which of the following is a request for specific data from a database?

which of the following is a request for specific data from a database?which of the following is a request for specific data from a database?

which of the following is a request for specific data from a database?

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A(n) ____ is a request for specific data from a database.

That which is a request for specific data from a database is:

  • A database Query

What is a Database Query?

A database query is a request for data from an online source. There are many database queries that are issued on a daily basis.

When people search for certain information on search engines, they are making a database query. When data is inserted and obtained from a source, it can also be classified as a database query.

Q1. ______ is a request for specific data from the database?

Query
Question
Report
None of these

ANSWER: a

Q2. Which of the following is not a valid MS-Access data type? 

Decimal
Date/Time
Number
short text

ANSWER: b

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Q3. _____is a very quick way to build a report if you want to put only a few fields on your report. 

Report tool
Blank Report tool
Both a & b
None of these

ANSWER: a

Q4. Which option is not a wild card? 


?
*
#
None of these

ANSWER: c

Q5. _____ is a field, or combination of fields, that uniquely identifies each record in a table. 


Data type
Form
Relationship
Primary key

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ANSWER: a

Q6. Which option is not available in Query design window? 

1 point
Criteria
Field
Data type

ANSWER: d 


Q7. __ view is used to display data of a table? 

Datasheet View
Design View
Field view
All Of Above

ANSWER: d

which of the following is a request for specific data from a database?
which of the following is a request for specific data from a database?

What is a query?

A query is a question or a request for information expressed in a formal manner. In computer science, a query is essentially the same thing, the only difference is the answer or retrieved information comes from a database.

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What is a database query?

A database query is either an action query or a select query. A select query is one that retrieves data from a database. An action query asks for additional operations on data, such as insertion, updating, deleting or other forms of data manipulation.

This doesn’t mean that users just type in random requests. For a database to understand demands, it must receive a query based on the predefined code. That code is a query language.

What is a query in SQL?

Query languages are used to make queries in a database, and Microsoft Structured Query Language (SQL) is the standard. Note: SQL and MySQL are not the same, as the latter is a software extension that uses SQL. Other language extensions of the language include Oracle SQL and NuoDB.

Although Microsoft’s SQL is the most popular language, there are many other types of databases and languages. These include NoSQL databases and graph databases, Cassandra Query Language (CQL), Data Mining Extensions (DMX), Neo4j Cypher and XQuery.

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How do queries work?

Queries can accomplish a few different tasks. Primarily, queries are used to find specific data by filtering explicit criteria. Queries also help automate data management tasks, summarize data and engage in calculations.

Other examples of queries include append, crosstab, delete, make a table, parameter, totals and updates.

Meanwhile, a query parameter runs variations of a particular query, prompting users to insert a field value and then use that value to create a criterion. Totals queries, on the other hand, allow users to group and summarize data.

which of the following is a request for specific data from a database?
which of the following is a request for specific data from a database?

What is query folding?

For data sources like relational and non-relational databases like Active Directory, OData or Exchange, a mashup engine “translates” from M Language — the data transformation language of Power Query (a data mashup and transformation tool) — to a language understood by the underlying data source. Most often, that language would be SQL.

When complex calculations and transformations are pushed directly to the source, Power Query uses robust relational database engines developed to handle large volumes of data efficiently.

Query folding describes Power Query’s ability to generate a single query statement to retrieve and transform source data. The Power Query mashup engine attempts to accomplish query folding to enhance efficiency whenever possible.

Users can also perform hundreds of different data transformations using Power BI, Microsoft’s business intelligence platform, which builds in Power Query to engage in query folding. Power BI includes tools that aggregate, analyze, visualize and share data.

Web search query

A web search query describes what users search for when they type a question or a word in search engines such as Bing, Google or Yahoo. Search engine queries provide information that is much different from SQL queries, as they don’t require positional parameters or keywords. A search engine query is essentially a request for information on a specific topic.

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Search engines uses an algorithm to search and find the most accurate results to requests. They sort these based on significance and according to the particular search engine — details of which are not revealed publicly.

Types of search queries include navigational, informational and transactional. Navigational searches are intended to find a particular website, such as ESPN.com; informational searches are designed to cover a broad topic, such a comparison between a new iPhone and Android device; and transactional searches seek to complete a transaction, such as the purchase of a new sweater on Amazon.com.

 

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