iOS sqlite3数据库查询

我用下面的代码查询数据库，但是第一行数据没有显示，显示的是从第二行开始的数据。为什么？怎噩梦才能查询全部行的数据？
while (sqlite3_step(statement) == SQLITE_ROW) {
            
            char *name = (char *)sqlite3_column_text(statement, 0);
            NSString *nameStr = [[NSString alloc] initWithUTF8String:name];
            
            char *email = (char *)sqlite3_column_text(statement, 1);
            NSString *emailStr = [[NSString alloc] initWithUTF8String:email];
            
            char *birthday = (char *)sqlite3_column_text(statement, 2);
            NSString *birthdayStr = [[NSString alloc] initWithUTF8String:birthday];
            
            NSString *info = [[NSString alloc] initWithFormat:@"%@ - %@ - %@",
                              nameStr, emailStr, birthdayStr];
            
            NSLog(info);
            
            [nameStr release];
            [emailStr release];
            [birthdayStr release];
            [info release];
        }
        sqlite3_finalize(statement);