How to only select numeric data from mysql?

Question

Does mysql have a function like is_num() which can allow me determine the data is numeric or not?

Answer 1

In my case I just needed to check if data was >= 0 and not char, perhaps this is useful for you also:

mysql> select '1'  REGEXP '^[0-9]+$' as result;
+--------+
| result |
+--------+
|      1 | 
+--------+
1 row in set (0.16 sec)

mysql> select '1a'  REGEXP '^[0-9]+$' as result;
+--------+
| result |
+--------+
|      0 | 
+--------+