Post String to Web Service SQL

I have web service that run on my server, the web service is provide communication with SQL database server. I must send a string that contain SQL syntax to that web service.
Anyone can help me how to post a string to a web service?

Anyone can help me how to post a string to a web service?

Is it reasonable to assume that you have an Ethernet shield?

Is it reasonable to assume that you know how to make a POST request?

Yes, i have a ethernet shield.

I dont know how to post request with a long string like this:

"INSERT INTO [dbAuto].[dbo].[test] ([dept_id],[rpo_id],[qty_auto],[date_in]) VALUES ('" & "ROP2OUT" & "','" & txt_rpo_no.Text & "','" & lbl_qty.Text & "','" & tgl & "')")

it alwasys error when i put that in string variable..

my web service located at ServerUrl = "http://192.168.0.79:250/Default.aspx"

You send the server a parameter with the value in it. The server does the SQL database insertion.