我如何獲得我的表格的最新記錄

Question

如何從表格中獲取最新日期。 如果我告訴你我的意思，也許會更好。

這是我目前的表格輸出

TransactionID          Title           Date
23132                  Locaton         2013-05-17 10:02:04
23131                  Novuel          2013-05-16 16:26:45
23130                  Novuel          2013-05-16 11:41:21
23129                  Locaton         2013-05-15 15:02:47
23128                  Mama Rosa       2013-05-15 14:42:44
23127                  Locaton         2013-05-14 18:21:32
23126                  Rohan           2013-05-14 12:46:56

這是期望的輸出：

TransactionID          Title           Date
23132                  Locaton         2013-05-17 10:02:04
23131                  Novuel          2013-05-16 16:26:45
23128                  Mama Rosa       2013-05-15 14:42:44
23126                  Rohan           2013-05-14 12:46:56

你可以這樣我只想從mysql的每個標題中獲取最新日期。

這就是我到目前為止嘗試獲得所需輸出的方法：

    ("SELECT t.transactionid,
       ct.title,
       max(t.transactiontime)
FROM exp_channel_titles AS ct
LEFT JOIN transactions AS t ON (ct.entry_id = t.restaurant_id)
WHERE t.transactiontime IN
    (SELECT max(t.transactiontime)
     FROM transactions AS t)
GROUP BY ct.entry_id
ORDER BY t.transactiontime DESC");

Answer 1

select * from t t1
where 
NOT EXISTS (select transactionID 
                from t where t.Title=t1.title
                         and t.date>t1.date)

SQLFiddle演示

Answer 2

你可以試試這個：

SELECT t1.transactionid, ct.title, t1.transactiontime
FROM exp_channel_titles as ct
LEFT JOIN
(Select t.* from transactions as t 
INNER join (SELECT max(TransactionID) FROM transactions group by Title having     transactiontime=max(transactiontime) ) temp
ON temp.TransactionID= t.TransactionID) as t1
on ct.entry_id = t1.restaurant_id

Answer 3

SELECT MAX(t.transactionid) AS TRANSACTION_ID, ct.title, MAX(t.transactiontime)
FROM exp_channel_titles as ct
LEFT JOIN transactions as t 
on (ct.entry_id = t.restaurant_id)
GROUP BY CT.TITLE

Answer 4

試試這個： w3schools

不確定這是不是你的意思