david@intel-compute-stick:/var/www/html/047$ mysql -u root -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 2661
Server version: 10.5.12-MariaDB-0+deb11u1 Debian 11
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> CREATE DATABASE test047;
Query OK, 1 row affected (0.029 sec)
MariaDB [(none)]> USE test047;
Database changed
MariaDB [test047]> CREATE TABLE abc (name1 VARCHAR (32), name2 VARCHAR (32));
Query OK, 0 rows affected (0.082 sec)
MariaDB [test047]> CREATE TABLE def (ijh VARCHAR (32), xyz VARCHAR (32));
Query OK, 0 rows affected (0.056 sec)
MariaDB [test047]> INSERT INTO abc VALUES ("001", "001");
Query OK, 1 row affected (0.033 sec)
MariaDB [test047]> INSERT INTO abc VALUES ("001", "002");
Query OK, 1 row affected (0.027 sec)
MariaDB [test047]> INSERT INTO abc VALUES ("002", "001");
Query OK, 1 row affected (0.027 sec)
MariaDB [test047]> INSERT INTO abc VALUES ("002", "002");
Query OK, 1 row affected (0.031 sec)
MariaDB [test047]> INSERT INTO def VALUES ("001", "001");
Query OK, 1 row affected (0.030 sec)
MariaDB [test047]> INSERT INTO def VALUES ("001", "002");
Query OK, 1 row affected (0.032 sec)
MariaDB [test047]> INSERT INTO def VALUES ("abc", "abc");
Query OK, 1 row affected (0.026 sec)
MariaDB [test047]> SELECT * FROM abc;
+-------+-------+
| name1 | name2 |
+-------+-------+
| 001 | 001 |
| 001 | 002 |
| 002 | 001 |
| 002 | 002 |
+-------+-------+
4 rows in set (0.001 sec)
MariaDB [test047]> SELECT * FROM abc JOIN def;
+-------+-------+------+------+
| name1 | name2 | ijh | xyz |
+-------+-------+------+------+
| 001 | 001 | 001 | 001 |
| 001 | 001 | 001 | 002 |
| 001 | 001 | abc | abc |
| 001 | 002 | 001 | 001 |
| 001 | 002 | 001 | 002 |
| 001 | 002 | abc | abc |
| 002 | 001 | 001 | 001 |
| 002 | 001 | 001 | 002 |
| 002 | 001 | abc | abc |
| 002 | 002 | 001 | 001 |
| 002 | 002 | 001 | 002 |
| 002 | 002 | abc | abc |
+-------+-------+------+------+
12 rows in set (0.002 sec)
MariaDB [test047]> SELECT * FROM abc INNER JOIN def ON abc.name1 = def.ijh;
+-------+-------+------+------+
| name1 | name2 | ijh | xyz |
+-------+-------+------+------+
| 001 | 001 | 001 | 001 |
| 001 | 001 | 001 | 002 |
| 001 | 002 | 001 | 001 |
| 001 | 002 | 001 | 002 |
+-------+-------+------+------+
4 rows in set (0.002 sec)
MariaDB [test047]> SELECT * FROM abc RIGHT JOIN def ON abc.name2 = def.xyz;
+-------+-------+------+------+
| name1 | name2 | ijh | xyz |
+-------+-------+------+------+
| 001 | 001 | 001 | 001 |
| 001 | 002 | 001 | 002 |
| 002 | 001 | 001 | 001 |
| 002 | 002 | 001 | 002 |
| NULL | NULL | abc | abc |
+-------+-------+------+------+
5 rows in set (0.002 sec)
MariaDB [test047]> SELECT * FROM abc LEFT JOIN def ON abc.name1 = def.ijh;
+-------+-------+------+------+
| name1 | name2 | ijh | xyz |
+-------+-------+------+------+
| 001 | 001 | 001 | 001 |
| 001 | 002 | 001 | 001 |
| 001 | 001 | 001 | 002 |
| 001 | 002 | 001 | 002 |
| 002 | 001 | NULL | NULL |
| 002 | 002 | NULL | NULL |
+-------+-------+------+------+
6 rows in set (0.002 sec)
MariaDB [test047]> quit
Bye
david@intel-compute-stick:/var/www/html/047$
