query to select oldest student(s) who takes) more than one course

by Shanna Cartwright 10 min read

How to get all students that have taken more than 5 courses?

An IN () subquery with a HAVING clause should do it: SELECT * FROM table WHERE StudentID IN ( SELECT StudentID FROM table GROUP BY userid HAVING COUNT (*) > 1 ) Share. Improve this answer. Follow this answer to receive notifications. answered Jan 1, 2012 at 21:09.

How to find the oldest and youngest records in SQL query?

TO DOWNLOAD THE SAMPLE LİBRARY DATABASE CLICK. Example1: List the oldest student. Transact-SQL. Select top 1 * from students order by birthdate. 1. Select top 1 * from students order by birthdate. or with Subquery.

How to get the number of students registered for more than 5?

If you are facing any issue or this is taking too long, please click to join directly. SQL Query to find students taking more than one class. Given three tables Student (sid,…) ,Class (cid,….) and joining table Student_class (sid,cid). Answer Added!!!

How do I get the number of students in a course?

Sql Query To Find Age From Date Of Birth In Sql; Library Database Sql Query Examples; Örnek Kütüphane Veritabanı İndir (Verili) Sql Random Number Between 1 and 100; Download Sample Library Database With Data


Which of the following query will find all unique students who have taken more than one course?

Q6) Which of the following query will find all the unique students who have taken more than one course? Option D would be a right option. This query will first apply self join on enrolled table and then it evaluate the condition e1. sid = e2.Jan 9, 2017

What will be the query to display the courses in which number of students enrolled is more than 5?

To get the students who are registered for more than 5 courses you do this... SELECT CAMPUS, STUDENT_ID FROM REGISTRATION WHERE SEMESTER = 'GIVEN SEMESTER' GROUP BY CAMPUS, STUDENT_ID HAVING COUNT(*) > 5; To get the number of students who are registered for more than 5 courses you do this...Dec 25, 2012

Can you do multiple selects in one query?

To combine two or more SELECT statements to form a single result table, use the set operators: UNION, EXCEPT or INTERSECT.

How do you SELECT data from more than one table?

To retrieve information from more than one table, you need to join those tables together. This can be done using JOIN methods, or you can use a second SELECT statement inside your main SELECT query—a subquery.Dec 6, 2019

What is select distinct in SQL?

The SELECT DISTINCT statement is used to return only distinct (different) values. Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values.

What is create view in SQL?

In SQL, a view is a virtual table based on the result-set of an SQL statement. A view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database.

How do you write two selects in SQL?

The UNION operator is used to combine the result-set of two or more SELECT statements.Every SELECT statement within UNION must have the same number of columns.The columns must also have similar data types.The columns in every SELECT statement must also be in the same order.

How do I write two SQL queries together?

In this step, you create the union query by copying and pasting the SQL statements.On the Create tab, in the Queries group, click Query Design.On the Design tab, in the Query group, click Union. ... Click the tab for the first select query that you want to combine in the union query.More items...

How do I run multiple queries in MySQL?

Multiple statements or multi queries must be executed with mysqli::multi_query . The individual statements of the statement string are separated by semicolon. Then, all result sets returned by the executed statements must be fetched.

What are the three ways to work with multiple tables in the same query?

Three Main Ways to Combine ResultsJOIN – You can use joins to combine columns from one or more queries into one result.UNION – Use Unions and other set operators to combine rows from one or more queries into one result.Sub Queries – I sometimes call these nested queries.Mar 6, 2022

What SQL keyword would you use to pull data from more than one table in a single query?

To put it simply, the “Join” makes relational database systems “relational”. Joins allow you to link data from two or more tables together into a single query result–from one single SELECT statement. A “Join” can be recognized in a SQL SELECT statement if it has more than one table after the FROM keyword.

How do you create a single table query in access?

How to Create Make Table Queries in AccessClick the Create tab on the ribbon.Click the Query Design button. ... Double-click the tables and queries you want to add and click Close. ... Select the fields that you want to include and click Close.Add any limiting criteria. ... Click the Make Table button on the ribbon.More items...

How does cluster_set get data?

CLUSTER_SET can get the data in one of the couple steps: It can use a mining type object to the information, or it can mine the data by performing an analytic clause that creates and uses one or more moving mining patterns.

What is select statement in SQL?

In the example below, we are extracting the “Student_ID” column or attribute from the table “STUDENT”. The select statement is used to select data from the database.

Why do you add comments to SQL?

An often overlooked but very important element of SQL scripting is adding comments to a script of queries to explain what it’s doing for the benefit of future developers who may need to revise and update your SQL queries.

What is sum in math?

SUM calculates the total of the attribute that is given to it as an argument. SUM is an aggregate function and it calculates the sum of all the distinct values. and the sum of all the duplicate values.

What is an AVG function?

Simple – an average of a given attribute. Average is also an aggregate function in SQL. The AVG () function computes the average of non-NULL values in a column. It ignores the null values.

What is a view in SQL?

In other words, a view is just a mirrored copy of a table whose data is the result of a stored query. A view is a legitimate copy of a different table or sequence of tables. A view obtains its information or data from the tables from previously created tables known as base tables. Base tables are real tables.

What is user defined table?

A user-defined table is a representation of defined information in a table, and they can be used as arguments for procedures or user-defined functions. Because they’re so useful, it’s useful to keep track of them using the following query. User tables explain the relational tables of the current user. 1.