$data = $con->query("SELECT id, content FROM table1 WHERE id IN (". $column['data'] .")");
我已经获得了上面的代码,我需要在。
中添加if then语句if table1.draftid = 0, then select content from table 1
if table1.draftid != 0, then select content from table 2
仅供参考.... IF TABLE1.DRAFTID!= 0,然后是
table1.draftid = table2.id
我尝试了以下内容..
$data = $con->query("SELECT table1.id,
(case
when table1.draftid = 0 then table1.content
when table1.draftid != 0 then (select table2.content from table2 where table1.draftid = table2.id)
end) as data,
FROM table1
JOIN table2 ON table1.draftid = table2.id
WHERE table1.id IN (". $column['data'] .")");
> Table 1
>
>id = 1
>
>draftid = 1
>
>content = Table 1 Test
---------
> Table 2
>
> id = 1
>
> content = Table 2 Content
期望的结果:
If table 1 draftid = 0
,然后它会调用 来自表1的内容。但是,如果table1.draftid != 0
(例如:1),则>那么它将从表2中提取内容table1.draftid = table2.id
答案 0 :(得分:1)
你能试试吗?
$data = $con->query("SELECT table1.id,
(case
when table1.draftid = 0 then table1.content
when table1.draftid != 0 then table2.content
end) as data,
FROM table1
JOIN table2 ON table1.draftid = table2.id
WHERE table1.id IN (". $column['data'] .")");