如何只從SQL Server中檢索整數值

Question

如何從此列中檢索整數值？

我的表：

CREATE TABLE tbl_data (
    [Name] nvarchar(max) 
) 

INSERT INTO tbl_data VALUES 
('Nikesh'), 
('113'), 
('sunam'), 
('sudhir'), 
('2.30'), 
('ankit'), 
('675') 

輸出我需要：

Name 
----- 
113 
675 

Answer 1

您可以使用IsNumeric函數。

欲瞭解更多信息，請訪問：https://msdn.microsoft.com/en-us/library/ms186272.aspx

：資源下載有一個例子：

USE master; 
GO 
SELECT name, isnumeric(name) AS IsNameANumber, database_id, isnumeric(database_id) AS IsIdANumber 
FROM sys.databases; 
GO 

但請記住，你的設計看起來並不好。您應該只爲每列存儲一種數據類型。

感謝

Answer 2

Select name from tbl_data where Isnumeric(name) = 1 and name not like '%.%' 

Answer 3

您可以使用XML.value：

;WITH tbl_data AS (
SELECT * 
FROM (VALUES 
('Nikesh'), 
('113'), 
('sunam'), 
('sudhir'), 
('2.30'), 
('ankit'), 
('675') 
) as t([Name]) 
) 

SELECT * 
FROM tbl_data 
WHERE CAST([Name] as xml).value('. cast as xs:integer?','int') IS NOT NULL 

輸出：

Name 
113 
675 

Answer 4

以兩個最upvoted answer on the duplicate target，並從代碼刪除.，加上評論答案爲Why are non-digits LIKE [0-9]?，準確答案呃關於整數這個問題是這樣的：

SELECT Name 
FROM tbl_data 
WHERE Name NOT LIKE '%[^]%' COLLATE Latin1_General_CS_AS