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What is the use of dbms?
DataBase Management System (DBMS)is a software package# it allows data to be effectively stored, retrieved and manipulatedand # the data stored in a DBMS packege can be accessed by multiple users and by multiple application programs like (SQL Server, Oracle, Ms-Access) .Types of DBMS# Hierarachical DBMS (HDBMS)# Network DBMS (NDBMS)# Relational DBMS (RDBMS)# Object Oriented DataBase(OODB)# Distributed DBMS (DDBMS)
How does a database work?
There are two kinds of databases. RDBMS and DBMS. Anything which stores data in rows and columns can be called as a database. Even a text file can be a database if it contains data in this format. XML files also can be treated as database. We can query a database using SQL (Structured Query Language) to extract information from a database. This data can be manipulated in different ways to generate reports or use in your software.
What is the economy of scale in DBMS?
A DBMS delivers economy of scale because it is optimized for processing large amounts of data.
Can you write a program in DBMS like C?
DBMS means Data Base Management System, it is not a programming language.
What is class in DBMS?
class in dbms is nothing but a collection of attributes.... class in java is defined as collection of objects....:D
Query execution statistics in query processing in dbms?
create table vino(char name(6));
What is quel in dbms?
quel is a QUEry Language used in relational database
What is query processor in distributed dbms?
The query processor in a distributed DBMS is responsible for receiving and analyzing queries from users or applications, determining how to execute the query across multiple distributed nodes, and coordinating the execution of the query to retrieve the desired data efficiently. It optimizes query performance by considering factors such as data distribution, network latency, and data transfer costs across distributed nodes.
What is subquery in dbms?
A subquery in DBMS is a query nested within another query. It is a way to retrieve data that depends on the result of another query. Subqueries can be used in a variety of ways, such as filtering, joining, or defining a derived table.
What is the main four phases of query processing in dbms?
Query processing can be divided into four main phases: decomposition, optimization, code generation, and execution.
How the user requests for the required data is handled by DBMS explain with the help of example?
In a DBMS, the user requests for data by submitting queries written in a structured query language (SQL). These queries are then processed by the DBMS to locate and retrieve the requested data from the database tables. For example, a user can request all records of employees who work in a specific department by writing a SQL query that specifies the department's name and selects the relevant data fields. The DBMS then executes this query, retrieves the matching data from the database, and presents it to the user.
What are Interactive query facilities?
Interactive query facilities refers to management programs which make it easy to support multiple time-varying attributes at ago. These are used in database programming and ensure that reports are made with minimal data processing.Ê
What are quantifiers in dbms?
Quantifiers in Database Management Systems (DBMS) are keywords used in query languages, such as SQL, to specify the quantity of rows that meet certain conditions. The most common quantifiers are "ALL" and "DISTINCT." "ALL" indicates that the query should consider all matching records, while "DISTINCT" ensures that only unique records are returned in the results. These quantifiers help refine query results and improve data retrieval efficiency.
Why global query optimization is difficult in distributed dbms?
1:parallel execution 2: Additional communication cost 3: Transparency and replication
Which is one of the four main operations of DBMS?
One of the four main operations of a Database Management System (DBMS) is data retrieval. This operation allows users to query the database and extract specific information using structured query languages like SQL. Data retrieval is essential for generating reports, analyzing data, and supporting decision-making processes.
Where can I get more information about Interactive Brokers?
Interactive brokers have a popular online Chanel full of informational videos on the subject. Information on this can also be found at interactivebrokers.com which is the main source for your query.
What are Joins in dbms?
A join is a temporary relationship that you can create between two tables in a database query that do not already have an established relationship or common field with the same fieldname or data type. Database tables that are joined in a query are related in that query only, and nowhere else. The type of join that you use indicates which records the query will select or perform the chosen actions on.
