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david@intel-compute-stick:~$ mysql -u root -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 539
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 test055;
Query OK, 1 row affected (0.001 sec)
MariaDB [(none)]> USE test055;
Database changed
MariaDB [test055]> CREATE TABLE abc (name1 VARCHAR (16, name2 VARCHAR (16));
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ' name2 VARCHAR (16))' at line 1
MariaDB [test055]> CREATE TABLE abc (name1 VARCHAR (16), name2 VARCHAR (16));
Query OK, 0 rows affected (0.072 sec)
MariaDB [test055]> CREATE TABLE def (name3 VARCHAR (16), name4 VARCHAR (16));
Query OK, 0 rows affected (0.062 sec)
MariaDB [test055]> INSERT INTO abc VALUES ("001", "001");
Query OK, 1 row affected (0.035 sec)
MariaDB [test055]> INSERT INTO abc (name1, name2) VALUES ("001", "002");
Query OK, 1 row affected (0.031 sec)
MariaDB [test055]> INSERT INTO abc (name2, name1) VALUES ("001", "002");
Query OK, 1 row affected (0.029 sec)
MariaDB [test055]> INSERT INTO abc (name1, name2) VALUES ("001", "003");
Query OK, 1 row affected (0.029 sec)
MariaDB [test055]> INSERT INTO abc (name1, name2) VALUES ("003", "003");
Query OK, 1 row affected (0.025 sec)
MariaDB [test055]> INSERT INTO def (name3, name4) VALUES ("001", "001");
Query OK, 1 row affected (0.034 sec)
MariaDB [test055]> INSERT INTO def (name3, name4) VALUES ("001", "002");
Query OK, 1 row affected (0.026 sec)
MariaDB [test055]> SELECT * FROM abc;
+-------+-------+
| name1 | name2 |
+-------+-------+
| 001 | 001 |
| 001 | 002 |
| 002 | 001 |
| 001 | 003 |
| 003 | 003 |
+-------+-------+
5 rows in set (0.002 sec)
MariaDB [test055]> SELECT * FROM def;
+-------+-------+
| name3 | name4 |
+-------+-------+
| 001 | 001 |
| 001 | 002 |
+-------+-------+
2 rows in set (0.001 sec)
MariaDB [test055]> SELECT * FROM abc JOIN def;
+-------+-------+-------+-------+
| name1 | name2 | name3 | name4 |
+-------+-------+-------+-------+
| 001 | 001 | 001 | 001 |
| 001 | 001 | 001 | 002 |
| 001 | 002 | 001 | 001 |
| 001 | 002 | 001 | 002 |
| 002 | 001 | 001 | 001 |
| 002 | 001 | 001 | 002 |
| 001 | 003 | 001 | 001 |
| 001 | 003 | 001 | 002 |
| 003 | 003 | 001 | 001 |
| 003 | 003 | 001 | 002 |
+-------+-------+-------+-------+
10 rows in set (0.001 sec)
MariaDB [test055]> SELECT * FROM abc INNER JOIN def ON abc.name1 = def.name3;
+-------+-------+-------+-------+
| name1 | name2 | name3 | name4 |
+-------+-------+-------+-------+
| 001 | 001 | 001 | 001 |
| 001 | 001 | 001 | 002 |
| 001 | 002 | 001 | 001 |
| 001 | 002 | 001 | 002 |
| 001 | 003 | 001 | 001 |
| 001 | 003 | 001 | 002 |
+-------+-------+-------+-------+
6 rows in set (0.002 sec)
MariaDB [test055]> SELECT * FROM abc RIGHT JOIN def ON abc.name2 = def.name4;
+-------+-------+-------+-------+
| name1 | name2 | name3 | name4 |
+-------+-------+-------+-------+
| 001 | 001 | 001 | 001 |
| 001 | 002 | 001 | 002 |
| 002 | 001 | 001 | 001 |
+-------+-------+-------+-------+
3 rows in set (0.002 sec)
MariaDB [test055]> SELECT * FROM abc LEFT JOIN def ON abc.name1 = def.name3;
+-------+-------+-------+-------+
| name1 | name2 | name3 | name4 |
+-------+-------+-------+-------+
| 001 | 001 | 001 | 001 |
| 001 | 002 | 001 | 001 |
| 001 | 003 | 001 | 001 |
| 001 | 001 | 001 | 002 |
| 001 | 002 | 001 | 002 |
| 001 | 003 | 001 | 002 |
| 002 | 001 | NULL | NULL |
| 003 | 003 | NULL | NULL |
+-------+-------+-------+-------+
8 rows in set (0.002 sec)
MariaDB [test055]> QUIT
Bye
david@intel-compute-stick:~$