diff --git a/sql.md b/sql.md
index 352a078..58a4522 100644
--- a/sql.md
+++ b/sql.md
@@ -29,6 +29,15 @@ SELECT COUNT(*), date_trunc('day', lastsync) FROM (SELECT unnest(followings) as
 SELECT COUNT(*), date_trunc('hour', 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 ORDER BY date_trunc;
 ```
 
+Lag by shards: 
+
+```SQL
+SELECT min(lastsync), mod(id, 100) FROM
+    (SELECT acct, id, lastsync FROM (SELECT unnest(followings) as follow FROM followers) AS f INNER JOIN twitter_users ON f.follow=twitter_users.id) AS f
+GROUP BY mod
+ORDER BY min;
+```
+
 # Connections 
 
 ```SQL