Untitled

03-02-2024
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min:- return the smallest value of the selected column.
syntax: select min(column) from tablename

ex: select min(salary) from employeeinfo;
select min(name) from employeeinfo ;
select min(name) from employeeinfo where address="pune";

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min:- return the largest value of the selected column.
syntax: select max(column) from tablename

ex:
select max(salary) from employeeinfo;
select max(salary) from employeeinfo where address="nagpur";
select max(name) from employeeinfo;

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Avg:- return average value  of a numeric column.
syntax: select avg(column) from tablename;

exa;
select avg(salary) from employeeinfo;
select avg(salary) from employeeinfo where salary>20000;


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sum:- return total addition(sum) of numeric column.

syntax: select sum(column) from tablename;
select sum(grade) from customer;
select sum(grade) from customer where grade=100


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assignment:

Q1.first create following table and insert value,

Q2.From the orders table, write a SQL query to calculate the average purchase amount of all orders.
Return average purchase amount. 

Q3.From the following table, write a SQL query that counts the number of unique salespeople. Return number of salespeople.  

Sample table: orders

ord_no      purch_amt   ord_date    customer_id  salesman_id
----------  ----------  ----------  -----------  -----------
70001       150.5       2012-10-05  3005         5002
70009       270.65      2012-09-10  3001         5005
70002       65.26       2012-10-05  3002         5001
70004       110.5       2012-08-17  3009         5003
70007       948.5       2012-09-10  3005         5002
70005       2400.6      2012-07-27  3007         5001
70008       5760        2012-09-10  3002         5001
70010       1983.43     2012-10-10  3004         5006
70003       2480.4      2012-10-10  3009         5003
70012       250.45      2012-06-27  3008         5002
70011       75.29       2012-08-17  3003         5007
70013       3045.6      2012-04-25  3002         5001