是否有一个sql条件可以在列中查找非整数？

Question

基本上我想要一个像这样运行的select语句

SELECT *
FROM table  
WHERE column IS NOT INT  

是否有这样的条件或如何检查nvarchar(10)列中的非整数？

Answer 1

在SQL Server你可以做:

SELECT  *
FROM    mytable  
WHERE   CASE WHEN IsNumeric(mycolumn) = 1 THEN CASE WHEN CAST(mycolumn AS FLOAT) <> CAST(CAST(mycolumn AS FLOAT) AS INT) THEN 1 END ELSE 1 END = 1

Answer 2

你也可以用

SELECT  *
FROM    T 
WHERE  C = ''
        OR C LIKE '%[^0-9-]%' /*Contains a char other than - or 0-9*/
        OR C LIKE '_%-%'  /*Contains the - char other than 1st position*/