dbdump
A database dump tool
How to use
```bash
$ dbdump -h
Database dump tool 0.2.4
yuchunzhou chunzhou.yu@qq.com
Dump database data to the file
USAGE:
dbdump [OPTIONS]
OPTIONS:
-H, --host Server address [default: 127.0.0.1]
-P, --port Server port [default: 3306]
-k, --kind Database kind [default: mysql] [possible values: sqlite, mysql,
postgresql]
-u, --user Login username
-p, --password Login password
-d, --database Database name
-t, --table Target table
-s, --start Start row [default: 0]
-n, --rows Rows count [default: 10]
-f, --format Output file format [default: csv] [possible values: csv, xls]
-o, --output