我有两个两个表,一个是临时表,另一个是主表。在执行最终处理之前,用户单击刷新按钮。然后,我将数据填充到临时表中,并且需要向用户显示两个表之间的区别,例如旧值-新值。为此,我尝试下面的查询,但无法获取旧值。我越来越空了
Temporay table
+------+--------------+----------------+-----+
| asn | ean | belegnr |quantity|
+------+--------------+----------------+-----+
| 700000845 | 4046228201122| 30059314 |2 |
| 700000845 | 4046228138879| 30059314 |3 |
| 700000845 | 4046228138875| 30059320 |25 |
+------+--------------+----------------+--+--+
主表
+------+--------------+----------------+-----+
| asn | ean | belegnr |quantity|
+------+--------------+----------------+-----+
| 700000845 | 4046228201122| 30059314 |5 |
| 700000845 | 4046228138879| 30059314 |3 |
| 700000845 | 4046228138888| 30059320 |25 |
+------+--------------+----------------+--+--+
在两个表中,我在ean字段和数量字段中都有更改 为此,我正在使用此查询
SELECT
t2.id,t2.ean,t2.belegnr,t2.`quantity`,t1.`quantity` FROM
temp_table t2
LEFT OUTER JOIN details t1 ON
t1.asn = t2.asn
AND t1.ean = t2.ean
AND t1.belegnr = t2.belegnr
AND t1.quantity = t2.quantity
WHERE t2.asn = 700000845
AND t2.`belegnr` in(30059314,30059320)
AND t1.id IS NULL
以下是我的预期结果
+------+--------------+----------------+-----+----------------------
| asn | ean | oldean| belegnr |quantity|Oldqty|
+------+--------------+----------------+-----+----------------------|
| 700000845 | 4046228201122| 4046228201122 |30059314 |2 | 5 |
| 700000845 | 4046228138875| 4046228138888 |30059320 |25 | 25 |
+------+--------------+----------------+--+--+--------+-------------+
任何帮助将不胜感激。
答案 0 :(得分:0)
加入后,您将消除要称为“旧”的t1行。
假设asn是常量:
SELECT
t2.asn,t2.ean,t1.ean as oldean,t2.belegnr,t1.belegnr as oldbelegnr, t2.`quantity`,t1.`quantity` as Oldqty
FROM temp_table t2
JOIN details t1 ON t1.asn = t2.asn
WHERE
t1.ean <> t2.ean
OR t1.belegnr <> t2.belegnr
OR t1.quantity <> t2.quantity
答案 1 :(得分:0)
不是答案。评论太久了...
请注意,如果数据集如下,那么问题将同样难以理解...
Temporay桌子
+-----+-----+-----------+-------+
| asn | ean | belegnr |quantity|
+-----+-----+------------+-----+
| 845 | 1122| 14 | 2 |
| 845 | 8879| 14 | 3 |
| 845 | 8875| 20 | 25 |
+-----+------+-----------+-------+