Inserting SUM of a column from one table to other

Some time we have to collect the SUM , AVG or any other type of data from one table and store them in another table. Say for example we want to store sum of all marks of each student in a different table. We conducted different exams for students and now we will be adding all the marks for each student and store them in a different table. We will be using GROUP BY command to find out sum of all the marks or each student. Here is the SQL to do this.

insert into student3_total(s_id,mark) select id, sum(math + social +science) from student3 group by id

The above query will total all marks of each student and then store them in s_marks table. You can use AVG, MAX,MIN commands in place of SUM command to get desire result.
Storing Average Mark

INSERT INTO student3_total(s_id,mark) SELECT id, AVG(math + social +science) from student3 GROUP BY id

Creating a table & storing data.

If we have not created student3_total table before, then also we can create the table and store the data by using single query.

create table student3_total select id, AVG(math + social +science) from student3 group by id

Displaying the result with total mark using two tables

Above query will insert student id and sum of the mark to our student3_total table. Now we can join both table and display the final report. This report will collect name, id and individual mark from student3 table and total mark and student id from student3_total table. Two tables are joined by student id of both tables . Here is the query

SELECT id, name, class, social, science, math, s_id, mark
FROM  `student3` , student3_total
WHERE id = s_id

id	name	class	social	science	math	s_id	mark
2	Max Ruin	Three	85	56	85	2	226
3	Arnold	Three	55	40	75	3	170
4	Krish Star	Four	60	50	70	4	180
5	John Mike	Four	60	80	90	5	230
6	Alex John	Four	55	90	80	6	225
7	My John Rob	Fifth	78	60	70	7	208
8	Asruid	Five	85	80	90	8	255
9	Tes Qry	Six	78	60	70	9	208
10	Big John	Four	55	40	55	10	150

Here are our both tables with records for you to test the quey.

student3: Download the SQL dump of the above student table

student3_total : Download the SQL dump of total of student mark

Calculating and storing SUM of a column in another table

Creating a table & storing data.

Displaying the result with total mark using two tables

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