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| mysql> use test
Database changed
mysql> show tables;
Empty set (0.00 sec)
mysql> create table person( id smallint unsigned NOT NULL AUTO_INCREMENT, name varchar(30), primary key(id));
Query OK, 0 rows affected (0.12 sec)
mysql> create table score(id smallint unsigned NOT NULL, score int);
Query OK, 0 rows affected (0.14 sec)
mysql> show tables;
+
| Tables_in_test |
+
| person |
| score |
+
2 rows in set (0.00 sec)
mysql> insert into person(name) values ('zrx'),('genius'),('stupid');
Query OK, 3 rows affected (0.11 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql> select * from person;
+
| id | name |
+
| 1 | zrx |
| 2 | genius |
| 3 | stupid |
+
3 rows in set (0.00 sec)
mysql> insert into score values (1, 9),(2, 100);
Query OK, 2 rows affected (0.11 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> insert into score values (4,20);
Query OK, 1 row affected (0.11 sec)
mysql> insert into score values (1,1);
Query OK, 1 row affected (0.11 sec)
mysql> select * from score;
+
| id | score |
+
| 1 | 9 |
| 2 | 100 |
| 4 | 20 |
| 1 | 1 |
+
4 rows in set (0.00 sec)
mysql> select * from person inner join score ;
+
| id | name | id | score |
+
| 1 | zrx | 1 | 9 |
| 2 | genius | 1 | 9 |
| 3 | stupid | 1 | 9 |
| 1 | zrx | 2 | 100 |
| 2 | genius | 2 | 100 |
| 3 | stupid | 2 | 100 |
| 1 | zrx | 4 | 20 |
| 2 | genius | 4 | 20 |
| 3 | stupid | 4 | 20 |
| 1 | zrx | 1 | 1 |
| 2 | genius | 1 | 1 |
| 3 | stupid | 1 | 1 |
+
12 rows in set (0.00 sec)
mysql> select * from person inner join score where person.id=score.id;
+
| id | name | id | score |
+
| 1 | zrx | 1 | 9 |
| 2 | genius | 2 | 100 |
| 1 | zrx | 1 | 1 |
+
3 rows in set (0.00 sec)
mysql> select * from (person, score);
+
| id | name | id | score |
+
| 1 | zrx | 1 | 9 |
| 2 | genius | 1 | 9 |
| 3 | stupid | 1 | 9 |
| 1 | zrx | 2 | 100 |
| 2 | genius | 2 | 100 |
| 3 | stupid | 2 | 100 |
| 1 | zrx | 4 | 20 |
| 2 | genius | 4 | 20 |
| 3 | stupid | 4 | 20 |
| 1 | zrx | 1 | 1 |
| 2 | genius | 1 | 1 |
| 3 | stupid | 1 | 1 |
+
12 rows in set (0.00 sec)
mysql> select * from (person, score) using (id);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'using
(id)' at line 1
mysql> select * from (person, score) where person.id=score.id;
+
| id | name | id | score |
+
| 1 | zrx | 1 | 9 |
| 2 | genius | 2 | 100 |
| 1 | zrx | 1 | 1 |
+
3 rows in set (0.00 sec)
mysql> select * from person inner join score using (id);
+
| id | name | score |
+
| 1 | zrx | 9 |
| 2 | genius | 100 |
| 1 | zrx | 1 |
+
3 rows in set (0.00 sec)
mysql> select * from person natural join score;
+
| id | name | score |
+
| 1 | zrx | 9 |
| 2 | genius | 100 |
| 1 | zrx | 1 |
+
3 rows in set (0.00 sec)
mysql> select * from person left join score;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near '' at
line 1
mysql> select * from person left join score where person.id=score.id;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'where
person.id=score.id' at line 1
mysql> select * from person left join score using(id);
+
| id | name | score |
+
| 1 | zrx | 9 |
| 1 | zrx | 1 |
| 2 | genius | 100 |
| 3 | stupid | NULL |
+
4 rows in set (0.00 sec)
mysql> select * from person left join score on person.id=score.id;
+
| id | name | id | score |
+
| 1 | zrx | 1 | 9 |
| 1 | zrx | 1 | 1 |
| 2 | genius | 2 | 100 |
| 3 | stupid | NULL | NULL |
+
4 rows in set (0.00 sec)
mysql> select * from person right join score on person.id=score.id;
+
| id | name | id | score |
+
| 1 | zrx | 1 | 9 |
| 2 | genius | 2 | 100 |
| NULL | NULL | 4 | 20 |
| 1 | zrx | 1 | 1 |
+
4 rows in set (0.00 sec)
mysql> select * from person full outer join score on person.id=score.id;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'outer
join score on person.id=score.id' at line 1
mysql> select * from person full join score on person.id=score.id;
ERROR 1054 (42S22): Unknown column 'person.id' in 'on clause'
mysql> select * from person full join score using(id);
+
| id | name | score |
+
| 1 | zrx | 9 |
| 2 | genius | 100 |
| 1 | zrx | 1 |
+
3 rows in set (0.00 sec)
mysql> select * from person full join score on person.id=score.id;
ERROR 1054 (42S22): Unknown column 'person.id' in 'on clause'
mysql> select * from person p full join score s on p.id=s.id;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'full
join score s on p.id=s.id' at line 1
mysql> select * from person full outer join score using(id);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'outer
join score using(id)' at line 1
mysql> select * from person left join score using(id) union select * from person
right join score using (id);
+
| id | name | score |
+
| 1 | zrx | 9 |
| 1 | zrx | 1 |
| 2 | genius | 100 |
| 3 | stupid | NULL |
| 1 | 9 | zrx |
| 2 | 100 | genius |
| 4 | 20 | NULL |
| 1 | 1 | zrx |
+
8 rows in set (0.00 sec)
mysql> select * from person left join score on person.id=score.id union select *
from person right join score on person.id=score.id;
+
| id | name | id | score |
+
| 1 | zrx | 1 | 9 |
| 1 | zrx | 1 | 1 |
| 2 | genius | 2 | 100 |
| 3 | stupid | NULL | NULL |
| NULL | NULL | 4 | 20 |
+
5 rows in set (0.00 sec)
|
