插入从tableB的表A where条件成立的情况下

Question

1问题：

我试图插入来自tableB的TableA的领域，我有一个条件和一个columnA组的情况下，但它不工作。有没有可能没有更新？

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。

第二个问题：

此外，我想看到的第一个问题的情况下，我也日期和columnA要团的溶液。

我能做到这一点：

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 
; 

但我想看看是否有过另一种方式。避免双重书写案件的更好方法。

Answer 1

请记住，column是保留字，请参阅9.3 Keywords and Reserved Words。

请参阅：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