行与列之间基于日期的HiveQL差异_Hive_Hiveql

行与列之间基于日期的HiveQL差异

hive

行与列之间基于日期的HiveQL差异,hive,hiveql,Hive,Hiveql,我有一个表（t_stocks），其中包含如下数据： exchanged,stock_symbol,closing_date,closing_price NSE,TCS,2009-08-09,2200.1 NSE,TCS,2009-08-10,2300.1 NSE,TCS,2009-08-11,12200.1 NSE,TCS,2009-08-12,22300.1 NSE,TCS,2009-09-09,2200.1 NSE,TCS,2009-09-10,2300.1 NSE,TCS,2009-09-

我有一个表（t_stocks），其中包含如下数据：

exchanged,stock_symbol,closing_date,closing_price
NSE,TCS,2009-08-09,2200.1
NSE,TCS,2009-08-10,2300.1
NSE,TCS,2009-08-11,12200.1
NSE,TCS,2009-08-12,22300.1
NSE,TCS,2009-09-09,2200.1
NSE,TCS,2009-09-10,2300.1
NSE,TCS,2009-09-11,12200.1
NSE,TCS,2009-09-12,22300.1
NSE,INFY,2009-08-09,2500.34
NSE,INFY,2009-08-10,1500.34
NSE,INFY,2009-08-09,7500.34
NSE,INFY,2009-08-10,14500.34
NSE,INFY,2009-09-09,2500.34
NSE,INFY,2009-09-10,1500.34
NSE,INFY,2009-09-09,7500.34
NSE,INFY,2009-09-10,14500.34
NSE,TCS,2010-08-09,2200.1
NSE,TCS,2010-08-10,2300.1
NSE,TCS,2010-08-11,12200.1
NSE,TCS,2010-08-12,22300.1
NSE,TCS,2010-09-09,2200.1
NSE,TCS,2010-09-10,2300.1
NSE,TCS,2010-09-11,12200.1
NSE,TCS,2010-09-12,22300.1
NSE,INFY,2010-08-09,2500.34
NSE,INFY,2010-08-10,1500.34
NSE,INFY,2010-08-09,7500.34
NSE,INFY,2010-08-10,14500.34
NSE,INFY,2010-09-09,2500.34
NSE,INFY,2010-09-10,1500.34
NSE,INFY,2010-09-09,7500.34
NSE,INFY,2010-09-10,14500.34
...
...

+----------------+-------------------+-------------------+--------------------+------------------------+-----------------------+--+
| exchanged      |     stock_symbol  |     closing_date  |     closing_price  |     yesterday_closing  | diff_yesterday_price  |
+----------------+-------------------+-------------------+--------------------+------------------------+-----------------------+--+
| NSE            | INFY              | 2009-08-09        | 2500.34            | NULL                   | NULL                  |
| NSE            | INFY              | 2009-08-09        | 7500.34            | 2500.34                | -5000                 |
| NSE            | INFY              | 2009-08-10        | 14500.34           | 7500.34                | -7000                 |
| NSE            | INFY              | 2009-08-10        | 1500.34            | 14500.34               | 13000                 |
| NSE            | INFY              | 2009-09-09        | 7500.34            | 1500.34                | -6000                 |
| NSE            | INFY              | 2009-09-09        | 2500.34            | 7500.34                | 5000                  |
| NSE            | INFY              | 2009-09-10        | 14500.34           | 1500.34                | -13000                |
| NSE            | INFY              | 2009-09-10        | 1500.34            | 2500.34                | 1000                  |
| NSE            | INFY              | 2010-08-09        | 7500.34            | 14500.34               | 7000                  |
| NSE            | INFY              | 2010-08-09        | 2500.34            | 7500.34                | 5000                  |
.....
.....

