如下两表: table1                              table2
--------------------                -----------------------
  id        name                       id           state
--------------------                -----------------------
   1        tom                         1           good
   2        jack
--------------------                ------------------------用“select * from table1,table2 where table1.id=table2.id”语句的返回结果如下:-----------------------------------
  id       name        state
-----------------------------------
  1         tom        good
-----------------------------------而我想返回:-----------------------------------
  id       name        state
-----------------------------------
  1        tom         good
  2        jack
-----------------------------------该怎么办呢?用什么语句?