是否有sql条件可以在列中查找非整数？

Question

基本上我想一个select语句，将功能类似这样

SELECT * 
FROM table 
WHERE column IS NOT INT 

有没有这样的条件或者你如何在一个nvarchar（10）列检查非整数？

Answer 1

在SQL Server你可以这样做：

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

你也可以使用

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*/