mysql -e "select count(*) from user where default_role != ''";done
*** labsdb1009 ***
+----------+
| count(*) |
+----------+
|     4025 |
+----------+
*** labsdb1011 ***
+----------+
| count(*) |
+----------+
|       34 |
+----------+
*** db1141 ***
+----------+
| count(*) |
+----------+
|       28 |
+----------+