INSERT INTO table_name (c1,c2,c3) VALUES ('',N'user','','1970-01-01 00:00:00.0')

table_name
c1,c2,c3
'',N'user','','1970-01-01 00:00:00.0'

final String regex = "((?<=(INSERT\sINTO\s))[\w\d_]+(?=\s+))|((?<=\()([\w\d_,]*|[N?'?.*\s?.*'?,]*)+(?=\)))";

table_name
c1,c2,c3
'',N'user',''

final String regex = "((?<=(INSERT\sINTO\s))[\w\d_]+(?=\s+))|((?<=\()([\w\d_,]*|[N?'?.*\s?.*'?,]*)+(?=\)))";

        String test = "INSERT INTO table_name (c1,c2,c3) VALUES ('',N'user','','1970-01-01 00:00:00.0')";

        Pattern re = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);

        Matcher m = re.matcher(test);
        while (m.find())
        {
            System.out.println(m.group(0));
        }