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

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


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

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)
emp_no      emp_fname            emp_lname            dept_no
----------- -------------------- -------------------- -------
          Matthew              Smith                d3
          Ann                  Jones                d3
          John                 Barrimore            d1
          James                James                d2
          Elsa                 Bertoni              d2
          Elke                 Hansel               d2
          Sybill               Moser                d1

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

(rows affected)
1>
2> drop table employee
3> GO
1>
           
       
Related examples in the same category
1. Use aggregate function MAX in subquery
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