ANSI join syntax: join three tables : ANSI Join Syntax « Table Joins « SQL Server / T-SQL

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SQL Server / T-SQL » Table Joins » ANSI Join Syntax 
ANSI join syntax: join three tables

35CREATE TABLE employee  (emp_no    INTEGER NOT NULL,
36>                         emp_fname CHAR(20NOT NULL,
37>                         emp_lname CHAR(20NOT NULL,
38>                         dept_no   CHAR(4NULL)
39>
40insert into employee values(1,  'Matthew', 'Smith',    'd3')
41insert into employee values(2,  'Ann',     'Jones',    'd3')
42insert into employee values(3,  'John',    'Barrimore','d1')
43insert into employee values(4,  'James',   'James',    'd2')
44insert into employee values(5,  'Elsa',    'Bertoni',  'd2')
45insert into employee values(6,  'Elke',    'Hansel',   'd2')
46insert into employee values(7,  'Sybill',  'Moser',    'd1')
47>
48select from employee
49> 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>
2>
3CREATE TABLE department(dept_no   CHAR(4NOT NULL,
4>                         dept_name CHAR(25NOT NULL,
5>                         location  CHAR(30NULL)
6>
7insert into department values ('d1', 'developer',   'Dallas')
8insert into department values ('d2', 'tester',      'Seattle')
9insert into department values ('d3', 'marketing',  'Dallas')
10>
11select from department
12> GO

(rows affected)

(rows affected)

(rows affected)
dept_no dept_name                 location
------- ------------------------- ------------------------------
d1      developer                 Dallas
d2      tester                    Seattle
d3      marketing                 Dallas

(rows affected)
1CREATE TABLE works_on        (emp_no       INTEGER NOT NULL,
2>                         project_no    CHAR(4NOT NULL,
3>                         job CHAR (15NULL,
4>                         enter_date    DATETIME NULL)
5>
6insert into works_on values (1'p1', 'analyst', '1997.10.1')
7insert into works_on values (1'p3', 'manager', '1999.1.1')
8insert into works_on values (2'p2', 'clerk',   '1998.2.15')
9insert into works_on values (2'p2',  NULL,     '1998.6.1')
10insert into works_on values (3'p2',  NULL,     '1997.12.15')
11insert into works_on values (4'p3', 'analyst', '1998.10.15')
12insert into works_on values (5'p1', 'manager', '1998.4.15')
13insert into works_on values (6'p1',  NULL,     '1998.8.1')
14insert into works_on values (7'p2', 'clerk',   '1999.2.1')
15insert into works_on values (8'p3', 'clerk',   '1997.11.15')
16insert into works_on values (7'p1', 'clerk',   '1998.1.4')
17>
18select from works_on
19> GO

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)
emp_no      project_no job             enter_date
----------- ---------- --------------- -----------------------
          p1         analyst         1997-10-01 00:00:00.000
          p3         manager         1999-01-01 00:00:00.000
          p2         clerk           1998-02-15 00:00:00.000
          p2         NULL            1998-06-01 00:00:00.000
          p2         NULL            1997-12-15 00:00:00.000
          p3         analyst         1998-10-15 00:00:00.000
          p1         manager         1998-04-15 00:00:00.000
          p1         NULL            1998-08-01 00:00:00.000
          p2         clerk           1999-02-01 00:00:00.000
          p3         clerk           1997-11-15 00:00:00.000
          p1         clerk           1998-01-04 00:00:00.000

(11 rows affected)
1> -- ANSI join syntax:
2SELECT emp_fname, emp_lname
3>          FROM works_on
4>          JOIN employee ON works_on.emp_no=employee.emp_no
5>                   JOIN department ON employee.dept_no=department.dept_no
6>          AND location = 'Seattle'
7>          AND job = 'analyst'
8>
9> drop table employee
10> drop table department
11> drop table works_on
12> GO
emp_fname            emp_lname
-------------------- --------------------
James                James

(rows affected)
1>

           
       
Related examples in the same category
1. Reference table name
2. ANSI join syntax: join on
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