我需要编写一个查询，生成如下报告。已交换、股票符号、收盘日期、收盘价、昨日收盘价、差异昨日价（昨天价格和今天价格之间的差价）输出如下：

exchanged,stock_symbol,closing_date,closing_price
NSE,TCS,2009-08-09,2200.1
NSE,TCS,2009-08-10,2300.1
NSE,TCS,2009-08-11,12200.1
NSE,TCS,2009-08-12,22300.1
NSE,TCS,2009-09-09,2200.1
NSE,TCS,2009-09-10,2300.1
NSE,TCS,2009-09-11,12200.1
NSE,TCS,2009-09-12,22300.1
NSE,INFY,2009-08-09,2500.34
NSE,INFY,2009-08-10,1500.34
NSE,INFY,2009-08-09,7500.34
NSE,INFY,2009-08-10,14500.34
NSE,INFY,2009-09-09,2500.34
NSE,INFY,2009-09-10,1500.34
NSE,INFY,2009-09-09,7500.34
NSE,INFY,2009-09-10,14500.34
NSE,TCS,2010-08-09,2200.1
NSE,TCS,2010-08-10,2300.1
NSE,TCS,2010-08-11,12200.1
NSE,TCS,2010-08-12,22300.1
NSE,TCS,2010-09-09,2200.1
NSE,TCS,2010-09-10,2300.1
NSE,TCS,2010-09-11,12200.1
NSE,TCS,2010-09-12,22300.1
NSE,INFY,2010-08-09,2500.34
NSE,INFY,2010-08-10,1500.34
NSE,INFY,2010-08-09,7500.34
NSE,INFY,2010-08-10,14500.34
NSE,INFY,2010-09-09,2500.34
NSE,INFY,2010-09-10,1500.34
NSE,INFY,2010-09-09,7500.34
NSE,INFY,2010-09-10,14500.34
...
...

+----------------+-------------------+-------------------+--------------------+------------------------+-----------------------+--+
| exchanged      |     stock_symbol  |     closing_date  |     closing_price  |     yesterday_closing  | diff_yesterday_price  |
+----------------+-------------------+-------------------+--------------------+------------------------+-----------------------+--+
| NSE            | INFY              | 2009-08-09        | 2500.34            | NULL                   | NULL                  |
| NSE            | INFY              | 2009-08-09        | 7500.34            | 2500.34                | -5000                 |
| NSE            | INFY              | 2009-08-10        | 14500.34           | 7500.34                | -7000                 |
| NSE            | INFY              | 2009-08-10        | 1500.34            | 14500.34               | 13000                 |
| NSE            | INFY              | 2009-09-09        | 7500.34            | 1500.34                | -6000                 |
| NSE            | INFY              | 2009-09-09        | 2500.34            | 7500.34                | 5000                  |
| NSE            | INFY              | 2009-09-10        | 14500.34           | 1500.34                | -13000                |
| NSE            | INFY              | 2009-09-10        | 1500.34            | 2500.34                | 1000                  |
| NSE            | INFY              | 2010-08-09        | 7500.34            | 14500.34               | 7000                  |
| NSE            | INFY              | 2010-08-09        | 2500.34            | 7500.34                | 5000                  |
.....
.....

请任何人给我一些线索，以有效地做到这一点

提前感谢,

注意。

您可以使用配置单元窗口函数

lag（）

来解决此问题。您可以阅读有关配置单元中窗口函数的更多信息

下面是在

PostgreSQL

中使用的查询，但在

HIVE

中也可以使用相同的查询

select
 exchanged,
 stock_symbol,
 closing_date,
 closing_price,
 yesterday_price,
 (yesterday_price - closing_price) as diff_yesterday_price
from
(
    select
        *,
        lag(closing_price) over (partition by stock_symbol order by closing_date) as yesterday_price
    from stockExchange
) la

order by
    stock_symbol,
    closing_date

您可以使用配置单元窗口函数

lag（）

来解决此问题。您可以阅读有关配置单元中窗口函数的更多信息

下面是在

PostgreSQL

中使用的查询，但在

HIVE

中也可以使用相同的查询

select
 exchanged,
 stock_symbol,
 closing_date,
 closing_price,
 yesterday_price,
 (yesterday_price - closing_price) as diff_yesterday_price
from
(
    select
        *,
        lag(closing_price) over (partition by stock_symbol order by closing_date) as yesterday_price
    from stockExchange
) la

order by
    stock_symbol,
    closing_date