0: jdbc:hive2://localhost:10000> select `_1` from test where `_1` == 40;
+-----+--+
| _1  |
+-----+--+
| 40  |
+-----+--+
1 row selected (0.109 seconds)
0: jdbc:hive2://localhost:10000> select count (*) from test;
+----------+--+
|   _c0    |
+----------+--+
| 1000000  |
+----------+--+
1 row selected (0.081 seconds)