SQL and Relation Databases - Reading Assignment

Blockchain Business Course
#301

A Row is: A data set representing a single item

A Column is: A labeled element of a tuple

A Table is: A set of tuples sharing the same attributes; a set of columns and rows

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#302
  1. What is a row?
  • a single item, a record, represented by a data set.
  1. What is a column?
  • an attribute or field that is a labeled element of a tuple.
  1. What is a table?
    -a set of tuple sharing the same attributes; a set of rows and columns.
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#303

1.What is a row?
-single record
2.What is a column?
labelef record -age,sex and ec.
3.What is a table?
many rows and column,or set of item with shared same attributes

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#304
  • What is a row?
    A data set representing a single item
  • What is a column?
    A labeled element of a tuple, e.g. “Address” or “Date of birth”
  • What is a table?
    A set of tuples sharing the same attributes; a set of columns and rows
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#305

  1. A data set representing a single item.

  2. A labled element of a tuple e.g “Adress” or “Date of birth”.

  3. A set of tuples sharing the same attributes - a set of columns and rows.

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#306

What is a row?
A: A data set representing a single item

What is a column?
A: A labeled element of a tuple, e.g. “Address” or “Date of birth”

What is a table?
A: A set of columns and rows

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#307
  1. Row is a record, a data set representing single item.
  2. Column is a field (tuple)
  3. Table, relation set a tuples sharing same attributes, a set of Rows and Columns
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#308
  1. A single record e.g. a user
  2. its an attribute of a record e.g. age or gender
  3. its a set of records. A set or rows and columns
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#309
  1. row is record
  2. column is attribute
  3. Table is a set of records and attributes
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#310
  1. A Row is a Record which is a piece of data representing as single item.
  2. A Column is a Attribute which is a labeled element such as a Date of Birth or Address
  3. A Table is a Relation which is a set of columns and rows.
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#311

  1. A row is a single item. like the user for example

  2. A column can be information for example address, date of birth, nationality, friends.

  3. A table is when multiple parts match( a set between the row and the column)

(Can someone explain to me what tuple means?)

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#312

In mathematics, a tuple is a finite ordered list of elements. An -tuple is a sequence of elements, where is a non-negative integer. There is only one 0-tuple, an empty sequence, or empty tuple, as it is referred to. An-tuple is defined inductively using the construction of an ordered pair.

A generalization of ordered pairs, such as (-3, 4), and ordered triples, such as (0, -3, 5), in any dimension. An n -tuple is an ordered list of n numbers and can represent a point in n -dimensional space.

In the context of relational databases, a tuple is one record (one row). The information in a database can be thought of as a spreadsheet, with columns (known as fields or attributes) representing different categories of information, and tuples (rows) representing all the information from each field associated with a single record.

In a relational database, a tuple contains all the data for an individual record. For example, in a database containing client contact information, the fields may be categories such as name, phone number, email address and mailing address…

Hope you find this useful.
If you have any more questions, please let us know so we can help you! :slight_smile:

Carlos Z.

#313

Thanks for the feedback. :+1:

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#314

A row is data set representing one item
A column is a labelled element of a tuple, which is a class of rows.
A table is a set of tuples with same characteristics

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#315
  1. a part of a database structure (table) with collection of data of a single instance/item/object. in db terms it is called a “record”
  2. a part of a database structure (table) with data or value of a particular fact about objects in the database. they are also called “attributes”
  3. a collection of rows and columns, kind of a matrix, with information of different items and values of the items properties. it can be queried usually by specifying searching for the value at intersections between specified rows and columns.
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#316
  • What is a row?
    A row is a RECORD set of data representing a single item
  • What is a column?
    A column is refer to as attribute or field which can be a label element e.g date of birth or address
  • What is a table
    Is a set of columns and rows sharing some data together.
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#317
  1. A row is a record, a data set representing a single item
  2. A column is an Attribute or field; a labeled element of a tuple
  3. A table is relation or base relvar; a set of tuples sharing the same attributes; a set of columns and rows
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#318
  1. What is a row? A dataset representing a single item
  2. What is a column? A labelled element of a tuple eg. Address of date of birth
  3. What is a table? A set of tuples sharing the same attributes; a set of columns and rows
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#319
  • What is a row?
  1. Record- a database set representing a single item.
  • What is a column?
  1. Attribute or Field - a labeled element of a tuple, e.g. “Adress” or “date of birth”
  • What is a table?
  1. Relation of base relvar - a set of tuples sharing the same attributes; a set of columns and rows. (Friends of friends on Facebook). (Friends of friends with Similar interests or something alike)
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#320
  1. Every row will contain an item, with a number of features.
  2. In every column you will find an unique feature.
  3. The table contains the relations between items and features.
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