Suppose A New Tech Startup Wants To Define The Data Model. They Would Then ____.
Is it a special purpose programming language for accessing and manipulating data?
SQL is a programming language used by nearly all relational databases to query, manipulate, and define data, and to provide access control.
Why is an effective ETL process essential to Data Warehousing?
ETL tools break down data silos and make it easy for your data scientists to access and analyze data, and turn it into business intelligence. In short, ETL tools are the first essential step in the data warehousing process that eventually lets you make more informed decisions in less time.
What is a collection integrated and related to a database?
A database – is an integrated collection of logically related records or files. A database consolidates records previously stored in separate files into a common pool of data records that provides data for many applications. The data is managed by systems software called database management systems (DBMS).
What is a collection of fields all related to a single object?
The collection of fields is called records. In a database, a record is a group of fields within a table that are relevant to a specific entity. Records are composed of fields, each of which contains one item of information.
Which is the data manipulation tool that allows you to define report format?
The report generator tools provided by DBMS are used for summarizing the data in a report form which can be used as a decision-making tool for the business authority.
Which one of the following is a type of data manipulation command?
In data manipulation language, commands like select, insert, update, and delete is used to manipulate the information (or data, records), for example, create a table, update table delete table, etc. Therefore the correct answer is C.
Which of the following is a database that manages data from different source systems?
A clinical data repository is a central database that can consolidate clinical data for an individual from different sources.
Which of the following can be used to link the data in two or more tables together?
A foreign key is used to link data together that is contained in more than one table.
What are the 4 main objects of a database?
Access allows you to manage your information in one database file. Within Access, there are four major objects: Tables, Queries, Forms, and Reports.
Which database management subsystem helps you create and maintain the data dictionary and define the structure of the files in a database?
The data definition subsystem helps the user create and maintain the data dictionary and define the structure of the files in a database. The data manipulation subsystem helps the user to add, change, and delete information in a database and query it for valuable information.
How do users access or manipulate data as organized by the appropriate data model in DML?
Data-Manipulation Language: A data-manipulation language (DML) is a language that enables users to access or manipulate data as organized by the appropriate data model. The types of access are Retrieval of information stored in the database. Insertion of new information into the database.
Which extract step of the ETL process describes the relationship between sources and target data?
In the first step of extraction, data is extracted from the source system into the staging area. In the transformation step, the data extracted from the source is cleansed and transformed. Loading data into the target data warehouse is the last step of the ETL process.
Which one of the given functions are used to extract the required data and analyze it from a large pool of data?
Data extraction is the first step in a data ingestion process called ETL — extract, transform, and load. The goal of ETL is to prepare data for analysis or business intelligence (BI).
On which learning method the data mining method is based MCQ?
Unsupervised learning is a type of machine learning algorithm that is specifically designed to identify the abstracted patterns in unlabeled data.
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