1 files changed, 55 insertions, 0 deletions
diff --git a/sql/random_queries.md b/sql/random_queries.md
new file mode 100644
index 0000000..6ae651a
--- /dev/null
+++ b/sql/random_queries.md
@@ -0,0 +1,55 @@
+
+Basic stats (2019-09-23):
+
+    SELECT COUNT(*) FROM cdx WHERE NOT EXISTS (SELECT grobid.sha1hex FROM grobid WHERE cdx.sha1hex = grobid.sha1hex);
+    => 28,023,760
+    => Time: 253897.213 ms (04:13.897)
+
+    SELECT COUNT(DISTINCT sha1hex) FROM cdx WHERE NOT EXISTS (SELECT grobid.sha1hex FROM grobid WHERE cdx.sha1hex = grobid.sha1hex);
+    => 22,816,087
+    => Time: 287097.944 ms (04:47.098)
+
+    SELECT COUNT(*) FROM grobid.
+    => 56,196,992
+
+    SELECT COUNT(DISTINCT sha1hex) FROM cdx;
+    => 64,348,277
+    => Time: 572383.931 ms (09:32.384)
+
+    SELECT COUNT(*) FROM cdx;
+    => 74,796,777
+
+    SELECT mimetype, COUNT(*) FROM cdx GROUP BY mimetype ORDER BY COUNT(*) DESC;
+    => Time: 189067.335 ms (03:09.067)
+
+                mimetype        |  count   
+        ------------------------+----------
+         application/pdf        | 51049905
+         text/html              | 24841846
+         text/xml               |   524682
+         application/postscript |    81009
+        (4 rows)
+
+Time: 189067.335 ms (03:09.067)
+
+    SELECT status_code, COUNT(*) FROM grobid GROUP BY status_code ORDER BY count(*) DESC;
+
+         status_code |  count   
+        -------------+----------
+                 200 | 56196992
+
+    compare with older sandcrawler/output-prod/2019-05-28-1920.35-statuscodecount:
+
+        200     49567139
+        400     3464503
+        409     691917
+        500     247028
+        503     123
+
+    SELECT row_to_json(cdx) FROM cdx LIMIT 5;
+
+    SELECT row_to_json(r) FROM (
+        SELECT url, datetime FROM cdx
+    ) r
+    LIMIT 5;
+