Static Salt vs Random Salt - Security PHP

Question

Is there any working difference between

$hash=sha1($key.$staticSalt);  

and

$hash=sha1($key.$randomSalt);  

Answer 1

Always use random salt for each password.

If you don't then the benefit of having the salt is lost. If you use the same salt , then in the case if website gets compromised , the hacker can use same hash table for hacking all the passwords in your userlist. If salt is random , then he has to have new hashtable for each user.