Which SQL query find details of students having average marks greater than 60?
The query for the data:
Syntax: SELECT column1 FROM table_name WHERE column2 > (SELECT AVG( column2) FROM table_name);
How do you find the average of marks in SQL?
SQL AVG Function
- SELECT AVG (<expression>) FROM “table_name”;
- SELECT “column_name1”, “column_name2″, … ” column_nameN”, AVG (<expression>) FROM “table_name”; …
- SELECT AVG(Sales) FROM Store_Information;
- SELECT AVG(Sales*0.1) FROM Store_Information;
- SELECT Store_Name, AVG(Sales) FROM Store_Information GROUP BY Store_Name;
How can we get average marks from student table in MySQL?
You can download the MySQL dump of the table with sample data here. Adding average mark of each student. We used LEFT JOIN to join the same table and get the average mark of each student. Now we will store the class average against each student by using GROUP BY Query.
Which SQL query is written to find out the list of students?
select * from student1 where student_fname like ‘%a%’ and student_lname like ‘%a%’; Also note that ‘%a’ will give you students that have names ending in a .
How are SQL commands classified?
These SQL commands are mainly categorized into four categories as: DDL – Data Definition Language. … DML – Data Manipulation Language. DCL – Data Control Language.
Which operation is not allowed in JOIN?
To be modifiable, a join view must not contain any of the following: Hierarchical query clauses, such as START WITH or CONNECT BY. GROUP BY or HAVING clauses. Set operations, such as UNION, UNION ALL, INTERSECT, MINUS.
How can we insert data into a view?
You can insert rows into a view only if the view is modifiable and contains no derived columns. The reason for the second restriction is that an inserted row must provide values for all columns, but the database server cannot tell how to distribute an inserted value through an expression.
How do I count query results in SQL?
To counts all of the rows in a table, whether they contain NULL values or not, use COUNT(*). That form of the COUNT() function basically returns the number of rows in a result set returned by a SELECT statement.
How do you calculate in SQL?
You can use the string expression argument in an SQL aggregate function to perform a calculation on values in a field. For example, you could calculate a percentage (such as a surcharge or sales tax) by multiplying a field value by a fraction.
How average student marks are calculated?
Suppose six students scored 72, 75, 78, 82, 84, and 92 on a test. To calculate the average, add the test scores together and divide the sum (483) by six. The average score would be 80.5.
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)