I don't know how to find .exe with numbers in MYSQL - mysql

Question

For example, I would like to find an 'exe' with a fixed path: \Temp\3038.exe
The number before '.exe' is fixed to 4 digits, but the value is random(0001 ~ 9999).
Only numbers are changed to 4 random digits.
I'd really appreciate it if you could tell me what to do.
I tried 2ways:
SELECT * FROM myTable WHERE path REGEXP '\\Temp\\\d{4}.exe';
SELECT * FROM myTable WHERE path like '\\Temp\\\d{4}.exe';
my data:
C:\\Users\\AppData\\Local\\Temp\\1536.exe
C:\\Users\\AppData\\Local\\Temp\\6247.exe
C:\\Users\\AppData\\Local\\Temp\\2508.exe
.......(skip)
For these I need to get 1536, 6247, 2508

Answer 1

DBFIDDLE
A regular expression will bite, especially if it has a '` in it.
When you say the data is: C:\\Users\\AppData\\Local\\Temp\\2508.exe will it have one '` or two '' ? to be honest i got a but lost too 😉
The DBFIDDLE uses:
select *
from mytable
where path REGEXP '.*\\\\Temp\\\\\\d{4}.exe';
The REGEXP looks complicated, but let me try to explain, it matches
.* a dot is any character, and an asterix says that character(s) can be present 0 or more times.
\\ a backslash
\\ another backslash
'Temp' the four letters 'T','e','m' and 'p', in this order.
\\ another backslash
\\ another backslash
\d{4} the \d is representing a digit (which is a number between 0 and 9), and the '{4}' will match four of those.
. this is a random character
exe this is the three letters in 'exe'.
A bug in this is that this will also match: C:\\Users\\AppData\\Local\\Temp\\2508Xexe
But, I like to keep room for improvements 😉😁
P.S. When replacing the '.' by '.' it will match a dot literally, and not a random charachter.
EDIT: re-reading the question, I see that you only want the numbers.
From the results you can take LEFT(RIGHT(path,8),4)
This will first take the last 8 charachters (RIGHT(path,8)), and from that the first 4 characters. This should work because the matching regular expression result always end in 4 numbers with '.exe' after it.