update churned rows sql table

suppose there entirely populated array information string[n][3] mydata.

i wish this:

for (string[] quarrel : mydata)
{
   sql = "update mytable set col3 = row[2]
   where col1 = row[0] col2=row[1];" 
}

obviously i've left lot out, nonetheless i wish demonstrate thought succinctly possible.

is there rudimentary proceed doing unparalleled db command?
how rudimentary way?

edits:
data opening another list (it's web form defeat - churned choice exam)

seeing app web facing, it's got injection proof. parameterized queries comparison proceed going.

i'm controlling ms-sql server 2005

edit:closing, re-asking

edit: re-opened, appears renouned question