Query within another query is called as Subquery. A subquery is called inner query which returns output that is to be used by another query.
Posted Date:- 2021-08-17 05:46:38
What is the need for MERGE statement?
Define UNION, MINUS, UNION ALL, INTERSECT?
What is the Cartesian product of the table?
Write a SQL query to find the names of employees that begin with ‘A’?
Are NULL values same as that of zero or a blank space?
What is Collation? What are the different types of Collation Sensitivity?
What is the difference between DELETE and TRUNCATE statements?
What are the different types of joins in SQL?
What are the different operators available in SQL?
Explain different types of index in SQL.
What do you mean by Denormalization?
Write a SQL query to display the current date?
What is the difference between clustered and non-clustered index in SQL?
What is an alternative for TOP clause in SQL?
How do you add a column to a table?
What is Database Black Box Testing?
Explain database white box testing and black box testing.
What is a Relationship? How many types of Relationships are there?
What is the difference between DROP and TRUNCATE?
What are the types of SQL Queries?
How to rename column name in SQL Server?
What is the update command in SQL?
What is a “TRIGGER†in SQL?
What is the need for group functions in SQL?
What are Entities and Relationships?
How many Aggregate functions are available in SQL?
What are the properties of the transaction?
What do you mean by table and field in SQL?
What are the different types of database management systems?