Mega Code Archive
Subqueries and Comparison Operators
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15>
16> CREATE TABLE employee (emp_no INTEGER NOT NULL,
17> emp_fname CHAR(20) NOT NULL,
18> emp_lname CHAR(20) NOT NULL,
19> dept_no CHAR(4) NULL)
20> GO
1> insert into employee values(1, 'Matthew', 'Smith', 'd3')
2> insert into employee values(2, 'Ann', 'Jones', 'd3')
3> insert into employee values(3, 'John', 'Barrimore','d1')
4> insert into employee values(4, 'James', 'James', 'd2')
5> insert into employee values(5, 'Elsa', 'Bertoni', 'd2')
6> insert into employee values(6, 'Elke', 'Hansel', 'd2')
7> insert into employee values(7, 'Sybill', 'Moser', 'd1')
8> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
1> select * from employee
2> GO
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>
2> CREATE TABLE department(dept_no CHAR(4) NOT NULL,
3> dept_name CHAR(25) NOT NULL,
4> location CHAR(30) NULL)
5>
6> insert into department values ('d1', 'developer', 'Dallas')
7> insert into department values ('d2', 'tester', 'Seattle')
8> insert into department values ('d3', 'marketing', 'Dallas')
9>
10> select * from department
11> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
dept_no dept_name location
------- ------------------------- ------------------------------
d1 developer Dallas
d2 tester Seattle
d3 marketing Dallas
(3 rows affected)
1>
2> -- Subqueries and Comparison Operators
3>
4> SELECT emp_fname, emp_lname FROM employee
5> WHERE dept_no = (SELECT dept_no FROM department WHERE dept_name = 'marketing')
6> GO
emp_fname emp_lname
-------------------- --------------------
Matthew Smith
Ann Jones
(2 rows affected)
1>
2> drop table department
3> drop table employee
4> GO
1>
2>
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