const char *sql = "INSERT INTO data(coltext, colint, coldouble) VALUES(?,?,?)";
sqlite3_prepare_v2(db, sql, 1, &stmt, NULL);
sqlite3_bind_text(stmt, 1, [txt UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_int(stmt, 2, integer);
sqlite3_bind_double(stmt, 3, dbl);
sqlite3_step(stmt);
sqlite3_finalize(stmt);