Regular expression to evaluate text for SQL statements

http://www.experts-exchange.com/Programming/Languages/C_Sharp/Q_21946011.html

string sql = ReadTextFromFile("class.cs");

Match m = Regex.Match(sql,
@"([Ss][Ee][Ll][Ee][Cc][Tt].+[Ff][Rr][Oo][Mm] +.+ +([Ww][Hh][Ee][Rr][Ee])?.+;)|([Dd][Ee][Ll][Ee][Tt][Ee](.+[Ff][Rr][Oo][Mm])? +.+;)|([Ii][Nn][Ss][Ee][Rr][Tt](.+[Ii][Nn][Tt][Oo])? +.+;)|([Uu][Pp][Dd][Aa][Tt][Ee] +.+ +[Ww][Hh][Ee][Rr][Ee].+;)");