MySql FULL OUTER JOIN
-- MySql FULL OUTER JOIN
SELECT * FROM t1
LEFT JOIN t2 ON t1.id = t2.id
UNION ALL
SELECT * FROM t1
RIGHT JOIN t2 ON t1.id = t2.id
WHERE t1.id IS NULLMySql FULL OUTER JOIN
-- MySql FULL OUTER JOIN
SELECT * FROM t1
LEFT JOIN t2 ON t1.id = t2.id
UNION ALL
SELECT * FROM t1
RIGHT JOIN t2 ON t1.id = t2.id
WHERE t1.id IS NULLinner join mysql
SELECT column_name(s)
FROM table1
INNER JOIN table2
ON table1.column_name = table2.column_name;MySQL Join
A relational database consists of multiple related tables linking together using common columns which are known as foreign key columns. Because of this, data in each table is incomplete from the business perspective.
MySQL supports the following types of joins:
Inner join
Left join
Right join
Cross join
The following shows the basic syntax of the inner join clause that joins two tables table_1 and table_2:
SELECT column_list
FROM table_1
INNER JOIN table_2 ON join_condition;
SELECT column_list
FROM table_1
INNER JOIN table_2 USING (column_name);
SELECT column_list
FROM table_1
LEFT JOIN table_2 USING (column_name);
Here is the syntax of the right join:
SELECT column_list
FROM table_1
RIGHT JOIN table_2 ON join_condition;
The following shows the basic syntax of the cross join clause:
SELECT select_list
FROM table_1
CROSS JOIN table_2;Copyright © 2021 Codeinu
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