[英]If/Then Statement
$data = $con->query("SELECT id, content FROM table1 WHERE id IN (". $column['data'] .")");
我上面有需要添加if then語句的代碼。
if table1.draftid = 0, then select content from table 1
if table1.draftid != 0, then select content from table 2
僅供參考....如果TABLE1.DRAFTID!= 0,則
table1.draftid = table2.id
我嘗試了以下方法。
$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
預期的結果:
If table 1 draftid = 0
,那么它將調用表1中的內容。但是,如果table1.draftid != 0
(例如:1),那么它將從表2中的內容中提取出table1.draftid = table2.id
你可以試試這個嗎?
$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'] .")");
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