数据统计--union all 执行多条sql

需求--统计hive某张表type字段不同取值的数据量

我们已知某张表的type的取值是1，2，3，4，5，想要统计不同type的数据量，并清晰的展现出来。可以通过union all 的方式，sql如下：

SELECT "",COUNT(*) FROM table_name WHERE type = ""
UNION ALL
SELECT "",COUNT(*) FROM table_name WHERE type = ""
UNION ALL
SELECT "",COUNT(*) FROM table_name WHERE type = ""
UNION ALL
SELECT "",COUNT(*) FROM table_name WHERE type = ""
UNION ALL
SELECT "",COUNT(*) FROM table_name WHERE type = ""

得到的结果如下：

type	count(*)
1	324
2	123
3	345
4	156
5	343