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GowthamRaj K
2021-07-29 07:47:17 +05:30
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@@ -511,3 +511,17 @@ Following are some of the most commonly used constraints available in SQL −
- It is noticeable that the join is performed in the WHERE clause. - It is noticeable that the join is performed in the WHERE clause.
- Several operators can be used to join tables, such as =, <, >, <>, <=, >=, !=, BETWEEN, LIKE, and NOT; they can all be used to join tables. - Several operators can be used to join tables, such as =, <, >, <>, <=, >=, !=, BETWEEN, LIKE, and NOT; they can all be used to join tables.
- However, the most common operator is the equal to symbol. - However, the most common operator is the equal to symbol.
- There are different types of joins available in SQL −
INNER JOIN − returns rows when there is a match in both tables.
LEFT JOIN − returns all rows from the left table, even if there are no matches in the right table.
RIGHT JOIN − returns all rows from the right table, even if there are no matches in the left table.
FULL JOIN − returns rows when there is a match in one of the tables.
SELF JOIN − is used to join a table to itself as if the table were two tables, temporarily renaming at least one table in the SQL statement.
CARTESIAN JOIN − returns the Cartesian product of the sets of records from the two or more joined tables.