这是一个有助于澄清我的问题的转贴。我正在处理时间序列数据,我需要参考前一年的数据。在excel中,我只使用vlookup或索引匹配。
这是我的表
+------------+--------------+--------------+------+-------+
| date | unique_id | prev_year_id | id | value |
+------------+--------------+--------------+------+-------+
| 2016-01-01 | 1-2016-01-01 | 1-2015-01-01 | 1 | 7 |
| 2016-01-01 | 2-2016-01-01 | 2-2015-01-01 | 2 | 19 |
| 2016-01-01 | 3-2016-01-01 | 3-2015-01-01 | 3 | 6 |
| 2016-01-01 | 4-2016-01-01 | 4-2015-01-01 | 4 | 13 |
| 2016-01-01 | 5-2016-01-01 | 5-2015-01-01 | 5 | 5 |
| 2017-01-01 | 1-2017-01-01 | 1-2016-01-01 | 1 | 17 |
| 2017-01-01 | 2-2017-01-01 | 2-2016-01-01 | 2 | 8 |
| 2017-01-01 | 3-2017-01-01 | 3-2016-01-01 | 3 | 20 |
| 2017-01-01 | 4-2017-01-01 | 4-2016-01-01 | 4 | 3 |
| 2017-01-01 | 5-2017-01-01 | 5-2016-01-01 | 5 | 0 |
| 2018-01-01 | 1-2018-01-01 | 1-2017-01-01 | 1 | 4 |
| 2018-01-01 | 2-2018-01-01 | 2-2017-01-01 | 2 | 21 |
| 2018-01-01 | 3-2018-01-01 | 3-2017-01-01 | 3 | 7 |
| 2018-01-01 | 4-2018-01-01 | 4-2017-01-01 | 4 | 3 |
| 2018-01-01 | 5-2018-01-01 | 5-2017-01-01 | 5 | 6 |
+------------+--------------+--------------+------+-------+
我的专栏是:
日期下, unique_id (这是id和date的连接在一起;主键), prev_year_id (id和日期的连续 - 间隔1年), 的 ID 下, 的值
我需要帮助创建一个语句以匹配prev_year_id和unique_id并返回行的值。
由于没有任何数据可供参考,第一年会有差距,但在第一年之后,每个prev_year_value将与之前一年的unique_id匹配
这就是我想象的最终结果:
+------------+--------------+--------------+------+-------+-----------------+
| date | unique_id | prev_year_id | id | value | prev_year_value |
+------------+--------------+--------------+------+-------+-----------------+
| 2016-01-01 | 1-2016-01-01 | 1-2015-01-01 | 1 | 7 | null |
| 2016-01-01 | 2-2016-01-01 | 2-2015-01-01 | 2 | 19 | null |
| 2016-01-01 | 3-2016-01-01 | 3-2015-01-01 | 3 | 6 | null |
| 2016-01-01 | 4-2016-01-01 | 4-2015-01-01 | 4 | 13 | null |
| 2016-01-01 | 5-2016-01-01 | 5-2015-01-01 | 5 | 5 | null |
| 2016-01-01 | 1-2017-01-01 | 1-2016-01-01 | 1 | 17 | 7 |
| 2016-01-01 | 2-2017-01-01 | 2-2016-01-01 | 2 | 8 | 19 |
| 2016-01-01 | 3-2017-01-01 | 3-2016-01-01 | 3 | 20 | 6 |
| 2016-01-01 | 4-2017-01-01 | 4-2016-01-01 | 4 | 3 | 13 |
| 2016-01-01 | 5-2017-01-01 | 5-2016-01-01 | 5 | 0 | 5 |
| 2016-01-01 | 1-2018-01-01 | 1-2017-01-01 | 1 | 4 | 17 |
| 2016-01-01 | 2-2018-01-01 | 2-2017-01-01 | 2 | 21 | 8 |
| 2016-01-01 | 3-2018-01-01 | 3-2017-01-01 | 3 | 7 | 20 |
| 2016-01-01 | 4-2018-01-01 | 4-2017-01-01 | 4 | 3 | 3 |
| 2016-01-01 | 5-2018-01-01 | 5-2017-01-01 | 5 | 6 | 0 |
+------------+--------------+--------------+------+-------+-----------------+
这是我的陈述..
SELECT A.*, B.value as 'prev_year_value'
FROM table1 A
INNER JOIN table1 B ON A.current_month_code = B.`prev_year_code
结果返回非常慢,它返回的是下一年的价值,而不是前一年的价值。
答案 0 :(得分:0)
ActiveWorkbook.Queries.Add Name:="NameOfTheFile", Formula:= "let" & Chr(13) & "" & Chr(10) & _
" Quelle = Csv.Document(File.Contents(""C:\Users\USERNAME\Desktop\censored\NameOfTheFile.csv""),[Delimiter="";"", Columns=18, Encoding=1252, QuoteStyle=QuoteStyle.None])," & Chr(13) & "" & Chr(10) & _
" #""Geänderter Typ"" = Table.TransformColumnTypes(Quelle,{{""Column1"", type text},{""Column2"", type text}, {""Column3"", type text}, {""Column4"", type text},{""Column5"", type text}, {""Column6"", type text}, {""Column7"", type text},{""Column8"", type text}, {""Column9"", type text}, {""Column10"", type text},{""Column11"", type text}, {""Column12"", type text}, {""Column13"", type text},{""Column14"", type text}, {""Column15"", type text}, {""Column16"", type text}, {""Column17"", type text},{""Column18"", type text}})" & Chr(13) & "" & Chr(10) & _
"in" & Chr(13) & "" & Chr(10) & " #""Geänderter Typ"""
由于这是左连接,如果“ON”语句没有结果,结果仍将包含SELECT a.*, b.`value` as `prev_year_value`
FROM `table1` a
LEFT JOIN `table1` b
ON a.`prev_year_id` = b.`unique_id`
的值,而a
最终将为null,如你想要的。
在你尝试过的内连接中,它只包含结果,两个表中都有匹配