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annotate scripts/examples.sql @ 1231:6487ef10c0e0

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author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Thu, 24 Aug 2023 17:06:16 -0400
parents d44eba0db517
children
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d44eba0db517 creating a file with SQL code samples
Nicolas Saunier <nicolas.saunier@polymtl.ca>
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d44eba0db517 creating a file with SQL code samples
Nicolas Saunier <nicolas.saunier@polymtl.ca>
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d44eba0db517 creating a file with SQL code samples
Nicolas Saunier <nicolas.saunier@polymtl.ca>
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3 # get object id, first and last frame numbers, length and number of features
d44eba0db517 creating a file with SQL code samples
Nicolas Saunier <nicolas.saunier@polymtl.ca>
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diff changeset
4 select OF.object_id, min(P.frame_number) as frame1, max(P.frame_number) as frame2, max(P.frame_number)-min(P.frame_number) as length, count(OF.trajectory_id) as nfeatures from positions P, objects_features OF where P.trajectory_id = OF.trajectory_id group by OF.object_id order by nfeatures asc;