Mysql：if else else from one column to another column

Question

我想知道如果value ='0'是否有機會從另一個表插入表中，那麼import ='no'else import ='yes'

現在插入時自動爲'yes'。

我的SQL查詢：

insert into table_3 (name, data, type, value, import) 
select name_batch, data_of_insert, 'File 2', SUM(value), 'yes' 
from table_2 
WHERE data_of_insert > DATE_SUB(now(), INTERVAL 1 SECOND) 
group by name_batch"); 

Answer 1

您可以使用CASE：

insert into table_3 (name, data, type, value, import) 
select name_batch, data_of_insert, 'File 2', SUM(value), 
    case when SUM(value) = 0 then 'no' else 'yes' end 
from table_2 
where data_of_insert > DATE_SUB(now(), INTERVAL 1 SECOND) 
group by name_batch 

上述工作只有ONLY_FULL_GROUP_BY被禁用。

如果沒有，使用：

insert into table_3 (name, data, type, value, import) 
select name_batch, data_of_insert, 'File 2', SUM(value), 
    case when SUM(value) = 0 then 'no' else 'yes' end 
from table_2 
where data_of_insert > DATE_SUB(now(), INTERVAL 1 SECOND) 
group by name_batch, data_of_insert 

Answer 2

檢查這一點，如果作品告訴我！

insert into table_3 (name, data, type, value, import) 
select name_batch, data_of_insert, 'File 2', SUM(value), IF(SUM(value)=0, 'no', 'yes') as value 
from table_2 
WHERE data_of_insert > DATE_SUB(now(), INTERVAL 1 SECOND) 
group by name_batch");