[英]Why ruby sort array of strings differently than sql order (postgres)?
[英]Sort an array of strings in SQL
我在 SQL Server 2019 中有一列要排序的字符串
Select * from ID
[7235, 6784]
[3235, 2334]
[9245, 2784]
[6235, 1284]
試圖得到以下結果:
[6784, 7235]
[2334, 3235]
[2784, 9245]
[1284, 6235]
鑒於此示例數據:
CREATE TABLE dbo.ID(ID int IDENTITY(1,1), SomeCol varchar(64));
INSERT dbo.ID(SomeCol) VALUES
('[7235, 6784]'),
('[3235, 2334]'),
('[9245, 2784]'),
('[6235, 1284]');
您可以運行此查詢:
;WITH cte AS
(
SELECT ID, SomeCol,
i = TRY_CONVERT(int, value),
s = LTRIM(value)
FROM dbo.ID CROSS APPLY
STRING_SPLIT(PARSENAME(SomeCol, 1), ',') AS s
)
SELECT ID, SomeCol,
Result = QUOTENAME(STRING_AGG(s, ', ')
WITHIN GROUP (ORDER BY i))
FROM cte
GROUP BY ID, SomeCol
ORDER BY ID;
Output:
ID | 一些科爾 | 結果 |
---|---|---|
1 | [7235, 6784] | [6784, 7235] |
2 | [3235, 2334] | [2334, 3235] |
3 | [9245, 2784] | [2784, 9245] |
4 | [6235, 1284] | [1284, 6235] |
源表有一列包含 JSON 數組。
這就是為什么通過 SQL 服務器 JSON API 處理它是一個完美的案例。
SQL
-- DDL and sample data population, start
DECLARE @tbl TABLE (ID int IDENTITY PRIMARY KEY, jArray NVARCHAR(100));
INSERT @tbl (jArray) VALUES
('[7235, 6784]'),
('[3235, 2334]'),
('[9245, 2784]'),
('[6235, 1284]');
-- DDL and sample data population, end
SELECT t.*
, Result = QUOTENAME(STRING_AGG(j.value, ', ')
WITHIN GROUP (ORDER BY j.value ASC))
FROM @tbl AS t
CROSS APPLY OPENJSON(t.jArray) AS j
GROUP BY t.ID, t.jArray
ORDER BY t.ID;
Output
+----+--------------+--------------+
| ID | jArray | Result |
+----+--------------+--------------+
| 1 | [7235, 6784] | [6784, 7235] |
| 2 | [3235, 2334] | [2334, 3235] |
| 3 | [9245, 2784] | [2784, 9245] |
| 4 | [6235, 1284] | [1284, 6235] |
+----+--------------+--------------+
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