What are the benefits of sorting a table versus using a query to sort records? Which method is more productive? Why?

Q: In a relational database, a select operation may reduce the size of a table by removing columns that…

A: The select procedure simply searches the table's data and acquires or retrieves records according to…

Q: A select procedure in a relational database can shrink a table's size by deleting columns that don't…

A: Definition: In a relational database, data is kept in one or more tables (or "relations") of columns…

Q: Is there a way to cut down on the amount of time it takes to reprogramme views?

A: View controllers: There may be as many sub views in a view controller as there are root views. You…

Q: A view, which is also known as a virtual table, is not an actual table and does not have any data…

A: A VIEW is defined as a data object that does not contain any data. Its resultant is content of a…

Q: 3. CREATE TABLE Employee ( name VARCHAR(), e_id int, mgr_id INT, PRIMARY KEY (e_id) ); CREATE…

A: The SQL queries are given in the below step   We have to use self join of table Employee as Manager…

Q: On what attributes should indexes be defined to speed upthis query? Give the reasons?

A: Actually, given question regarding query.

Q: In a relational database, a select operation is used to delete columns that satisfy specific…

A: The select operation is basically an operation which searches data in the table and acquire or…

Q: What is the utility of a sequence in a database?

A: A sequence is a collection of related data. A sequence can be defined as a set of data in which each…

Q: Removing columns that meet specified criteria is the goal of a select operation in relational…

A: Introduction: Union, intersection, and set difference are the three main relational set operations.…

Q: How are NULL values included in a new record being added to a table?

A: NULL values included in a new record being added to a table:

Q: Why is it necessary to apply the normalization process to the tables created according to your…

A: Lets see the solution.

Q: A foreign key in a table (a) may not be composed of a single element (b) Should, in turn, be…

A: Answer : The Given MCQ Answer is option D) must belong to the primary key of the table in which it…

Q: 2. Write a MySQL query to fetch records that are present in one table but not in another table.…

A: Q 2. Write a MySQL query to fetch records that are present in one table but not in another table.…

Q: __________ is a contiguous group of blocks allocated for use as part of a table, index, and so…

A: Task :- choose the correct option for given question.

Q: A table in third normal form is one which: A Has only one primary key. B Is linked to another table…

A: A table is in 3NF (third normal form) if the table is in 2NF and there is no transitive dependency…

Q: What does the term "transitive" mean? What is the rule for converting tables in the second normal…

A: Given question has asked to :- i) Write down the normalised form. ii) Identify the repeating group…

Q: A single value in a database record is called a(n) O table O schema O field O records O key

A: Table  it is a large collection of data sored in a row and column format (as matrix) where rows is…

Q: How did we find the total number of records in the database?  (500000 million records) How we did…

A: Answer: We have write command for find the total number of record in the table

Q: write SQL statements for given questions in order to get familiar to basic SQL data manipulation…

A: The query can be compiled either in MySQL or SQL as the query used will be SQL. The first 3 queries…

Q: A table schema field record is a record in a database that contains a single piece of information. O…

A: Given: A table is a big collection of data organized in a row and column manner (as a matrix), where…

Q: Explain the Best Practices while importing tables from MySQL or any other databases using Sqoop?

A: Introduction: Sqoop is a simple tool that may be used to import relational data into Hadoop systems.…

Q: What uniquely identifies a row in a table? a. Index b. Column c. Primary key…

A: • Each single table row or multiple tables is identified by a single key (relational).

Q: hy index should not be created for every column of every table of

A: Required: Why index should not be created for every column of every table of database.

Q: In the process of deleting rows, columns, and tables, what is an important point to bear in mind is

A: Introduction: Database management systems are created to keep records of numerous linked entities…

Q: Every record in a table must contain at least a unique field called primary key.

A: Will be explained:

Q: Is there a purpose for many fact taBles, and how do they function?

A: The central table in the star schema/snowflake schema of a data warehouse is called the fact table.…

Q: what is joining two tables using an ID

A: INTRODUCTION: Here we need to tell what is joining two tables using an ID.

Q: When it comes to database systems, tables are a great option. Is it possible for you to write a few…

A: Answer: A null value in a relational database is involved when the value in a column is obscure or…

Q: A table in third normal form is one which: A Has only one primary key. B Is linked to another table…

A: A  database is in third normal form if it: is already in second normal form it has no non-key…

Q: Clause of SELECT

A: The SELECT statement

Q: Using the film database you have, answer the following queries in your schema then write them down…

A: Answer: I have done code  and also I have attached code as well as code screenshot.

Q: ENROLLMENT StudentID StudentName MajorID MajorName 111 Joe E English 222 Bob History 333 Lisa H…

A: Option 1, None of the above

Q: What is a view? How can they be used?

A: A view can be considered of as a virtual table that gets its data from one or more table columns.…

Q: Q2\ design a data base in name A then create a table in name students that has Five column…

A: All queries  follow:   1.create the database: syntax:  CREATE DATABASE  A ;   2. create a table with…

Q: Explain why it is necessary to limit the kinds of updates performed on data when referencing data…

A: Update limitations on data Owner may grant update permissions to various users of the database. But…

Q: What is the significance of a foreign key in a database? Please offer an example of why this is…

A: The significance of a foreign key in a database

Q: What is one critical point to remember while removing rows, columns, and tables?

A: When Ethernet was first introduced, Originally using coaxial cable as a transmission medium,…

Q: A view is updatable when it is derived from joining two base tables on the _________ command

A: Given:   A view is updatable when it is derived from joining two base tables on the _________…

Q: A select operation in a relational database reduces the size of a table by removing columns that…

A: The question is on relational databases and finding if the statement is true or false.

Q: What is an important caution to keep in mind when deleting rows, columns, and tables?

A: A database management system is developed to keep records of various related entities together in an…

Q: What are the benefits of using a table in a database? write a brief remark regarding the value NULL?

A: Answer. Some advantages of Table in databases are listed below: By using the table, we can easily…

Q: 1 Context  write SQL statements for given questions in order to get familiar to basic

A: AS PER OUR GUIDELINES WE ARE SUPPOSED TO ANSWER ONLY 3 SUB-PARTS IF THERE ARE MULTIPLE SUB-PARTS…

Q: The usage of indices speeds up query processing, but it's typically a bad idea to create one for…

A: Introduction: Indexing in a Database Management System (DBMS): Indexing is a time-saving way of…

Q: Which of the following is NOT an advantage of normalization? a) Multi-table queries run faster b)…

A: Normalization means dividing the tables in order to reduce the redundancy present in the table.…

Q: Explain the problems that unnormalized tables have for insert, update, and delete actions

A: Problems that unnormalized tables have for insert, update, and delete actions are:

Q: The elements in a linear table can be various, but the data elements in the same linear table have…

A: You can tell if a table is linear by looking at how X and Y change. If, as X increases by 1, Y…

Q: When deleting rows, columns, and tables, what is the most important thing to remember?

A: A database is a collection of data that is organized to make it easier to find, update, and…

SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.