Regular expression for checking a field: a field must contain at least 2 alpha-numeric characters

Question

I need to check the VARCHAR field. conditions: the field must contain at least 2 alpha-numeric characters

therefore, please, any of them gives a regular expression for the above conditions

I wrote the expression below, but it will check at least 2 letters are alphanumeric. and if my input has a value other than alphanumeric, it is not checked.

'^ [A-Za-Z0-9] {2} $'

Please, help.........

Answer 1

[a-zA-Z0-9].*[a-zA-Z0-9]

Easy way: at least two alnum anywhere on the line.

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( ) . - , OP, , ([a-zA-Z0-9].*?[a-zA-Z0-9]) . , :)

Answer 2

:

[a-zA-Z0-9][^a-zA-Z0-9]*[a-zA-Z0-9]

Answer 3

-? US ASCII . .

[[:alnum:]].*[[:alnum:]]

[^\W_].*[^\W_]

, \w , . double-negative : "not not-a-word-character not underscore".

Answer 4

,

'\w.*\w'

Answer 5

[a-zA-Z0-9].*[a-zA-Z0-9] [a-zA-Z0-9].*?[a-zA-Z0-9].

- , , -, . . - , - ( , , , [a-zA-Z0-9], .).

( ):
, - , ( , Gumbo).
- , .

Test: http://jsbin.com/eletu/4
Compares 3 versions:

[a-zA-Z0-9].*?[a-zA-Z0-9]
[a-zA-Z0-9][^a-zA-Z0-9]*[a-zA-Z0-9]
[a-zA-Z0-9].*[a-zA-Z0-9]

Conclusion: no. As usual, you should check for typical data.