插入從tableB的表A where條件成立的情況下

Question

1問題：

我試圖插入來自tableB的TableA的領域，我有一個條件和一個columnA組的情況下，但它不工作。有沒有可能沒有更新？

insert into tableA 
select date, columnA 
from tableB 
where tableB.date between '2015-10-01' and '2015-10-31' 
set columnA = case 
       when columnA like ('%aaa%') then 'aaa' 
       when columnA like ('%bbb%') then 'bbb' 
       when columnA like ('%ccc%') then 'ccc' 
       when columnA like ('%ddd%') then 'ddd' 
       when columnA like ('%eee%') then 'eee' 
       else columnA 
       end 
; 

wchiquito回答和它的作品。

第二個問題：

此外，我想看到的第一個問題的情況下，我也日期和columnA要團的溶液。

我能做到這一點：

insert into tableA 
select date, case 
       when columnA like ('%aaa%') then 'aaa' 
       when columnA like ('%bbb%') then 'bbb' 
       when columnA like ('%ccc%') then 'ccc' 
       when columnA like ('%ddd%') then 'ddd' 
       when columnA like ('%eee%') then 'eee' 
       else columnA 
       end 
from tableB 
where tableB.date between '2015-10-01' and '2015-10-31' 
group by date, case 
       when columnA like ('%aaa%') then 'aaa' 
       when columnA like ('%bbb%') then 'bbb' 
       when columnA like ('%ccc%') then 'ccc' 
       when columnA like ('%ddd%') then 'ddd' 
       when columnA like ('%eee%') then 'eee' 
       else columnA 
       end 
; 

但我想看看是否有過另一種方式。避免雙重書寫案件的更好方法。

Answer 1

請記住，column是保留字，請參閱9.3 Keywords and Reserved Words。

請參閱：12.4 Control Flow Functions - CASE。

INSERT INTO `tableA` 
SELECT `date`, CASE 
       WHEN `column` LIKE '%aaa%' THEN 'aaa' 
       WHEN `column` LIKE '%bbb%' THEN 'bbb' 
       WHEN `column` LIKE '%ccc%' THEN 'ccc' 
       WHEN `column` LIKE '%ddd%' THEN 'ddd' 
       WHEN `column` LIKE '%eee%' THEN 'eee' 
       ELSE `column` 
       END 
FROM `tableB` 
WHERE `tableB`.`date` BETWEEN '2015-01-01' AND '2015-01-04'; 

SQL Fiddle demo