亚马逊雅典娜创建带有分区的请求

Question

我创建一个具有以下分区的表：首先按年，月和日。

问题：我希望获得12/2017和03/2018的数据，我该怎么做？ 我认为：

where (year='2017' and month='12') and ( year ='2018' and month='03')

这是正确的吗？ 我不会感到困惑，因此Amazon Athena可以获取以下数据：

12/2017 and 03/2018 and 03/2017 and 12/2018 

因为和运算符？

PS：我无法测试，我只有免费帐户。 谢谢。

Answer 1

无论如何，我尝试了一组小型数据，但我发现Amazon Athena考虑了括号。

我的测试如下：表的DDl已被分级：

CREATE EXTERNAL TABLE `manyands`(
  `years` int COMMENT 'from deserializer', 
  `months` int COMMENT 'from deserializer', 
  `days` int COMMENT 'from deserializer')
PARTITIONED BY ( 
  `year` string, 
  `month` string)
ROW FORMAT SERDE 
  'org.openx.data.jsonserde.JsonSerDe' 
STORED AS INPUTFORMAT 
  'org.apache.hadoop.mapred.TextInputFormat' 
OUTPUTFORMAT 
  'org.apache.hadoop.hive.ql.io.IgnoreKeyTextOutputFormat'
LOCATION
  's3://mybucket/'

我的一组数据测试：

我的测试：

1- SELECT * FROM "atlasdatabase"."manyands" where month='1'; 我有CSV格式：

"years","months","days","year","month"
"2017","1","21","2017","1"
"2018","1","81","2018","1"

2- SELECT * FROM "atlasdatabase"."manyands" where month='1' and year='2017';

"years","months","days","year","month"
"2017","1","21","2017","1"

3- SELECT * FROM "atlasdatabase"."manyands" where (month='1' and year='2018') and (month='3' and year='2017') ;

empty (Zéro enregistrements renvoyés)

4- SELECT * FROM "atlasdatabase"."manyands" where (month='1' and year='2018') or (month='3' ) ;

"years","months","days","year","month"
"2018","1","81","2018","1"
"2017","3","73","2017","3"
"2018","3","73","2018","3"

结论：在分区的许多实例之间添加OR运算符。