Practical SQL Query Interview Questions (SQL Server Queries examples with answers) In this part, we will see SQL practice questions which contain both complex SQL queries interview questions and basic SQL Interview Questions. Let’s see important SQL queries for interview 76. How to get unique rec...
Correlated Subquery: References data from the outer query in its WHERE clause. Nested Subquery: This can be placed anywhere in the outer query and does not directly reference the outer table. Advanced SQL Interview Questions for Experienced 18. What is a function in SQL, and why do we use...
The following query shows the maximum and minimum marks of the Stu_Marks column from the Student table: SELECTMAX(Stu_Marks),MIN(Stu_Marks)FROMStudent; Query 5: Write a query to access the first record from the SQL table? Sol: Syntax to find the first record from the table: ADVERTISEMENT...
A query, in SQL, is a command used to request data or update information from a database table or combination of tables. Users can write and execute queries to retrieve, delete or update information in a database. Usually, a query response returns data from different tables within the data...
SQL Job Interview Questions and Answers 1:: What is SQL (Structured Query Language)? SQL is an English like language consisting of commands to store, retrieve, maintain & regulate access to your database. Read More 2:: What is the SQL*Plus?
The heap table can be identified by querying thesys.partitionssystem object that has one row per each partition with index_id value equal to 0. You can also query thesys.indexessystem object also to show the heap table index details, that shows, the id of that index is 0 and the type...
SQL stands for Structured Query Language , and it is used to communicate with the Database. This is a standard language used to perform tasks such as retrieval, updation, insertion and deletion of data from a database. 7. What is a unique key?
Here, <cursor_name> is the name assigned to the cursor and SELECT statement is the query that returns rows to the cursor active set. Open the cursor Syntax:OPEN <cursor_nam>; Where, <cursor_name> is the name of the previously defined cursor. ...
SQL Server Interview Questions and Answers for Freshers 1. Compare SQL Server with Oracle.dsj 2. How can SQL Server instances be hidden? To hide aSQL Server instance, we need to make a change in SQL Server Configuration Manager. To do this, we have to follow the below steps: ...
A SELF JOIN is used to join a table with itself. This join can be performed using table aliases, which allow us to avoid repeating the same table name in a single sentence. It will throw an error if we use the same table name more than once in a single query without using table ali...