如何將某些行的列值設置爲與同一表中的其他行相同？

Question

表架構：

+----------------------+---------------+------+-----+---------+-------+ 
| Field    | Type   | Null | Key | Default | Extra | 
+----------------------+---------------+------+-----+---------+-------+ 
| name     | varchar(10) | YES | MUL | NULL |  | 
| slno     | varchar(20) | YES |  | NULL |  | 
| type     | int(2)  | YES |  | NULL |  | 
| details    | text   | YES |  | NULL |  | 
+----------------------+---------------+------+-----+---------+-------+ 

名稱，slno並鍵入一起形成鍵。

的樣本數據：

+---------+------+------+-------------------------------+ 
| name | slno | type | details      | 
+---------+------+------+-------------------------------+ 
| name1 | 11 | 1 | {"data":["feats1","feats2"] } | 
| name1 | 11 | 2 | {"data":["feats1","feats2"] } | 
| name1 | 12 | 1 | {"data":["feats5","feats6"] } | 
| name1 | 12 | 2 | {"data":["feats5","feats6"] } | 
| name2 | 11 | 1 | {"data":["feats3","feats4"] } | 
| name2 | 11 | 2 | {"data":["feats3","feats4"] } | 
| name2 | 12 | 1 | {"data":["feats7","feats8"] } | 
| name2 | 12 | 2 | {"data":["feats10"] }   | 
+---------+------+------+-------------------------------+ 

所以基本上與NAME = '名稱1' 中的每個條目，有一個與同slno但名稱= '名2' 類似的條目。
我想要做的是對具有相同slno和類型但名稱不同的行設置相同的細節，即上面的示例數據集應該如下所示。 name2行'的細節應該匹配name1行的細節，如果他們有相同的slno和類型。

+---------+------+------+-------------------------------+ 
| name | slno | type | details      | 
+---------+------+------+-------------------------------+ 
| name1 | 11 | 1 | {"data":["feats1","feats2"] } | 
| name1 | 11 | 2 | {"data":["feats1","feats2"] } | 
| name1 | 12 | 1 | {"data":["feats5","feats6"] } | 
| name1 | 12 | 2 | {"data":["feats5","feats6"] } | 
| name2 | 11 | 1 | {"data":["feats1","feats2"] } | 
| name2 | 11 | 2 | {"data":["feats1","feats2"] } | 
| name2 | 12 | 1 | {"data":["feats5","feats6"] } | 
| name2 | 12 | 2 | {"data":["feats5","feats6"] } | 
+---------+------+------+-------------------------------+ 

我試過了，但是不能拿出執行上述結果的命令。有人可以幫忙嗎？

Answer 1

如果要求給NAME2詳細介紹了值從NAME1的詳細信息，你可以做到這一點在MySQL與join基於更新

update yourTable as t1 
join yourTable as t2 
on  t1.slno = t2.slno and 
     t1.type = t2.type 
set  t2.details = t1.details 
where t2.name = 'name2' and 
     t1.name = 'name1' 

可以達到同樣也朝着我放在where條件子句的join條件

update yourTable as t1 
join yourTable as t2 
on  t1.slno = t2.slno and 
     t1.type = t2.type and 
     t2.name = 'name2' and 
     t1.name = 'name1' 
set  t2.details = t1.details 

你可以看到在行動這兩個查詢here