From 944dfc72541f14e771d71fa9424f5d05cb491c4d Mon Sep 17 00:00:00 2001
From: Vincent Cloutier <vincent@cloutier.co>
Date: Tue, 27 Dec 2022 13:31:32 -0500
Subject: [PATCH] Some useful SQL queries

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 sql.md | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
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+
+# Most common servers
+
+```SQL
+SELECT COUNT(*), host FROM followers GROUP BY host ORDER BY count DESC;
+```
+
+# Most popular twitter users
+
+```SQL
+SELECT COUNT(*), acct FROM (SELECT unnest(followings) as follow FROM followers) AS f INNER JOIN twitter_users ON f.follow=twitter_users.id GROUP BY acct ORDER BY count DESC;
+```
+
+# Most active users
+
+```SQL
+SELECT array_length(followings, 1) AS l, acct, host FROM followers ORDER BY l DESC;
+```
+
+# Lag
+
+```SQL
+SELECT COUNT(*), date_trunc('day', lastsync) FROM (SELECT unnest(followings) as follow FROM followers GROUP BY follow) AS f INNER JOIN twitter_users ON f.follow=twitter_users.id GROUP BY date_trunc;
+```