Question

如果value =＆＃39; 0＆＃39;我想知道是否有机会从另一个表中插入表格然后导入=＆＃39;否＆＃39;否则导入=＆＃39;是＆＃39;

现在自动开启＆＃39;是＆＃39;插入。

我的SQL查询：

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

只有在ONLY_FULL_GROUP_BY被禁用时，以上内容才有效。

如果没有，请使用：

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

检查并告诉我是否有效！。

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");

Mysql：if else从一列到另一列

2 个答案: