[add sql and csv file for demo]

tests/examples/bash/demo.csv

+1503851026421, 1
+1503851026422, 2
+1503851026423, 3
+1503851026424, 4
+1503851026425, 5
+
+'2019-07-22 10:00:01.000', 6
+'2019-07-22 10:00:02.000', 7
+'2019-07-22 10:01:02.000', 8
+'2019-07-22 11:01:02.000', 9
+'2019-07-23 11:01:02.000', 10

tests/examples/bash/demo.sql

+create database if not exists db0
+create table if not exists db0.tb0 (ts timestamp, field int)
+import into db0.tb0 file demo.csv
+
+create database if not exists db1
+use db1
+create table if not exists tb1 (ts timestamp, name binary(8))
+insert into tb1 values('2010-07-23 11:01:02.000', 'xxxx')
+insert into tb1 values(now, 'aaaa');    
+insert into tb1 values(now+1a, 'bbbb'); 
+insert into tb1 values(now+1s, 'cccc'); 
+insert into tb1 values(now+1m, 'dddd'); 
+insert into tb1 values(now+1h, 'eeee'); 
+insert into tb1 values(now+1d, 'ffff'); 
+insert into tb1 values(now+1w, 'gggg');
+insert into tb1 values(now+1n, 'hhhh');
+insert into tb1 values(now+1y, 'iiii');