MySql數據庫字段排序規則不一致產生的一個問題

最近項目向MySql遷移，遷移完畢後，在獲取用戶權限時產生了一個異常，跟蹤進去獲取執行的語句以下，

 SELECT PermissionId   FROM spysxtPermission  WHERE (ResourceCategory = 'BaseUser'      
  AND ResourceId =  '003bf4bd072243fa90517ee2bc088cb7'       AND Enabled = 1        
 AND DeletionStateCode = 0)  UNION  SELECT PermissionId   FROM spysxtPermission        , ( SELECT RoleId   FROM spysxtUserRole 
 WHERE (UserId =  '003bf4bd072243fa90517ee2bc088cb7'        AND Enabled = 1         AND DeletionStateCode = 0 )  UNION SELECT RoleId   
FROM BaseUserRole  WHERE ( UserId =  '003bf4bd072243fa90517ee2bc088cb7'        AND Enabled = 1         AND DeletionStateCode = 0 ) ) B  
  WHERE ResourceCategory =  'spysxtRole'       
AND spysxtPermission.ResourceId = B.RoleId        AND spysxtPermission.Enabled = 1    
     AND spysxtPermission.DeletionStateCode = 0 

在Navicate執行，提示以下：

這個語句在Oracle中執行都是正常的，一時不知道是什麼緣由，baidu了也沒找到如何處理，我將語句逐個拆開執行，最終找到問題出在這裏：

 SELECT RoleId   FROM spysxtUserRole 
 WHERE (UserId =  '003bf4bd072243fa90517ee2bc088cb7' AND Enabled = 1 AND DeletionStateCode = 0 )  
 UNION SELECT RoleId   
FROM BaseUserRole  WHERE ( UserId =  '003bf4bd072243fa90517ee2bc088cb7' AND Enabled = 1 AND DeletionStateCode = 0 )

看到這裏，我忽然想到有多是字符集不同形成的，打開表

 

原來問題出在排序規則上，一個是utf8_unicode_ci，一個是utf8_danish_ci。所有改成utf8_unicode_ci。問題解決!

原覺得是代碼bug，一直在調試代碼，沒想到問題出在這裏。