The FULL OUTER JOIN command returns all rows when there is a match in either left table or right table. … Note: The FULL OUTER JOIN keyword returns all the rows from the left table (Customers), and all the rows from the right table (Orders).
Is join a function in SQL?
SQL Server supports table valued functions, what are functions that return data in the form of tables. JOIN operations in SQL Server are used to join two or more tables. However, JOIN operations cannot be used to join a table with the output of a table valued function. APPLY operators are used for this purpose.
What are the type of join in SQL?
Basic SQL JOIN types
- INNER JOIN. INNER JOIN statement returns only those records or rows that have matching values and is used to retrieve data that appears in both tables. …
- OUTER JOIN. …
- LEFT OUTER JOIN. …
- RIGHT OUTER JOIN. …
- SELF JOIN. …
- CROSS JOIN.
What are the 3 types of joins in SQL?
Basically we have only three types of joins : Inner join, Outer join and Cross join. We use any of these three JOINS to join a table to itself.
What are the keywords used in SQL?
|ANY||Returns true if any of the subquery values meet the condition|
|AS||Renames a column or table with an alias|
|ASC||Sorts the result set in ascending order|
|BACKUP DATABASE||Creates a back up of an existing database|
What is self join in SQL?
SELF JOIN: As the name signifies, in SELF JOIN a table is joined to itself. That is, each row of the table is joined with itself and all other rows depending on some conditions. In other words we can say that it is a join between two copies of the same table.
What is the difference between inner join and outer join?
The major difference between inner and outer joins is that inner joins result in the intersection of two tables, whereas outer joins result in the union of two tables.
What is equi join?
An equi join is a type of join that combines tables based on matching values in specified columns. … The column names do not need to be the same. The resultant table contains repeated columns. It is possible to perform an equi join on more than two tables.
What is SQL DML commands?
DML is short name of Data Manipulation Language which deals with data manipulation and includes most common SQL statements such SELECT, INSERT, UPDATE, DELETE, etc., and it is used to store, modify, retrieve, delete and update data in a database.
What is natural join in DBMS?
A NATURAL JOIN is a JOIN operation that creates an implicit join clause for you based on the common columns in the two tables being joined. Common columns are columns that have the same name in both tables. A NATURAL JOIN can be an INNER join, a LEFT OUTER join, or a RIGHT OUTER join.
Can we insert and delete rows into a view?
If the view contains joins between multiple tables, you can only insert and update one table in the view, and you can’t delete rows. You can’t directly modify data in views based on union queries.
What are cursors in DBMS?
Cursor is a Temporary Memory or Temporary Work Station. It is Allocated by Database Server at the Time of Performing DML operations on Table by User. Cursors are used to store Database Tables.
What is join in DBMS?
In DBMS, a join statement is mainly used to combine two tables based on a specified common field between them. If we talk in terms of Relational algebra, it is the cartesian product of two tables followed by the selection operation.
Is null a keyword in SQL?
NULL is also an SQL reserved keyword used to identify the Null special marker. NULL means “a missing unknown value” and it is treated somewhat differently from other values. A field with a NULL value is a field with no value.
Is ODBC an API?
Open Database Connectivity (ODBC) is an open standard Application Programming Interface (API) for accessing a database.
How do you use keywords in SQL query?
The keyword here is reserved word. If you ARE using SQL Server, you can just simply wrap the square brackets around the column or table name. I have also faced this issue. And the solution for this is to put [Column_Name] like this in the query.