帶有IF條件的SELECT語句MySQL

Question

我有一張桌子，有幾列

menu_id , parent_id, controller , action , action_edit , action_view , 


select * from test where  
( action like 'my_action.php' or 
action_edit like '%my_action.php%' or 
action_view like '%my_action.php%'
) AND parent_id !=0 ORDER BY `controller` ASC 

當action或action_view或action_edit為home.php >時，我想省略parent_id !=0 。

我嘗試使用

AND IF(action='home.php' OR action_view='home.php' OR action_edit='home.php',parent !=0,)代替AND parent_id !=0但這給了我一個令牌不匹配錯誤

但沒有用，請先謝謝你:)

Answer 1

嘗試這樣的事情：

select *
from test
where  'home.php' not in (action, action_view, action_edit) or parent_id <> 0) and
       (action like 'my_action.php' or action_edit like '%my_action.php%' or 
        action_view like '%my_action.php%'
       )

編輯：

not in是危險not in 。 讓我們使用coalesce()預防問題：

select *
from test
where  'home.php' not in (coalesce(action, ''), coalesce(action_view, ''), coalesce(action_edit, '')) or parent_id <> 0) and
       (action like 'my_action.php' or action_edit like '%my_action.php%' or 
        action_view like '%my_action.php%'
       )

Answer 2

也許你想要這個？

select * from test where  
(( action like 'my_action.php' or 
   action_edit like '%my_action.php%' or 
   action_view like '%my_action.php%'
 ) AND parent_id !=0)
OR 
( action='home.php' OR 
  action_view='home.php' OR 
  action_edit='home.php') 
ORDER BY `controller` ASC

Answer 3

嘗試這個：

SELECT * FROM test
  WHERE NOT EXISTS ((SELECT A.* FROM test A)
                   JOIN (SELECT B.* FROM test B WHERE 
                         B.action like 'my_action.php'
                         OR B.action_edit like '%my_action.php%'
                         OR B.action_view like '%my_action.php%')
                   ON A.parent_id !=0)
ORDER BY `controller` ASC

Answer 4

嗨最后我有一個解決方案

select * from test where  
( action like 'my_action.php' or 
action_edit like '%my_action.php%' or 
action_view like '%my_action.php%'
) AND parent_id !=0 ORDER BY `controller` ASC 

代替parent_id !=0我用了

和IF(action='home.php' OR action_view='home.php' OR action_edit='home.php',parent=0,parent!=0)

現在它正在工作，謝謝您的幫助：）。 我發布了我的答案，因為我認為這將為以后遇到類似問題的用戶提供幫助:)

Answer 5

怎么樣 ：

select * from test where  
(( action like 'my_action.php' or 
action_edit like '%my_action.php%' or 
action_view like '%my_action.php%'
)) AND (parent_id !=0)) 
ORDER BY `controller` ASC