Querying data from multiple tables

Author: learning-zone

mysql-queries.md

@@ -42,3 +42,17 @@ In database management, an aggregate function is a function where the values of
 | 07.  |SELECT c1 FROM t ORDER BY c1LIMIT n OFFSET offset|Select data in column c1 from a table named t and skip offset of rows and return the next n rows|
 | 08.  |SELECT c1, aggregate(c2) FROM t GROUP BY c1|Select data in column c1 from a table named t and group rows using an aggregate function |
 | 09.  |SELECT c1, aggregate(c2) FROM t GROUP BY c1 HAVING condition|Select data in column c1 from a table named t and group rows using an aggregate function and filter these groups using ‘HAVING’ clause|
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+
+#### Querying data from multiple tables
+
+|Sl.No|Query            | Description                                       |
+|-----|-----------------|---------------------------------------------------|
+| 01. |SELECT c1, c2 FROM t1 INNER JOIN t2 on condition|Select columns c1 and c2 from a table named t1 and perform an inner join between t1 and t2  |
+| 02. |SELECT c1, c2 FROM t1 LEFT JOIN t2 on condition|Select columns c1 and c2 from a table named t1 and perform a left join between t1 and t2|
+| 03. |SELECT c1, c2 FROM t1 RIGHT JOIN t2 on condition|Select columns c1 and c2 from a table named t1 and perform a right join between t1 and t2|
+| 04. |SELECT c1, c2 FROM t1 FULL OUTER JOIN t2 on condition|Select columns c1 and c2 from a table named t1 and perform a full outer join between t1 and t2|
+| 05. |SELECT c1, c2 FROM t1 CROSS JOIN t2 |Select columns c1 and c2 from a table named t1 and produce a Cartesian product of rows in tables|
+| 06. |SELECT c1, c2 FROM t1, t2 |Same as above - Select columns c1 and c2 from a table named t1 and produce a Cartesian product of rows in tables|
+| 07. |SELECT c1, c2 FROM t1 A INNER JOIN t2 B on condition |Select columns c1 and c2 from a table named t1 and joint it to itself using an INNER JOIN clause|
+