Mysql current date trigger -

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I have the following triggers 

  create triggers `` qc_date_trigger` after updating ` Reserve for each line on the brand 'if new. Brands QC = '1' then set @ brandxDATE = kurt (); ELSE SET @brandQCDate = NULL; end if; END   
 For some reason this does not update my date field in the current date when QC = 1. I have checked the mysql doctor and it should work. Any ideology?  
  
 
 
 If your column is named brandQCDate, remove  @  Please give it.  @  creates a user-defined variable, not a column, besides this you want to do this before a  UPDATE  trigger. Update the 'brand' for each line before updating to the  
  create trigger 'brand` if the new one is new. Brands QC = 1 'then set NEW.brandQCDate = CURDATE (); ELSE SET NEW.brandQCDate = NULL; end if; END

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