In this tutorial, we shall go through the basic and yet most frequently asked SQL Interview Questions.
Table of contents
- SQL Interview Questions
- Q1 - What do you mean by Data, DataBase and DataBase Management Systems?
- Q2 - What is the difference between SQL and SQL server?
- Q3 - What is the difference between DBMS and RDBMS?
- Q4 - What is a key and what are different types of keys?
- Q5 - What is the basic difference between DELETE, DROP and TRUNCATE commands?
- Q6 - Which query is used to rename a column in a particular table?
- Q7 - What are the specifying attribute constraints and attribute defaults in SQL?
- Q8 - What is the built-in-function to count the total number of record in the table?
- Q9 - Which query is used to display the current date(today’s) date in the system?
- Q10 - What are set operations in SQL?
- Q11 - What is a join clause and what are the types of joins in SQL?
- Q12 - What do we need PL/SQL even though we haveSQL?
- Q13 - What is a cursor?
- Q14 - What are cursor attributes?
- Q15 - What do you mean by triggers?
- Q16 - What is normalization and what are different normal forms?
- Q17 - When do we call a table is in first normal form?
- Q18 - When do we call a table is in second normal form?
- Q19 - When do we call a table is in third normal form?
- Q20 - When do we calla table is in Boyce and Codd Normal Form (BCNF)?
- Q21 - When do we call a table is in Fourth Normal Form (4NF)?
- Q22 - Why do we need indexing?
- Q23 - What is a relationship and what are they?
- Q24 - What are all the different types of indexes?
- Q25 - What is a Stored Procedure?
- Q26 - What is Data Integrity?
- Q27 - What are aggregate and scalar functions?
- Q28 - How do you create an empty table from an existing table?
- Q29 - How to select unique records from a table?
- Q30 - Which operator is used in the query for pattern matching?
- Q31 - What do you mean by DDL, DML, and DCL in SQL?
- Q32 - Explain set operations in SQL?
- Q33 - What is Collation?
- Q34 - Explain the working of SQL Privileges?
- Q35 - What are Nested Triggers?
- Q36 - What is the difference between UNIQUE and PRIMARY KEY constraints?
- Q37 - What do you mean by SQL Injection?
- Q38 - Write an SQL Query to find the name of students whose name Start with ‘M’?
- Q39 - Write an SQL Query to display the current data?
- Q40 - What is the difference between the WHERE and HAVING clause?
- Q41 - Write a query to find a duplicate record in one field and also find the duplicate record with more than one field?
- Q42 - How do we use DISTINCT statement? What is its use?
- Q43 - What is the difference between nested subqueries and correlated nested subqueries?
- Q44 - How can you save all changes made by DML statements?
- Q45 - How can you undo the transactions that have not already been saved to the database?
- Q46 - Is NULL value same as blank space or zero?
- Q47 - What is the difference between IN and BETWEEN operator in SQL?
- Q48 - Do the views have data in the table?
- Q49 - What is the difference between GROUP BY and ORDER BY statements?
- Q50 - How will you find the name of the student with the third largest mark in a class?
- Q51 - What is the difference between primary key and unique constraints?
- Q52 - What are the desirable properties of transactions?
- Q53 - What are clustered and non-clustered Indexes?
- Q54 - When an explicit cursor needed?
- Q55 - What are the advantages of Views?
- Q56 - What is AutoIncrement?
- Q57 - What are the advantages and disadvantages of a Stored Procedure?
- Q58 - What is the difference between Rename and Alias?
- Q59 - What is the order of SQL SELECT?
- Q60 - What is the SQL CASE statement?
| Pages : | 17 |
| Size : | 0.2 MB |
| Downloads: | 128 |
| Created: | 2022-07-02 |
| License: | Free |
| Author(s): | tutorialkart.com |
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