mysql 如何对同一张表的相似的查询结果进行合并（就是条件不同而已）？

Question

譬如
select count(*) from A where type = 'dog'

select count(*) from A where type = 'cat'

这两个怎么合并呢？

这里我只是举个例子
每个类型的结果我都是需要的，另外条件查询会更复杂的，可能还是 addtime > And addtime < **

Answer 1

直接用 UNION ALL 合并查询内容可否

SELECT count(*), 'dog' as type FROM A WHERE type='dog' 
UNION ALL
SELECT count(*), 'cat' as type FROM A WHERE type='cat' AND addtime > '2016-0-11-14'

Answer 2

type IN ('dog','cat')

Answer 3

select count(*) from A where (type = 'dog' or type = 'cat')