how to write a query to display topper in each course?

How do you write a query to display all records?

SELECT SyntaxSELECT column1, column2, ... FROM table_name;SELECT * FROM table_name;Example. SELECT CustomerName, City FROM Customers;Example. SELECT * FROM Customers;

How do I write a query for top 5 data in SQL?

SQL SELECT TOP ClauseSQL Server / MS Access Syntax. SELECT TOP number|percent column_name(s) FROM table_name;MySQL Syntax. SELECT column_name(s) FROM table_name. LIMIT number;Example. SELECT * FROM Persons. LIMIT 5;Oracle Syntax. SELECT column_name(s) FROM table_name. WHERE ROWNUM <= number;Example. SELECT * FROM Persons.

How are query results displayed?

You have the option of displaying your query results on the Run SQL window, as opposed to Data Display windows. To do this, go to View > Data Grid (Ctrl+G). Once you have selected this option, a panel will appear at the bottom of the window - your query results will be displayed there.

How do you get the name of a the student who got Max marks in each subject?

Select subjectid,max(marks) from students group by subjectid;chandinikiran. Answered On : Mar 2nd, 2010.SELECT s1.studentid, s1.subjectid, s2.mks FROM student s1, (SELECT s.subjectid, max(s.marks) as mks from student s group by s.subjectid ) s2WHERE s1.subjectid =s2.subjectid and s1.marks= s2.mksORDER BY s1.studentid.

How do you select top 10 values in SQL?

Example - Using TOP PERCENT keyword SELECT TOP(10) PERCENT contact_id, last_name, first_name FROM contacts WHERE last_name = 'Anderson' ORDER BY contact_id; This SQL SELECT TOP example would select the first 10% of the records from the full result set.

How do I select top 10 rows in SQL Developer?

“oracle select first 10 rows” Code AnswerSELECT * FROM (SELECT [COLUMNS] FROM [TABLE] ORDER BY [DATE] DESC)WHERE ROWNUM >= 1 AND ROWNUM <=10;-- Oracle 12c:SELECT * FROM (SELECT [COLUMNS] FROM [TABLE] ORDER BY [DATE] DESC)FETCH FIRST 10 ROWS ONLY;

How do you Create a query?

Create a select query Select Create > Query Wizard . Select Simple Query, and then OK. Select the table that contains the field, add the Available Fields you want to Selected Fields, and select Next. Choose whether you want to open the query in Datasheet view or modify the query in Design view, and then select Finish.

How do I display the results in SQL Server?

In the Options dialog box, expand Query Results, expand SQL Server and then select Results to Text tab as shown in the snippet below. In the right side panel first select the checkbox for Display results in a separate tab and then select the checkbox for Switch to results tab after the query executes and then click OK.

How do you write a database query?

How to Create a SQL StatementStart your query with the select statement. select [all | distinct] ... Add field names you want to display. field1 [,field2, 3, 4, etc.] ... Add your statement clause(s) or selection criteria. Required: ... Review your select statement. Here's a sample statement:

How do you get names and marks of the top 3 students?

SELECT statement is used to get name and marks of top three students.SQL query is. SELECT Name, Marks FROM Student s1 where 3 <= (SELECT COUNT(*) FROM Students s2 WHERE s1.marks = s2.marks)SQL (Structured Query Language) ... Functions of SQL (Structured Query Language)

How will you show the maximum marks and Min marks together from the student table?

5. How to Show the Max marks and min marks together from student table? Select min (marks) from Student; Tip : Use the concept of union to show the max and min marks together.

How can calculate total marks in SQL query?

SQL SELECT COUNT, SUM, and AVG COUNT returns a count of the number of data values. SUM returns the sum of the data values. AVG returns the average of the data values. For a list of all aggregate functions see our aggregate functions reference.

The Challenge

Given the database tables below, use your SQL skills to answer as many of the questions that follow.

Solutions

There are multiple ways to write the SQL queries that answer this challenge’s questions, so they may not exactly match your own. Here are my answers to the questions. Check out the solutions Gist, if you prefer to view them there.