如何从字符串中提取数字部分

Question

I have a column that has a string in it as follow

Data
black83736
white87
white893
pink82928
pink1
black27
...
...

I want to just get the digits out of that column.

Edit

I would prefer mysql solution

Answer 1

Try this mysql Solution : (updated)

SELECT replace(reverse(FORMAT(reverse(COLUMN_NAME), 0)), ',', '') as number from TABLE_NAME;

this is for your particular case, where you want the numbers in the end.

so first we

Reverse , so numbers come to beginning

format , so alphabets are removed, format is used for formatting a number with specified decimal places, here we specify it to 0.

reverse again -> to obtain the original number

replace ',' to '' -> to remove the effect of formatting of second step.

**

(UPDATE)

** the above solution doesnt work for numbers ending in 0's (thanks to karolis for telling)

so for that

SELECT replace(replace(reverse(FORMAT(reverse(concat(numbers, '9099')), 0)), ',', ''), '9099', '') as number from test1;

Here we are appending '9099' to the end of the number, and then removing 9099 in the end.

9099 ? just a number which would be highly in-probable to occur in your columns

Answer 2

$result = preg_replace('~[^0-9]*~', '', $string);

Answer 3

Yes, it's very inelegant, but currently the only reliable MySQL only solution that I know:

select replace(column_name,
    replace(replace(replace(replace(replace(
    replace(replace(replace(replace(replace(
    column_name, 
    0, ''), 1, ''), 2, ''), 3, ''), 4, ''), 
    5, ''), 6, ''), 7, ''), 8, ''), 9, ''), '')

Answer 4

filter_var('stri99ng', FILTER_SANITIZE_NUMBER_INT);

I would prefer mysql solution

Well, you shouldn't unless you have powerful processor or this query does not return many results. MySQL isn't generally good for any string manipulation operations.