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How to write this kind of query in Oracle

I have a MySQL database and I want to migrate all query to Oracle and since I am not an expert in Oracle SQL I am stuck here. I have query like this My question is: How to write this ORDER BY expression in Oracle SQL? Answer You can use There is no column naming format containing back ticks in

Can’t return column table when the table have just FK?

When I choose a table when it doesn’t have any Primary Key, my query returns nothing. So what’s the problem in this query? This is result when I have pkin my table: And this is result when I haven’t pkin my table: Here is the query: Answer As you are putting INNER JOIN with PRIMARY KEY const…

right way to get sum of all the counts done in sql

This is my query, I want to get how many numbers of phones call received today as one column, so how do I do a sum using count function? If I do a sum, that would just return the total sum? how do I return the total numbers of all calls received today, I would do count uniquecallerID and then