[英]Add new column to temp table based on values from a column
我想從下表創建一個臨時表。
------------------------|--------
Date | Length
------------------------|--------
2014-08-28 00:00:00.000 | 1.5
2014-08-28 00:00:00.000 | 2.6
2014-08-28 00:00:00.000 | 1.5
2014-08-28 00:00:00.000 | 3.3
2014-08-28 00:00:00.000 | 1.1
2014-08-28 00:00:00.000 | 8.5
2014-08-28 00:00:00.000 | 8.6
2014-08-28 00:00:00.000 | 11.3
並讓臨時表如下所示。
Date | Length | Length_Range
------------------------|---------|--------------
2014-08-28 00:00:00.000 | 1.5 | 1-4
2014-08-28 00:00:00.000 | 2.6 | 1-4
2014-08-28 00:00:00.000 | 6.5 | 5-10
2014-08-28 00:00:00.000 | 3.3 | 1-4
2014-08-28 00:00:00.000 | 1.1 | 1-4
2014-08-28 00:00:00.000 | 8.5 | 5-10
2014-08-28 00:00:00.000 | 8.6 | 5-10
2014-08-28 00:00:00.000 | 11.3 | 11-15
我希望能夠定義[Length_Range]。
Microsoft SQL Server2016。兼容性級別:SQL Server 2005(90)
用case
:
select t.*,
(case when length >= 1 and length < 4 then '1-4'
when length < 10 then '5-10'
when length < 15 then '11-15'
else '16+'
end) as length_range
into #temp_t
from t;
CREATE TABLE #TABLE1
([DATE] DATETIME, [LENGTH] FLOAT)
INSERT INTO #TABLE1
([DATE], [LENGTH])
VALUES
('2014-08-28 00:00:00', 1.5),
('2014-08-28 00:00:00', 2.6),
('2014-08-28 00:00:00', 1.5),
('2014-08-28 00:00:00', 3.3),
('2014-08-28 00:00:00', 1.1),
('2014-08-28 00:00:00', 8.5),
('2014-08-28 00:00:00', 8.6),
('2014-08-28 00:00:00', 1.3)
SELECT *,CASE
WHEN LENGTH BETWEEN 1 AND 4 THEN '1-4'
WHEN LENGTH BETWEEN 5 AND 10 THEN '5-10'
WHEN LENGTH BETWEEN 11 AND 15 THEN '11-15' END AS LENGHT_RANGE
FROM #TABLE1
輸出值
Date Length LENGHT_RANGE
2014-08-28 00:00:00.000 1.5 1-4
2014-08-28 00:00:00.000 2.6 1-4
2014-08-28 00:00:00.000 1.5 1-4
2014-08-28 00:00:00.000 3.3 1-4
2014-08-28 00:00:00.000 1.1 1-4
2014-08-28 00:00:00.000 8.5 5-10
2014-08-28 00:00:00.000 8.6 5-10
2014-08-28 00:00:00.000 1.3 1-4
您可以使用“創建表...作為選擇...”語法
CREATE TABLE temp_table AS
SELECT [date], [length],
CASE
WHEN length BETWEEN 1 AND 4 THEN '1-4'
WHEN length BETWEEN 5 AND 10 THEN '5-10'
WHEN length BETWEEN 11 AND 15 THEN '11-15'
END AS LENGTH_RANGE
FROM orig_table
資料來源:
...
-可以幫助
;WITH cte (
[Date]
,[Length]
)
AS (
SELECT cast('2014-08-28 00:00:00.000' AS DATETIME)
,CAST('1.5' AS DECIMAL(4, 2))
UNION ALL
SELECT '2014-08-28 00:00:00.000'
,'2.6'
UNION ALL
SELECT '2014-08-28 00:00:00.000'
,'1.5'
UNION ALL
SELECT '2014-08-28 00:00:00.000'
,'3.3'
UNION ALL
SELECT '2014-08-28 00:00:00.000'
,'1.1'
UNION ALL
SELECT '2014-08-28 00:00:00.000'
,'8.5'
UNION ALL
SELECT '2014-08-28 00:00:00.000'
,'8.6'
UNION ALL
SELECT '2014-08-28 00:00:00.000'
,'11.3'
)
SELECT *
,CASE
WHEN Length < 1
THEN '< 1'
WHEN Length BETWEEN 1
AND 4
THEN '1-4'
WHEN Length BETWEEN 5
AND 10
THEN '5-10'
WHEN Length BETWEEN 11
AND 15
THEN '11-15'
WHEN Length > 15
THEN '> 15'
END AS Length_Range
FROM cte
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