SQL and Relation Databases - Reading Assignment

Blockchain Business Course
#161

  1. A row is a data set or a bunch of information for one entity/user/object or whatever.

  2. A column represents an attribute or field of a row which means it is an attribute for one entity/user/object. For most cases a row has more than just one attribute. Columns can be for example (Name, height, age etc.)

  3. A database can have one or more tables. A table contains the data or information which should be stored in the database. It has a unique name and consists of rows and columns.

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#162

  1. A record of a single item in a data set.

  2. a labeled attribute of an item in a data set.

  3. A set of rows and columns.

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#163
  1. Row - a data set representing a single item.
  2. Column - A labeled element of a tuple e. g. “address” or “Date of birth”.
  3. Table - A set of tuples sharing the same attributes; a set of columns and rows.
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#164
  1. A data set representing a single record e.g a name
  2. A column is an attribute of a database record e.g. eye colour
  3. A table is a set of records sharing the same attributes in a form of rows and columns.
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#165
  1. In SQL a row is a data set representing a single item, generally referred to with the term “record”
  2. In SQL a column is a labeled element of a tuple, referred to as “Field”
  3. In SQL a table is a set of tuples sharing the same attributes, represented as a set of columns and rows and referred to as “Relation”
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#166

Row is a record, a data set representing a single item.
2.
Column is an attribute or field, a labeled element of a tuple, for example address or date of birth.
3.
Table is a relation or base relvar. A set of tuples sharing the same attributes; a set of columns and rows.

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#167

1.Row A data set representing a single item

2.Column Attribute or field A labeled element of a tuple, e.g. “Address” or “Date of birth”

3.Table Relation or Base relvar A set of tuples sharing the same attributes; a set of columns and rows

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#168

What is a row? An identificator of the single item

What is a column? A label of the attributed data to each identificator

What is a table? A set of data sharing common labels

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#169
  1. A Row = a record = A dataset reprsenting a single item such as a house or a person.
  2. A column = Atrribute/Field = A labled element of a record or a tuple. Eg Height, DOB, or number of rooms.
  3. A table = Relation/Base relationship variable = A set of rows & columns aka a set of records and attributes - the tuples/records share the same common attributes and are therefore their data is all stored in 1 table
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#170

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

  2. A column is a labeled element of a tuple, eg “Address” “Date of birth”

  3. A table is a set of tuples sharing the same attributes. Basically a set of columns and rows.

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#171
  1. What is a row?
    Record. A data set representing a single item.
  2. What is a column? Attribute or field. A labeled element. A labeled element of a tuple, e.g. “Address” or “Date of birth”.
  3. What is a table?
    Relation or Base relvar. A set of tuples sharing the same attributes; a set of columns and rows.
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#172

Tables

A database table is just that, a table with rows and columns. Different tables contain information about different types of things.

Rows

Each row in a database table represents one instance of the type of object described in that table. A row is also called a record .

Columns

The columns in a table are the set of facts that we keep track of about that type of object. A column is also called an attribute or a field .

#173

NoSQL `
Non-relational
Low cost
Various kinds of NoSQL DB available
Very easy to scale
No need for detailed DB structuring

SQL
Fast
Most common among devs
Atomic transactions
No coding needed

  1. No, since data is most likely going to change regularly, there is no need for a SQL Structure.
  2. No SQL is much better for scaling but has less functionality.
  3. No, SQL Databases are better to keep track of important relationships.
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#174

What is a row?
Its a data set representing a single item
What is a column?
Attributes of the particular data set
What is a table?
Its a collection of rows and column

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#175
  1. A row is a data set representing an item
  2. A column is an attribute or ‘category’
  3. A table is a collection of data sets that share the same type of attribute/category
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#176
  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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#177
  1. A row is a single record.
  2. A column is an attribute of a record referred to as Tuple.
  3. A table is a set of multiple records. A combination or rows and columns.
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#178
  1. What is a row?**

A collection of data from a key item in the database. ex s as age, height, location.

  1. What is a column?

A specific data which is applied in all the rows in the database. For example height only will give back the height data of all the records.

  1. What is a table?

A Table is a collection of rows and columns.

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#179

A row is a data set representing a single item such as a name
A column is a labelled element such as date of birth or age
A table is the collection of all of the data, a set of columns and rows.

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#180

What is a row? Tuple or Record
What is a column? An Attribute
What is a table? set of rows and columns

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