open the attribute table of the Virtual Layer.

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