sql付款

⑴ 用SQL语句该怎么写： 满足a且满足b； 满足a且不满足b 这是两个语句，请问该怎么用SQL语句写出来呢

满足森悄a且满足b：
strSQL = "Select * From 数据表名 Where a = '首段a满足的条件' And b = '此芹渣b满足的条件'"
满足a且不满足b ：
strSQL = "Select * From 数据表名 Where a = 'a满足的条件' And b <> 'b满足的条件'"