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SQL Past Questions

SQL Past Questions. Are you preparing for the SQL examination that is fast approaching? To succeed in this examination you must be well acquainted and familiar with certain strategies to attain maximum success.

Firstly, what is SQL?


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SQL stands for Structured Query Language is a domain-specific programming language for managing the data in Database Management Systems. SQL programming skills are highly desirable and required in the market, as there is massive use of Database Management Systems (DBMS) in almost every software application. In order to get a job, candidates need to crack the interview in which they are asked various SQL interview questions.

The best ways to crack this tough nut is by using past questions and answers. By using past questions and answers you are studying smart and not studying too hard. The route is simple and it is the easiest for all candidate who plan to achieve success.

These are the most common and useful SQL interview questions for freshers as well as experienced candidates. Basics to advanced concepts of SQL are covered in this article.

Free Nnpc Past Questions and Answers PDF

Following is a curated list of SQL questions for interview with answers, which are likely to be asked during the SQL interview. Candidates are likely to be asked SQL basic interview questions to advance level SQL interview questions for 3 years experience professionals, depending on their experience and various other factors. The below list covers all the SQL technical interview questions for freshers as well as SQL server interview questions for experienced level candidates and some SQL query interview questions.

Why you need SQL Past Questions

It’s good to get yourself familiarized with past papers so you know how everything is laid out and on exam day you don’t stress out over it.

Once you’ve done a couple of past papers you know the layout of the questions. Generally, the paper will start with lower mark questions and work up, but it’s good to know so that you don’t write an essay long answer for a 2 mark question and not have enough time for a 10 mark question later in the paper.

How is SQL Past Questions Pattern?

SQL Past Questions and Answers are pattern in a multiple-choice question pattern. We have made it very easy for you. We bring all the questions for many years and put them together in the order of it occurrence. We provide the correct answers in order to save your time.

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Sample of SQL Past Questions

1. What is DBMS?

A Database Management System (DBMS) is a program that controls creation, maintenance and use of a database. DBMS can be termed as File Manager that manages data in a database rather than saving it in file systems.

2. What is RDBMS?

RDBMS stands for Relational Database Management System. RDBMS store the data into the collection of tables, which is related by common fields between the columns of the table. It also provides relational operators to manipulate the data stored into the tables.

Example: SQL Server.

3. What is SQL?

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.
Standard SQL Commands are Select.

4. What is a Database?

Database is nothing but an organized form of data for easy access, storing, retrieval and managing of data. This is also known as structured form of data which can be accessed in many ways.

Example: School Management Database, Bank Management Database.

5. What are tables and Fields?

A table is a set of data that are organized in a model with Columns and Rows. Columns can be categorized as vertical, and Rows are horizontal. A table has specified number of column called fields but can have any number of rows which is called record.

Example:.

Table: Employee.

Field: Emp ID, Emp Name, Date of Birth.

Data: 201456, David, 11/15/1960.

6. What is a primary key?

A primary key is a combination of fields which uniquely specify a row. This is a special kind of unique key, and it has implicit NOT NULL constraint. It means, Primary key values cannot be NULL.

7. What is a unique key?

A Unique key constraint uniquely identified each record in the database. This provides uniqueness for the column or set of columns.

A Primary key constraint has automatic unique constraint defined on it. But not, in the case of Unique Key.

There can be many unique constraint defined per table, but only one Primary key constraint defined per table.

8. What is a foreign key?

A foreign key is one table which can be related to the primary key of another table. Relationship needs to be created between two tables by referencing foreign key with the primary key of another table.

9. What is a join?

This is a keyword used to query data from more tables based on the relationship between the fields of the tables. Keys play a major role when JOINs are used.

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Each year, thousands of students gain admission into their schools of choice with the help of our past questions and answers.

7 Tips to Prepare for SQL Exams

  1. Don’t make reading your hobby: A lot of people put reading as a hobby in their CV, they might be right because they have finished schooling. But “You” are still schooling, so reading should be in top priority and not as a hobby. Read far and wide to enhance your level of aptitude
  2. Get Exams Preparation Materials: These involve textbooks, dictionaries, SQL Past Questions and Answers. These materials will enhance your mastering of the scope of the exams you are expecting.
  3. Attend Extramural Classes: Register and attend extramural classes at your location. This class will not only help you refresh your memory but will boast your classroom understanding and discoveries of new knowledge.
  4. Sleep when you feel like: When you are preparing for any exams, sleeping is very important because it helps in the consolidation of memory. Caution: Only sleep when you feel like it and don’t oversleep.
  5. Make sure you are healthy: Sickness can cause excessive feelings of tiredness and fatigue and will not allow you to concentrate on reading. If you are feeling as if you are not well, report to your parent, a nurse or a doctor. Make sure you are well.
  6. Eat when you feel like: During the exam preparation period, you are advised not to overeat, so as to avoid sleep. You need to eat little and light food whenever you feel like eating. Eat more of fruits, drink milk and glucose. This will help you to enhance retention.
  7. Reduce your time in social media: Some people live their entire life on Facebook, Twitter, WhatsApp, Messenger chat. This is so bad and catastrophic if you are preparing for exams. Try and reduce your time spent on social media during this time. Maybe after the exams, you can go back and sleep in it.

If you like these tips, consider sharing them with your friends and relatives. Do you have a question or comments? Put it on the comment form below. We will be pleased to hear from you and help you to score as high as possible.

We wish you good luck!!!

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