how to speed up trigger

Question

I have 800 records in a table, I used trigger to update more than 20 fields from 4 tables but very slow takes up to 25 sec to update changes, i know computed fields are faster but i cant use computed fields to get/ update fields data from another table. what other methods can i use?

below i tried to show is how i am trying to updating field

create  TRIGGER [dbo].[WO-WHLINFO] 
    ON [dbo].[WORKORDERS]
    AFTER  INSERT,UPDATE
    AS 
    BEGIN    IF TRIGGER_NESTLEVEL() > 1
     RETURN      UPDATE T1 
         SET  [C/S ANGLE2]=T2.[C/S ANGLE2], 
              [BH SIZE2]=T2.[BH SIZE2],
              [COLOR]=T2.[COLOR], 
              [MRP Wheel]=T2.[STOCK NO],    
              [WO PN]=T2.[WHL-ASSY LOOKUP]

          FROM WORKORDERS T1 CROSS APPLY (SELECT TOP 1 *
             FROM [WHl] T2
             WHERE [WHEEL PN 1]=T2.[WHL-ASSY LOOKUP] OR 
                   [WHEEL PN 1-S]= T2.[STOCK NO]) T2
             END

what other options i can use to update field data from another table?

Answer 1

请尝试在表上创建索引，这可能会增加插入和删除的速度