6 questions
In the IT development process of the six-month state-funded course Today, we've started a new journey with a book called Oracle SQL and PL/SQL, which are easy to learn with a variety of examples.There...
Hello, developersWhen users register an evaluation on a restaurant, it is saved as a store registered in the app Other users can search for the store I'm going to make an app like a restaurant evaluat...
The background of knowing the problem is that when selecting, the index was clearly created in consideration of the corresponding select statement, and in development db (local db), the index scan was...
I'm planning a car rental systemWe are implementing a function that shows the rental area on the next screen after inserting the rental area and the return area on the web. There are other columns in ...
I am currently studying oracle sqlplus.I'm asking you a question because an error occurred when inserting data after creating a table in the beginning while looking at the book. DEPTNO DNAME LOC---...
There is a task of expressing the above questions in relation algebra in the report after taking the class, and I would like to ask if the answer to question a is even if you express the above using t...
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