如何只选择数值

Question

表格1

ID

01
wire
02
steve
ram123
03
....

从table1我想只选择数值,它不应该显示像(ram123)这样的字母数字值

预期产出

01
02
03
....

如何查询此条件

Answer 1

尝试 ISNUMERIC

SELECT *
FROM Table1
WHERE ISNUMERIC([ID]) = 1

SQLFiddle演示

Answer 2

SELECT * FROM @Table 
WHERE Col NOT LIKE '%[^0-9]%'