在SQL语句中，与X BETWEEN 20 AND 30等价的表达式是
A.X>20 AND X<30 B.X>=20 AND X<=30 C.X>20 AND X<=30 D.X>=20 AND X<30正确答案B
在SQL语句中，与X BETWEEN 20 AND 30等价的表达式是
A.X>20 AND X<30 B.X>=20 AND X<=30 C.X>20 AND X<=30 D.X>=20 AND X<30正确答案B
