Question

我有3个表，两个表有日期列，一个只显示日，

第一个表 - 第一个表用于设置当天交付的状态..

code    status  date
------  ------  ------
JHB        v    2017-12-26
JHB        v    2017-12-27
JHB        v    2017-12-28
JHB        v    2017-12-31
PEN        v    2017-12-26
PEN        v    2017-12-27
PEN        v    2017-12-28
PEN        v    2017-12-29

第二个表适用于每个代码公共假期

code    P.H         date
------  ------      ------
JHB     Chrismas    2017-12-25
PEN     Chrismas    2017-12-25

，第三个表是每个代码周末假期

code    Holiday         
------  ------  
JHB     Friday
JHB     Saturday    
PEN     Saturday
PEN     Sunday

所以如何生成如下表格。

day      JHB    PEN
------  ------  ------
25       P.H    P.H
26        v      v
27        v      v
28        v      v
29        H      v
30        H      H
31        v      H

日安排日期为12月25日至12月31日

v - 已交付状态 H-假期 P.H - 公众假期

Answer 1

我使用递归CTE为列创建动态SQL查询。另外，我使用递归CTE来计算日期范围。为了最终结果，我加入了公共假期和状态表，并按日期分组。希望它有所帮助!!

Demo

EXEC(
'
-- Dynamic SQL to dynamically add the columns based on code
DECLARE @DynamicSQL VARCHAR(MAX);
DECLARE @FORMAT VARCHAR(100)= ''MAX(CASE WHEN src.code = ''''?'''' THEN COALESCE(src.status, ''''H'''') ELSE ''''H'''' END) AS ''''?'''''';
-- Populate Dynamic SQL
;WITH SDTable AS (
    SELECT ''JHB'' AS code, ''v'' AS status, CAST(''2017-12-26'' AS DATE) AS date UNION ALL
    SELECT ''JHB'', ''v'', CAST(''2017-12-27'' AS DATE) UNION ALL
    SELECT ''JHB'', ''v'', CAST(''2017-12-28'' AS DATE) UNION ALL
    SELECT ''JHB'', ''v'', CAST(''2017-12-31'' AS DATE) UNION ALL
    SELECT ''PEN'', ''v'', CAST(''2017-12-26'' AS DATE) UNION ALL
    SELECT ''PEN'', ''v'', CAST(''2017-12-27'' AS DATE) UNION ALL
    SELECT ''PEN'', ''v'', CAST(''2017-12-28'' AS DATE) UNION ALL
    SELECT ''PEN'', ''v'', CAST(''2017-12-29'' AS DATE)
),
PHTable AS (
    SELECT ''JHB'' AS code, ''Chrismas'' AS ''P.H'', CAST(''2017-12-25'' AS DATE) AS date UNION ALL
    SELECT ''PEN'', ''Chrismas'', CAST(''2017-12-25'' AS DATE)
),
WeekendTable AS (
    SELECT ''JHB'' AS code, ''Friday'' AS Holiday UNION ALL
    SELECT ''JHB'', ''Saturday'' UNION ALL
    SELECT ''PEN'', ''Saturday'' UNION ALL
    SELECT ''PEN'', ''Sunday''
),
DistinctCodeTable AS(
SELECT DISTINCT code FROM (SELECT code AS code FROM WeekendTable UNION ALL SELECT code AS code FROM PHTable UNION ALL SELECT code AS code FROM SDTable) codeTable
)
SELECT @DynamicSQL = 
    STUFF(( SELECT '','' + REPLACE(@FORMAT, ''?'', code) 
              FROM DistinctCodeTable
              FOR XML PATH('''')),1,1,'''');

-- Execute Main query with dynamic columns
EXEC(
-- Define Range
''DECLARE @D1 DATE = ''''2017-12-25'''';
DECLARE @D2 DATE = ''''2017-12-31'''';

;WITH SDTable AS (
    SELECT ''''JHB'''' AS code, ''''v'''' AS status, CAST(''''2017-12-26'''' AS DATE) AS date UNION ALL
    SELECT ''''JHB'''', ''''v'''', CAST(''''2017-12-27'''' AS DATE) UNION ALL
    SELECT ''''JHB'''', ''''v'''', CAST(''''2017-12-28'''' AS DATE) UNION ALL
    SELECT ''''JHB'''', ''''v'''', CAST(''''2017-12-31'''' AS DATE) UNION ALL
    SELECT ''''PEN'''', ''''v'''', CAST(''''2017-12-26'''' AS DATE) UNION ALL
    SELECT ''''PEN'''', ''''v'''', CAST(''''2017-12-27'''' AS DATE) UNION ALL
    SELECT ''''PEN'''', ''''v'''', CAST(''''2017-12-28'''' AS DATE) UNION ALL
    SELECT ''''PEN'''', ''''v'''', CAST(''''2017-12-29'''' AS DATE)
),
PHTable AS (
    SELECT ''''JHB'''' AS code, ''''Chrismas'''' AS ''''P.H'''', CAST(''''2017-12-25'''' AS DATE) AS date UNION ALL
    SELECT ''''PEN'''', ''''Chrismas'''', CAST(''''2017-12-25'''' AS DATE)
),
WeekendTable AS (
    SELECT ''''JHB'''' AS code, ''''Friday'''' AS Holiday UNION ALL
    SELECT ''''JHB'''', ''''Saturday'''' UNION ALL
    SELECT ''''PEN'''', ''''Saturday'''' UNION ALL
    SELECT ''''PEN'''', ''''Sunday''''
),
DistinctCodeTable AS(
SELECT DISTINCT code FROM (SELECT code AS code FROM WeekendTable UNION ALL SELECT code AS code FROM PHTable UNION ALL SELECT code AS code FROM SDTable) codeTable
),
L0 AS (SELECT 1 AS c UNION ALL SELECT 1),
L1 AS (SELECT 1 AS c FROM L0 A CROSS JOIN L0 B),
L2 AS (SELECT 1 AS c FROM L1 A CROSS JOIN L1 B),
L3 AS (SELECT 1 AS c FROM L2 A CROSS JOIN L2 B),
L4 AS (SELECT 1 AS c FROM L3 A CROSS JOIN L3 B),
Nums AS (SELECT ROW_NUMBER() OVER (ORDER BY (SELECT 0)) AS i FROM L4)
SELECT 
src.day AS day,'' 
+ @DynamicSQL +
''
FROM 
(
-- Select Public holiday as well as status table
SELECT
 CASE WHEN ph.[P.H] IS NOT NULL THEN ph.code ELSE sd.code END AS code,
 CASE WHEN ph.[P.H] IS NOT NULL THEN ''''P.H'''' ELSE CASE WHEN sd.status IS NOT NULL THEN sd.status ELSE ''''H'''' END
 END AS status,
 DATEPART(DAY, DATEADD(day,i-1,@D1)) AS day
 FROM Nums n
 LEFT JOIN SDTable sd ON sd.date = DATEADD(day,n.i-1,@D1)
 LEFT JOIN PHTable ph ON ph.date = DATEADD(day,n.i-1,@D1)
WHERE i <= 1+DATEDIFF(day,@D1,@D2)
) src
GROUP BY src.day;'')
');

输出

day      JHB    PEN
------  ------  ------
25       P.H    P.H
26        v      v
27        v      v
28        v      v
29        H      v
30        H      H
31        v      H

在一个表视图中加入3个具有日期值的表

1 个答案: