Itds 
A deadly simple SQL server CLI tools just to ease the developer working on Mac or Linux.
Dependency
Install freetds using the package manager of your system.
Mac
$homebrew install freetds
Ubuntu
$sudo apt-get install freetds-dev
Install
$gem install itds
Usage
Help
$itds --help
Command parameters:
$itds -h <hostname> -p <password> -u <username> -d <contained_database> [SQL]
Execute a command
$itds -h <hostname> -d <database> select 1
+---+
+---+
| 1 |
+---+
Cancel a request in interactive mode.
$itds -h <hostname> -d <mydb>
mydb> waitfor delay '00:00:04'
^C
mydb> select * from test
+----+
| id |
+----+
| 10 |
+----+
mydb> ^C
$