查询订购单号（字符型，长度为4）尾字符是"1" 的错误命令是
A.SELECT * FROM 订单 WHERE SUBSTR(订购单号,4)=
B.SELECT * FROM 订单 WHERE SUBS TR(订购单号,4,1)=
C.SELECT * FROM 订单 WHERE
D.SELECT * FROM 订单 WHERE RIGH T(订购单号,1)=