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Full Discussion: MySQL join four tables!
Top Forums Programming MySQL join four tables! Post 302592391 by yifangt on Monday 23rd of January 2012 05:49:08 PM
Old 01-23-2012
MySQL join four tables!
Hello;
I want merge four MySQL tables to get the intersection that have a common field for all of them. Join two tables is fine to me, but my this case is different from common situations and there are not very many discussions about it. Can anybody give me some idea? Thanks a lot!
Here is part of my simplified tables (out of ~30000 rows per table and more than 10 columns of complicate formats, so that I do not want use shell command JOIN or other want to do the job!):
Code:
TableA:
A1   O
A2   P
A3   Q
A4   R
A5   S
A6   T

TableB:
B1   A1
B2   A2
B3   A3
B4   A4
B5   A1
B6   A2

Table C: 
C1   A1
C2   A2
C3   A2
C4   A4
C5   A4
C6   A1

TableD
D1   A1
D2   A2
D3   A3
D4   A4
D5   A5
D6   A1

The output is expected to be:
Code:
B1   A1   C1   A1   D1   A1   O   
B2   A2   C2   A2   D2   A2   P
B4   A4   C4   A4   D4   A4   R

My Code is:

SELECT
B.ID, B.AGI,
C.ID, C.AGI,
D.ID, D.AGI,
A.ID, A.AGI FROM TableB B, TableC C, TableD D, TableA A WHERE
B.AGI = A.ID
AND C.AGI = A.ID
AND D.AGI = A.ID
AND B.AGI = C.AGI
AND D.AGI = C.AGI
AND B.AGI = D.AGI;

But the output is not what I expected:
Code:
+------+------+------+------+------+------+------+------+
| ID   | AGI  | ID   | AGI  | ID   | AGI  | ID   | AGI  |
+------+------+------+------+------+------+------+------+
| B1   | A1   | C1   | A1   | D1   | A1   | A1   | O    |
| B5   | A1   | C1   | A1   | D1   | A1   | A1   | O    |
| B1   | A1   | C6   | A1   | D1   | A1   | A1   | O    |
| B5   | A1   | C6   | A1   | D1   | A1   | A1   | O    |
| B1   | A1   | C1   | A1   | D6   | A1   | A1   | O    |
| B5   | A1   | C1   | A1   | D6   | A1   | A1   | O    |
| B1   | A1   | C6   | A1   | D6   | A1   | A1   | O    |
| B5   | A1   | C6   | A1   | D6   | A1   | A1   | O    |
| B2   | A2   | C2   | A2   | D2   | A2   | A2   | P    |
| B6   | A2   | C2   | A2   | D2   | A2   | A2   | P    |
| B2   | A2   | C3   | A2   | D2   | A2   | A2   | P    |
| B6   | A2   | C3   | A2   | D2   | A2   | A2   | P    |
| B4   | A4   | C4   | A4   | D4   | A4   | A4   | R    |
| B4   | A4   | C5   | A4   | D4   | A4   | A4   | R    |
+------+------+------+------+------+------+------+------+
14 rows in set (0.00 sec)

Can anybody give me some idea? Got lost with the LEFT/ RIGHT/INNER JOINs. Expert suggestion can save me days of scratch. Thanks a lot!
 

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LEARN ABOUT LINUX

ndbinfo_select_all

NDBINFO_SELECT_AL(1)					       MySQL Database System					      NDBINFO_SELECT_AL(1)

NAME

       ndbinfo_select_all - select from ndbinfo tables

SYNOPSIS

       ndbinfo_select_all options

DESCRIPTION

       ndbinfo_select_all is a client program that selects all rows and columns from one or more tables in the ndbinfo database. It is included
       with the MySQL Cluster distribution beginning with MySQL Cluster NDB 7.2.2.

       Not all ndbinfo tables can be accessed by this program.	ndbinfo_select_all can access the counters, diskpagebuffer, logbuffers, logspaces,
       nodes, resources, threadblocks, threadstat, and transporters tables.

       To select from one or more ndbinfo tables using ndbinfo_select_all, it is necessary to supply the names of the tables when invoking the
       program as shown here:

	   shell> ndbinfo_select_all table_name1  [table_name2] [...]

