SQL and Relation Databases - Reading Assignment

Blockchain Business Course
#882

Hello again!

1. What is a row?
A data set representing a single item.
2. What is a column?
A labeled element of a finite ordered list of elements, e.g. “Address” or “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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#883

1. What is a row?
Record - A data set representing a single item

2. What is a column?
Attribute or field - A labeled element of tuple like an “Address” or “Date of Birth”

3. What is a table?
A set of tuples sharing the same attributes.

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#884

  1. What is a row?
    a dataset showing a single item

  2. What is a column?

a labeled element of a tuple

  1. What is a table?

A collection of rows and columns

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#885
  1. A row is a set of data representing a single item, such as a name.
  2. A column represents an ordered list of elements such as address, DOB, height.
  3. A table is made up of both rows and columns.
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#886

  1. one instance in the object described in that table also called a record

  2. fact kept track of within an object also called a field

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#887

1- A row is a data set representing a single intem.
2- A column is a lebeled element of a tuple.
3- A table is a collection of rows and columns.

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#888
  1. A Row is a data set representing a single item, such as the user name.
  2. A column is an attribute, such as height, weight or eye color.
  3. A table is a set of rows and columns that share relations to one another.
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#889
  1. What is a row? A data set representing a single item
  2. What is a column? A labeled element of a tuple, e.g. “Address” or “Date of birth”
  3. What is a table? A set of tuples sharing the same attributes or a set of columns and rows.
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#890
  1. What is a row?
    A dataset representing a single item
  2. What is a column?
    A labeld element of a tulpe e.g. “Address” or “Date of birth”
  3. What is a table?
    A set of tuples sharing the same attributes, a set of colums and rows
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#891
  1. What is a row?
    This is a record in the database.
  2. What is a column?
    This is a field of a record.
  3. What is a table?
    It represents all same types of records containing all information (columns) about them.
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#892
  1. A data set representing a single item
  2. A labeled element of a tuple, e.g. “Address” or “Date of birth”
  3. A set of tuples sharing the same attributes; a set of columns and rows
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#893

  1. What is a row?
    A row is a data set representing a single item

  2. What is a column?
    A column is an attribute like “address” or “Date of Birth”

  3. What is a table?
    A table is set of tuples sharing the same attributes or sets of columns and rows

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#894
  1. A Row is a Record => data set representing a single item
  2. A Column is an Attribute => A labelled element (e.g. “Name”)
  3. A Table is a Relation => A set of column and row
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#895

Hello I have a doubt about what is a Primary key and a Foreign key? I did some research but it is confusing. What I understand is that a Primary Key is the tag used in a column, that’s why it should not be repeated; and a Foreign key is an entire column or a group of them that are linked in some way. It’s that right? Can anybody help me to clarify it?

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#896
  1. What is a row?

A row is the term used in SQL language to refer to a record in a relational database. Also, a row is a data set or collection of data that represent a single value.

  1. What is a column?

A column is the term used in SQL language to refer to an attribute in a relational database. A column is a labeled element of a group of values or tuple.

  1. What is a table?

A table is the term used in SQL language to refer to the relation in a relational database. A table is a set of tuples that share the same attributes and establish a connection between them.

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#897

1 A dataset representing a single item a record
2 an attribute or field, a labeled element about an object
3 A Table is a database…different rows and columns containing information that can be queried

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#898

A data set representing a single item

A labeled element of a single item

A set of records, divided in columns and tuples

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#899
  1. A row is a record of a single item.
  2. A column is a labeled element of an item. e.g. “Address” or Date of Birth"
  3. A table is a set of rows and columns.
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#900
  1. A row is a single entity
  2. A column is a property pertaining to one or multiple rows, eg. “birth date” as a column to a row of “person”.
  3. A table is a collection of rows and columns under one uniform banner, eg. the table “people” will have rows of people with different properties (columns)
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#901
  1. A row is a single record. An employee e.g.
  2. A column is an attribute of a record. Employee`s salary e.g.
  3. A table is a set of records ( set of rows and columns)
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