查詢語句基本格式：
select * from table limit (start-1)*limit,limit
實際按下記語句格式是無法正確執行的：
select * from table ORDER BY creationtime limit (2-1)*5,5
正確執行語句如下（通過子查詢實現）：
select * from table ORDER BY creationtime limit 5,5
或者
SELECT * FROM tableWHERE creationtime >=
(SELECT creationtime FROM table ORDER BY creationtime LIMIT 5, 1)
ORDER BY creationtime LIMIT 5;
