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SET AUTOCOMMIT = 0
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--------------
START TRANSACTION
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DROP DATABASE IF EXISTS `base`
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CREATE DATABASE `base`
default character set `latin1`
default collate `latin1_general_ci`
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DROP TABLE IF EXISTS `table_a`
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CREATE TABLE `table_a`
( `clef` integer unsigned not null auto_increment primary key,
`col1` varchar(255) not null,
`col2` varchar(255) not null
) engine=innoDB
default charset=latin1 collate=latin1_general_ci
row_format=compressed
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insert into `table_a` (`clef`,`col1`,`col2`) value
(1, 'a', 'z'),
(2, 'b', 'y'),
(3, 'c', 'x')
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select * from table_a
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+------+------+------+
| clef | col1 | col2 |
+------+------+------+
| 1 | a | z |
| 2 | b | y |
| 3 | c | x |
+------+------+------+
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DROP TABLE IF EXISTS `table_b`
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--------------
CREATE TABLE `table_b`
( `clef` integer unsigned not null auto_increment primary key,
`col1` varchar(255) not null,
`col2` varchar(255) not null
) engine=innoDB
default charset=latin1 collate=latin1_general_ci
row_format=compressed
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insert into `table_b` (`clef`,`col1`,`col2`) value
(2, 'd', 'w'),
(3, 'e', 'v'),
(4, 'f', 'u')
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select * from table_b
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+------+------+------+
| clef | col1 | col2 |
+------+------+------+
| 2 | d | w |
| 3 | e | v |
| 4 | f | u |
+------+------+------+
--------------
select *
from (
select tb1.clef as clef,
tb1.col1 as col1a, tb1.col2 as col2a,
tb2.col1 as col1b, tb2.col2 as col2b
from table_a as tb1
left outer join table_b as tb2
on tb2.clef = tb1.clef
union
select tb2.clef as clef,
tb1.col1 as col1a, tb1.col2 as col2a,
tb2.col1 as col1b, tb2.col2 as col2b
from table_a as tb1
right outer join table_b as tb2
on tb2.clef = tb1.clef
) as x
where col1a = 'b' and col2b = 'w'
--------------
+------+-------+-------+-------+-------+
| clef | col1a | col2a | col1b | col2b |
+------+-------+-------+-------+-------+
| 2 | b | y | d | w |
+------+-------+-------+-------+-------+
--------------
select *
from (
select tb1.clef as clef,
tb1.col1 as col1a, tb1.col2 as col2a,
tb2.col1 as col1b, tb2.col2 as col2b
from table_a as tb1
left outer join table_b as tb2
on tb2.clef = tb1.clef
union
select tb2.clef as clef,
tb1.col1 as col1a, tb1.col2 as col2a,
tb2.col1 as col1b, tb2.col2 as col2b
from table_a as tb1
right outer join table_b as tb2
on tb2.clef = tb1.clef
) as x
where col1a = 'b' or col2b = 'v'
--------------
+------+-------+-------+-------+-------+
| clef | col1a | col2a | col1b | col2b |
+------+-------+-------+-------+-------+
| 2 | b | y | d | w |
| 3 | c | x | e | v |
+------+-------+-------+-------+-------+
--------------
select *
from (
select tb1.clef as clef,
tb1.col1 as col1a, tb1.col2 as col2a,
tb2.col1 as col1b, tb2.col2 as col2b
from table_a as tb1
left outer join table_b as tb2
on tb2.clef = tb1.clef
union
select tb2.clef as clef,
tb1.col1 as col1a, tb1.col2 as col2a,
tb2.col1 as col1b, tb2.col2 as col2b
from table_a as tb1
right outer join table_b as tb2
on tb2.clef = tb1.clef
) as x
where col1a = 'a' or col2b = 'u'
--------------
+------+-------+-------+-------+-------+
| clef | col1a | col2a | col1b | col2b |
+------+-------+-------+-------+-------+
| 1 | a | z | NULL | NULL |
| 4 | NULL | NULL | f | u |
+------+-------+-------+-------+-------+
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commit
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set autocommit = 1
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