Question

我正在使用SQL Sever2012。我有下表：

print(" after coalisce getting nb partition " + str(df.rdd.getNumPartitions()))

我要在其中将行旋转到列，将列标题旋转到行。我要结束的表如下所示：

CREATE TABLE #temptable
(
TimePeriod VARCHAR (50)
, Transactions INT
, SalesAmount DECIMAL (18, 2)
, NoEmployees INT
, Items INT
, Returns INT
)

INSERT INTO #temptable
VALUES
    ('ThisMonth', 5000, 2343423.41, 230, 1000, 200)
  , ('LastMonth', 6000, 433245.50, 232, 1020, 109)
  , ('ThisYear', 50000, 1391468.43, 321, 14890, 564)
  , ('LastYear', 60000, 1699713.64, 311, 16123, 342)

SELECT  *
FROM    #temptable

我尝试了一个起点：

SELECT 'Transactions' Metric, 5000 ThisMonth,   6000    LastMonth, 50000 ThisYear,  60000 LastYear UNION
SELECT 'SalesAmount' Metric,    2343423.41, 433245.5,   1391468.43  ,1699713.64 UNION
SELECT 'NoEmployees' Metric,    230,    232 ,321    ,311 UNION 
SELECT 'Items'  Metric, 1000,   1020,   14890,  16123 UNION
SELECT 'Returns' Metric,    200 ,109    ,564    ,342

Answer 1

如果您取消旋转，则再次旋转即可达到结果：

with cte as (
        /* this is the equivalent of an "unpivot" but using cross apply instead */
        select
            ca.*
        from #temptable
        cross apply (
            values
               (TimePeriod, 'Transactions', Transactions)
             , (TimePeriod, 'SalesAmount', SalesAmount)
             , (TimePeriod, 'NoEmployees', NoEmployees)
             , (TimePeriod, 'Items', Items)
             , (TimePeriod, 'Returns', Returns)
          ) ca (hdg, metric, val)
        )
SELECT metric,  [ThisMonth],[LastMonth], [ThisYear], [LastYear]
FROM cte
pivot (
        max([val])
        FOR [hdg] IN ([ThisMonth],[LastMonth], [ThisYear], [LastYear])
      ) p      
;

结果：

          metric      ThisMonth    LastMonth    ThisYear     LastYear   
 ---- -------------- ------------ ----------- ------------ ------------ 
   1   Items             1000,00     1020,00     14890,00     16123,00  
   2   NoEmployees        230,00      232,00       321,00       311,00  
   3   Returns            200,00      109,00       564,00       342,00  
   4   SalesAmount    2343423,41   433245,50   1391468,43   1699713,64  
   5   Transactions      5000,00     6000,00     50000,00     60000,00

请参阅：https://rextester.com/EIXT79068

OR，使用蛮力：

SELECT 
      'Items' as Metric
    , max(case when TimePeriod = 'ThisMonth' then Items end) ThisMonth
    , max(case when TimePeriod = 'LastMonth' then Items end) LastMonth
    , max(case when TimePeriod = 'ThisYear'  then Items end) ThisYear
    , max(case when TimePeriod = 'LastYear'  then Items end) LastYear
FROM    #temptable
union all
SELECT 
      'NoEmployees' as Metric
    , max(case when TimePeriod = 'ThisMonth' then NoEmployees end) ThisMonth
    , max(case when TimePeriod = 'LastMonth' then NoEmployees end) LastMonth
    , max(case when TimePeriod = 'ThisYear'  then NoEmployees end) ThisYear
    , max(case when TimePeriod = 'LastYear'  then NoEmployees end) LastYear
FROM    #temptable
union all
SELECT 
      'Returns' as Metric
    , max(case when TimePeriod = 'ThisMonth' then Returns end) ThisMonth
    , max(case when TimePeriod = 'LastMonth' then Returns end) LastMonth
    , max(case when TimePeriod = 'ThisYear'  then Returns end) ThisYear
    , max(case when TimePeriod = 'LastYear'  then Returns end) LastYear
FROM    #temptable
union all
SELECT 
      'SalesAmount' as Metric
    , max(case when TimePeriod = 'ThisMonth' then SalesAmount end) ThisMonth
    , max(case when TimePeriod = 'LastMonth' then SalesAmount end) LastMonth
    , max(case when TimePeriod = 'ThisYear'  then SalesAmount end) ThisYear
    , max(case when TimePeriod = 'LastYear'  then SalesAmount end) LastYear
FROM    #temptable
union all
SELECT 
      'Transactions' as Metric
    , max(case when TimePeriod = 'ThisMonth' then transactions end) ThisMonth
    , max(case when TimePeriod = 'LastMonth' then transactions end) LastMonth
    , max(case when TimePeriod = 'ThisYear'  then transactions end) ThisYear
    , max(case when TimePeriod = 'LastYear'  then transactions end) LastYear
FROM    #temptable
;

我的猜测是，在更改用于#temptable的查询时，这可能会使整个操作变得容易得多

在SQL Server中将行旋转到列和将列旋转到行

1 个答案: