使用where條件將表中的數據插入MySQL中的另一個表

Question

我嘗試使用此命令將tblDoXang中的所有記錄插入滿足條件的tblDoXang1中：

insert into gtse.tblDoXang1
SELECT *
FROM `gtse`.`tblDoXang`
where concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), nhienLieu) in
    (select
        concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), max(nhienLieu))
        from gtse.tblDoXang
 -- where accountID = 'anhtuaniphone' and deviceID = '14C-10152'
-- and from_unixtime(thoiGian) between '2014-11-01 00:00:02' and '2014-11-17 23:59:59'
        group by
        date(from_unixtime(thoiGian)),
        hour(from_unixtime(thoiGian)));

它向我顯示了以下消息： 7432 row(s) affected 。 之后，我使用此查詢檢查新表（tblDoXang1）中的數據：

SELECT from_unixtime(thoiGian), nhienLieu
FROM `gtse`.`tblDoXang1`

然后我看到： 7432 row(s) returned 。 我還檢查了舊表（tblDoXang）的條件：

SELECT *
FROM `gtse`.`tblDoXang`
where concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), nhienLieu) in
    (select
        concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), max(nhienLieu))
        from gtse.tblDoXang
 -- where accountID = 'anhtuaniphone' and deviceID = '14C-10152'
-- and from_unixtime(thoiGian) between '2014-11-01 00:00:02' and '2014-11-17 23:59:59'
        group by
        date(from_unixtime(thoiGian)),
        hour(from_unixtime(thoiGian)));

它也返回了7432行。 但是，當我使用特定值進行測試時，我收到了兩個不同的結果（我希望它們是相同的）。 該查詢返回了兩條記錄（我從新表中選擇）：

select from_unixtime(thoiGian), nhienLieu
from gtse.tblDoXang1
where
(from_unixtime(thoiGian) between '2014-10-01 00:00:02' and '2014-11-18 23:59:59')
and accountID = 'vinhnghia' 
and deviceID = '14C-00263'

而這拋出了5條記錄（條件相同）（我從舊表中選擇了要在上面的第一個查詢中插入的條件）：

SELECT *
FROM `gtse`.`tblDoXang`
where concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), nhienLieu) in
    (select
        concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), max(nhienLieu))
        from gtse.tblDoXang
        where accountID = 'vingnghia' and deviceID = '14C-00263'
       and from_unixtime(thoiGian) between '2014-10-01 00:00:02' and '2014-11-18 23:59:59'
        group by
        date(from_unixtime(thoiGian)),
        hour(from_unixtime(thoiGian)));

我對這個結果感到困惑，不知道自己到底在哪里錯，所以有人可以給我一些建議嗎？ 提前致謝。

Answer 1

我發現了我的錯誤。 在此查詢中：

SELECT *
FROM `gtse`.`tblDoXang`
where concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), nhienLieu) in
    (select
        concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), max(nhienLieu))
        from gtse.tblDoXang
 -- where accountID = 'anhtuaniphone' and deviceID = '14C-10152'
-- and from_unixtime(thoiGian) between '2014-11-01 00:00:02' and '2014-11-17 23:59:59'
        group by
        date(from_unixtime(thoiGian)),
        hour(from_unixtime(thoiGian)));

我沒有指定時間，accountID和deviceID。 它不同於：

SELECT *
FROM `gtse`.`tblDoXang`
where concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), nhienLieu) in
    (select
        concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), max(nhienLieu))
        from gtse.tblDoXang
        where accountID = 'vingnghia' and deviceID = '14C-00263'
       and from_unixtime(thoiGian) between '2014-10-01 00:00:02' and '2014-11-18 23:59:59'
        group by
        date(from_unixtime(thoiGian)),
        hour(from_unixtime(thoiGian)));

我在哪里有具體的地方條件。 所以查詢：

select from_unixtime(thoiGian), nhienLieu
from gtse.tblDoXang1
where
(from_unixtime(thoiGian) between '2014-10-01 00:00:02' and '2014-11-18 23:59:59')
and accountID = 'vinhnghia' 
and deviceID = '14C-00263'

對應於此：

SELECT from_unixtime(thoiGian), nhienLieu
FROM (
SELECT *
FROM `gtse`.`tblDoXang`
where concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), nhienLieu) in
    (select
        concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), max(nhienLieu))
        from gtse.tblDoXang
        group by
        date(from_unixtime(thoiGian)),
        hour(from_unixtime(thoiGian)))
) as t
where accountID = 'vinhnghia' 
and deviceID = '14C-00263'
and from_unixtime(thoiGian) between '2014-10-01 00:00:00' and '2014-11-18 23:59:59'
order by thoiGian asc;

這就是為什么我從上面的兩個查詢中得到不同結果的原因。

Answer 2

你的主意不好。 請想象您總共有十個帳戶。 使用此查詢：

SELECT *
FROM `gtse`.`tblDoXang`
where concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), nhienLieu) in
    (select
        concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), max(nhienLieu))
        from gtse.tblDoXang
 -- where accountID = 'anhtuaniphone' and deviceID = '14C-10152'
-- and from_unixtime(thoiGian) between '2014-11-01 00:00:02' and '2014-11-17 23:59:59'
        group by
        date(from_unixtime(thoiGian)),
        hour(from_unixtime(thoiGian)));

您只會在十個帳戶的每個小時中收到一小時的最大值（ nhienLieu ），而不是一個帳戶的預期值。 因此，這就是兩種情況下結果不同的原因：當您專門指定accountID，deviceID和thoiGian時，以及在表中選擇全部時。 我認為此查詢將滿足您的目標：

SELECT *
FROM `gtse`.`tblDoXang`
where concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), nhienLieu) in
    (select
        concat(date(from_unixtime(thoiGian)), hour(from_unixtime(thoiGian)), max(nhienLieu))
        from gtse.tblDoXang
 -- where accountID = 'anhtuaniphone' and deviceID = '14C-10152'
-- and from_unixtime(thoiGian) between '2014-11-01 00:00:02' and '2014-11-17 23:59:59'
        group by
        date(from_unixtime(thoiGian)),
        hour(from_unixtime(thoiGian)),
        accountID,deviceID);

請嘗試一下，如果有的話告訴我任何問題。