php - 从MySQL两张表中获取数据并排序

Question

我有table_1 和table_2，它们是相同的结构，但数据不同。需要以 create_date 的形式从该表中获取所有数据，无论来自哪个表(它可以是来自 table_1 的 1 行，来自 table_2 的 3 行，然后再次来自 table_1)。是否可以？如何？或者喊我得到两个查询，然后用 PHP 按日期排序？

编辑:对于第一部分，我感到很抱歉，我以为我可以从那里做到，但似乎我做不到:/

我有这样一个非常大的查询

SELECT 
    table_1.id, 
    table_1.created, 
    table_1.qty, 
    table_1.comments, 
    table_1.last_update, 
    table_7.firstname, 
    SUBSTRING(table_7.lastname, 1, 1) AS lastname, 
    table_8.title country, 
    table_3.value AS sim, 
    table_1.offer_request, 
    table_5.manufacturer AS manufacturer, 
    table_4.name AS model, 
    table_6.value AS specifications, 
    table_9.value as shipping, 
    table_1.model AS mid, 
    table_1.user_id, 
    table_1.callme, 
    table_1.phoneprice, 
    table_1.phoneprice_eur, 
    table_1.currency, 
    table_1.sel_buy_show_all, 
    table_1.seller_buyer
FROM (`table_1`)

LEFT JOIN `table_3` ON `table_3`.`id` = `table_1`.`sim`
LEFT JOIN `table_4` ON `table_4`.`id` = `table_1`.`model`
LEFT JOIN `table_5` ON `table_5`.`id` = `table_1`.`manufacturer`
LEFT JOIN `table_6` ON `table_6`.`id` = `table_1`.`specifications`
LEFT JOIN `table_7` ON `table_7`.`id` = `table_1`.`user_id`
LEFT JOIN `table_8` ON `table_7`.`country`=`table_8`.`id`
LEFT JOIN `table_9` ON `table_9`.`id` = `table_1`.`types`
WHERE `table_1`.`status` =  '1'
AND `table_1`.`deleted` =  '0'
ORDER BY `last_update` DESC
LIMIT 200

还有 table_1，它的结构与 table_2 相同，我需要以某种方式将 table_2 插入到查询中，所有连接都像 table_1

Answer 1

如果我答对了你的问题，你可以像这样使用 union -

select * from table_1 union select * from table_2 order by create_date desc

编辑

像这样创建一个 View -

create view table_1And2 as select * from table_1 union select * from table_2

table_1And2这个名字不好，起个有意义的名字。

然后像这样修改您的长查询 -

SELECT 
table_1And2.id, 
table_1And2.created, 
table_1And2.qty, 
table_1And2.comments, 
table_1And2.last_update, 
table_7.firstname, 
SUBSTRING(table_7.lastname, 1, 1) AS lastname, 
table_8.title country, 
table_3.value AS sim, 
table_1And2.offer_request, 
table_5.manufacturer AS manufacturer, 
table_4.name AS model, 
table_6.value AS specifications, 
table_9.value as shipping, 
table_1And2.model AS mid, 
table_1And2.user_id, 
table_1And2.callme, 
table_1And2.phoneprice, 
table_1And2.phoneprice_eur, 
table_1And2.currency, 
table_1And2.sel_buy_show_all, 
table_1And2.seller_buyer
FROM (`table_1And2`)

LEFT JOIN `table_3` ON `table_3`.`id` = `table_1And2`.`sim`
LEFT JOIN `table_4` ON `table_4`.`id` = `table_1And2`.`model`
LEFT JOIN `table_5` ON `table_5`.`id` = `table_1And2`.`manufacturer`
LEFT JOIN `table_6` ON `table_6`.`id` = `table_1And2`.`specifications`
LEFT JOIN `table_7` ON `table_7`.`id` = `table_1And2`.`user_id`
LEFT JOIN `table_8` ON `table_7`.`country`=`table_8`.`id`
LEFT JOIN `table_9` ON `table_9`.`id` = `table_1And2`.`types`
WHERE `table_1And2`.`status` =  '1'
AND `table_1And2`.`deleted` =  '0'
ORDER BY `last_update` DESC
LIMIT 200