sql - 在同一个表上加入多个过滤的选择查询？

Question

我是一个完整的 sql noob，所以我为接下来的 sql 屠杀道歉......
这是我要执行的操作的伪代码:

count( 
   join( 
      select( * from table X where a='stuff' and b='junk' ) as X1
      select( * from table X where a='arg' and b='blarg' ) as X2
      select( * from table X where a='narf' and b='foo' ) as X3
   ) where X1.c = X2.c = X3.c
)

是否可以在一次查询中获得此结果？

Answer 1

select count(*) from 

(select * from table X where a='stuff' and b='junk') x1

join

(select * from table X where a='arg' and b='blarg' ) x2

on x1.c=x2.c

join

( select * from table X where a='narf' and b='foo' ) X3

on x2.c=x3.c