如何在MySQL过程中动态添加where条件子句

Question

where  

  b.deviceId=device_id_U 

  and( 
  CONCAT('%',COALESCE(device_id_U,''),'%') and
   b.searchTerm like
   CONCAT('%',COALESCE(search_term,''),'%') and  
   b.deviceName like
  CONCAT('%',COALESCE(device_name,''),'%') and
   b.deviceNumber    like
  CONCAT('%',COALESCE(device_Number,''),'%') and
  b.os like 
  CONCAT('%',COALESCE(device_os,''),'%') and
  b.deviceWorkingStatus like
  CONCAT('%',COALESCE(device_workingstatus_U,''),'%') and
  b.status like
  CONCAT('%',COALESCE(device_status_U,''),'%') )   

 ;
 end if;

END

This is my Procedure i want when i pass device_id null then it should ignore where condition with device id and if give device_id value then it should search device id wise please tell me how add dynamically where condition so that i can solve this issue i am facing problem to add where clause dynamically

Answer 1

您可以尝试使用@FDavidov的想法进行反转吗

where  b.deviceId= IFNULL(device_id_U , b.deviceId)