Added some useful queries

Author: zachsa

src/useful-queries/download-summary.sql

@@ -0,0 +1,14 @@
+select
+  CAST(timestamp as date) as roundedDate,
+  submissionIds,
+  left (submissionSearch,
+    10) + '...' as truncatedSubmissionSearch,
+  emailAddress
+from
+  DownloadLog d
+  join Users u on u.id = d.userId
+where
+  name != 'Zach Smith'
+order by
+  timestamp desc;
+

src/useful-queries/login-summary.sql

@@ -0,0 +1,16 @@
+select
+  CAST(timestamp as date) as roundedDate,
+  name,
+  emailAddress,
+  COUNT(*) as loginCount
+from
+  logins l
+  join users u on u.id = l.userId
+group by
+  CAST(timestamp as date),
+  name,
+  emailAddress
+order by
+  roundedDate desc,
+  name;
+