       For example:

	   shell> ndbinfo_select_all logbuffers logspaces
	   == logbuffers ==
	   node_id log_type	   log_id  log_part	   total   used    high
	   5	   0	   0	   0	   33554432	   262144  0
	   6	   0	   0	   0	   33554432	   262144  0
	   7	   0	   0	   0	   33554432	   262144  0
	   8	   0	   0	   0	   33554432	   262144  0
	   == logspaces ==
	   node_id log_type	   log_id  log_part	   total   used    high
	   5	   0	   0	   0	   268435456	   0	   0
	   5	   0	   0	   1	   268435456	   0	   0
	   5	   0	   0	   2	   268435456	   0	   0
	   5	   0	   0	   3	   268435456	   0	   0
	   6	   0	   0	   0	   268435456	   0	   0
	   6	   0	   0	   1	   268435456	   0	   0
	   6	   0	   0	   2	   268435456	   0	   0
	   6	   0	   0	   3	   268435456	   0	   0
	   7	   0	   0	   0	   268435456	   0	   0
	   7	   0	   0	   1	   268435456	   0	   0
	   7	   0	   0	   2	   268435456	   0	   0
	   7	   0	   0	   3	   268435456	   0	   0
	   8	   0	   0	   0	   268435456	   0	   0
	   8	   0	   0	   1	   268435456	   0	   0
	   8	   0	   0	   2	   268435456	   0	   0
	   8	   0	   0	   3	   268435456	   0	   0
	   shell>

       The following table includes options that are specific to ndbinfo_select_all. Additional descriptions follow the table. For options common
       to most MySQL Cluster programs (including ndbinfo_select_all), see Options Common to MySQL Cluster Programs(1).

       Table 17.11. ndbinfo_select_all Options and Variables: MySQL Cluster NDB 7.2
       +---------------------------+--------------------------------------+-------------------------------------+
       |Format			   | Description			  | Added / Removed			|
       +---------------------------+--------------------------------------+-------------------------------------+
       |			   | Set the delay in seconds between	  |					|
       |       --delay=#	   | loops. Default is 5.		  |	   All MySQL 5.5 based releases |
       +---------------------------+--------------------------------------+-------------------------------------+
       |			   | Set the number of times to perform   |					|
       |       --loops=#,	   | the select. Default is 1.		  |	   All MySQL 5.5 based releases |
       |			   |					  |					|
       |       -l		   |					  |					|
       +---------------------------+--------------------------------------+-------------------------------------+
       |			   | Name of the database where the table |					|
       |       --database=db_name, | located.				  |	   All MySQL 5.5 based releases |
       |			   |					  |					|
       |       -d		   |					  |					|
       +---------------------------+--------------------------------------+-------------------------------------+
       |			   | Set the degree of parallelism.	  |					|
       |       --parallelism=#,    |					  |	   All MySQL 5.5 based releases |
       |			   |					  |					|
       |       -p		   |					  |					|
       +---------------------------+--------------------------------------+-------------------------------------+

       o   --delay=seconds

	   +--------------------+------------------------+
	   |Command-Line Format | --delay=#		 |
	   +--------------------+------------------------+
	   |			| Permitted Values	 |
	   |			+---------+--------------+
	   |			| Type	  | numeric	 |
	   |			+---------+--------------+
	   |			| Default | 5		 |
	   |			+---------+--------------+
	   |			| Range   | 0 .. MAX_INT |
	   +--------------------+---------+--------------+
	   This option sets the number of seconds to wait between executing loops. Has no effect if --loops is set to 0 or 1.

       o   --loops=number, -l number

	   +--------------------+------------------------+
	   |Command-Line Format | --loops=#		 |
	   +--------------------+------------------------+
	   |			| -l			 |
	   +--------------------+------------------------+
	   |			| Permitted Values	 |
	   |			+---------+--------------+
	   |			| Type	  | numeric	 |
	   |			+---------+--------------+
	   |			| Default | 1		 |
	   |			+---------+--------------+
	   |			| Range   | 0 .. MAX_INT |
	   +--------------------+---------+--------------+
	   This option sets the number of times to execute the select. Use --delay to set the time between loops.

COPYRIGHT

       Copyright (C) 1997, 2014, Oracle and/or its affiliates. All rights reserved.

       This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as
       published by the Free Software Foundation; version 2 of the License.

       This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation,
       Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.

SEE ALSO

       For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online
       at http://dev.mysql.com/doc/.

AUTHOR

       Oracle Corporation (http://dev.mysql.com/).

MySQL 5.5							    01/30/2014						      NDBINFO_SELECT_AL(1)
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