Use aggregate function in subquery : Subquery Aggregate Functions « Subquery « SQL Server / T-SQL






Use aggregate function in subquery


1> CREATE TABLE employee  (emp_no    INTEGER NOT NULL,
2>                         emp_fname CHAR(20) NOT NULL,
3>                         emp_lname CHAR(20) NOT NULL,
4>                         dept_no   CHAR(4) NULL)
5>
6> insert into employee values(1,  'Matthew', 'Smith',    'd3')
7> insert into employee values(2,  'Ann',     'Jones',    'd3')
8> insert into employee values(3,  'John',    'Barrimore','d1')
9> insert into employee values(4,  'James',   'James',    'd2')
10> insert into employee values(5,  'Elsa',    'Bertoni',  'd2')
11> insert into employee values(6,  'Elke',    'Hansel',   'd2')
12> insert into employee values(7,  'Sybill',  'Moser',    'd1')
13>
14> select * from employee
15> GO

(1 rows affected)

(1 rows affected)

(1 rows affected)

(1 rows affected)

(1 rows affected)

(1 rows affected)

(1 rows affected)
emp_no      emp_fname            emp_lname            dept_no
----------- -------------------- -------------------- -------
          1 Matthew              Smith                d3
          2 Ann                  Jones                d3
          3 John                 Barrimore            d1
          4 James                James                d2
          5 Elsa                 Bertoni              d2
          6 Elke                 Hansel               d2
          7 Sybill               Moser                d1

(7 rows affected)
1> -- Get the number and the last name of the employee with the smallest employee number.
2>
3> SELECT emp_no, emp_lname FROM employee
4>        WHERE emp_no = (SELECT MIN(emp_no) FROM employee)
5> GO
emp_no      emp_lname
----------- --------------------
          1 Smith

(1 rows affected)
1>
2> drop table employee
3> GO
1>
           
       








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