如何优化这个 sql

Question

这是一个触发器:

create trigger tg1
after insert on table1
for each row
begin
update table2 set amount=if(isnull(amount),0,amount)+1 where t2_id=new.t1_id;
end;

如何优化：amount=if(isnull(amount),0,amount)+1

谢谢

Answer 1

干净多了:

amount=IFNULL(amount,0)+1

how to optimize this sql