iphone开发中sqlite3惯用操作

	sqlite3 *db;	if (sqlite3_open(@"xx.db", &db) != SQLITE_OK ) {		return;	}		sqlite3_stmt *dbps;        int dbrc;        NSString *sql = @"";	const char *sqlChar = [sql UTF8String];		dbrc = sqlite3_prepare_v2(db, sqlChar, -1, &dbps, NULL);	dbrc = sqlite3_step(dbps);	if(dbrc != SQLITE_DONE){		NSLog(@"exec sql error!,sql:%@,error code:%d.",sql,dbrc);	}	sqlite3_finalize(dbps);	sqlite3_close(db);

	sqlite3 *db;	int dbrc;	sqlite3_stmt *dbps;	if (sqlite3_open(@"xx.db", &db) != SQLITE_OK ) {		NSLog(@"couldnet't open db:");		return;	}	NSString *sql = @"select * from sqlite3_master ";	const char *sqlChar = [sql UTF8String]; 	dbrc = sqlite3_prepare_v2 (db, sqlChar, -1, &dbps, NULL);	while ((dbrc = sqlite3_step (dbps)) == SQLITE_ROW) {		NSLog([[NSString alloc] initWithUTF8String:(char*) sqlite3_column_text(dbps, 0)]);	}	sqlite3_finalize(dbps);	sqlite3_close(db);