The answer is: a. A literal dollar sign, b. Shell variable syntax, and c. End-of-line anchor for pattern matching. Explanation: The $ character within a single-quoted regular expression can represent an end-of-line anchor or act as a literal dollar sign. In a double-quoted context, it assumes shell variable syntax.
I can see points from both sides here. First, files that should be deleted would be those we no longer need. The extra space on our computers is valuable. If a file was significant and you’ve handled it, it’s time to remove it since it’s no longer relevant. Now, on the contrary, we shouldn’t delete files because there might come a time when we need them again... For example, you may possess vital documents that you'd definitely want to keep. Or perhaps you’d like to reminisce by looking back at old photos or videos with friends or a significant other.
Answer:
Refer to the explanation
Explanation:
By utilizing the left outer join:
select custid,companyname,contactname,country,phone from sales.customers left outer join sales.orders on sales.customers=sales.order;
