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What is the transpose of a matrix?
Take each row and convert it into a column. The first row becomes the first column, the second row, the second column, etc.
What is relation and representation of relation in database?
In a database, a relation refers to a table that consists of rows and columns, where each row represents a unique record and each column represents a specific attribute of the data. The relationship between different relations (tables) is established through keys, such as primary keys and foreign keys, enabling data integrity and consistency. Representation of a relation typically involves defining its schema, which includes the table name, the attributes, and their data types, allowing for structured data storage and retrieval.
What is meant by a database row What is a tuple?
In database there are no. of records stored in it. These records are stored in table . Row in this table is known as a tuple. So tuple is basically a row.
In a one-to many relationship each row in the first table may be associated with many row in the second table true or false?
true
What are the main characteristics of a relation in DBMS?
In a Database Management System (DBMS), a relation is represented as a table consisting of rows and columns. Each row, or tuple, corresponds to a unique record, while each column, or attribute, represents a specific data field. Relations must adhere to the principles of atomicity, meaning each attribute should hold indivisible values, and they must maintain a unique identifier, usually a primary key, to distinguish each record. Additionally, all entries in a column should be of the same data type, ensuring consistency within the relation.
What is the proper way to set up a data table?
For Excel, it depends on the kind of table you are setting up. You can have a one-input or a two-input table. For a one input you put a set of figures either in a column or a row. You then need a formula for the table to work off. That is put at the top of the empty column that you want data to go into, or the start of the empty row that you want to put data into. Select your formula, the row/column of figures and the blank row/column where data is going to go. You then start the Data Table option. You will be asked for a row input and a column input. If you have your figures in a column, then you put a cell reference into the column input that is in the formula. If they are in a row, then you use the row input. The data fills in then. For a two-input, you will have data in a row and data in a column and a formula in the cell which is above the column and at the start of the row, or the top left cell in the table. You select the row and column with the existing data and the area you want the data to go into. Pick your row and colmn inputs based on the cells in the main formula. Your table will then fill in.
What is a top row of a table is called the?
The top row of a table is called the header row. It typically contains column labels or headings that describe the data in each column below it.
What does transpose mean in computer?
It means to change the layout of data, in terms of its direction. So if data is in a row, transposing it would put into a column. Transposing data in a column will put it into a row. A full table of data can be transposed, not just one row or one column.
What is a database record?
A database record is a row of data in a database table consisting of a single value from each column of data in the table. The data in the columns in a table are all of the same type of data, whereas the rows represent a given instance. Example Table: ========================================================== Column Names: ID FirstName LastName BirthDate ========================================================== 1 George Gray 1/6/1960 2 Thomas Green 2/29/2000 3 Cynthia Black 5/30/1976 ========================================================== For the given table above, an example of a column of data would be FirstName. All the values in that column are first names. An example record (or row) would be the record with ID = 2 which represents the record for Thomas Green and contains each field from that row. Properly designed relational databases use "primary keys" to uniquely identify records in a database. The value (or values) that compose the key must uniquely identify the entire row and only that entire row in that table. That primary key can then appear in another table to represent a relationship between that table and another table. In the example above, the ID column would serve as the primary key for the table.
What is record database?
A database record is a row of data in a database table consisting of a single value from each column of data in the table. The data in the columns in a table are all of the same type of data, whereas the rows represent a given instance. Example Table: ========================================================== Column Names: ID FirstName LastName BirthDate ========================================================== 1 George Gray 1/6/1960 2 Thomas Green 2/29/2000 3 Cynthia Black 5/30/1976 ========================================================== For the given table above, an example of a column of data would be FirstName. All the values in that column are first names. An example record (or row) would be the record with ID = 2 which represents the record for Thomas Green and contains each field from that row. Properly designed relational databases use "primary keys" to uniquely identify records in a database. The value (or values) that compose the key must uniquely identify the entire row and only that entire row in that table. That primary key can then appear in another table to represent a relationship between that table and another table. In the example above, the ID column would serve as the primary key for the table.
The first row of a table used as a data source should contain?
Column Names.
In a table an area that contains text or data for a particular row and column is called a .?
cell
What is the definition column row cell?
In a table, a column is a vertical arrangement of data, a row is a horizontal arrangement, and a cell is formed at the intersection of a column and a row and holds a specific piece of data. Together, columns, rows, and cells organize and display information in a structured format.
What are Column Labels in the areas of a Pivot Table?
Each pivot table is different, so it depends on how you have it laid out and what data is in it. Pivot tables are very flexible, so you can switch around the data and column headings could become row headings and the data can change. Column headings will indicate what the data in a particular column in the pivot table is.
What is a record on a databases?
a record database is all the information about one particullar thing xx xx A database record is all the info dealing with one particular subject A database record is a row of data in a database table consisting of a single value from each column of data in the table. The data in the columns in a table are all of the same type of data, whereas the rows represent a given instance. Example Table: ============================================================================================================== For the given table above, an example of a column of data would be FirstName. All the values in that column are first names. An example record (or row) would be the record with ID = 2 which represents the record for Thomas Green and contains each field from that row. Properly designed relational databases use "primary keys" to uniquely identify records in a database. The value (or values) that compose the key must uniquely identify the entire row and only that entire row in that table. That primary key can then appear in another table to represent a relationship between that table and another table. In the example above, the ID column would serve as the primary key for the table. Read more: What is a database record
What view shows the table data in a row and column format?
Datasheet view
What is table in data base?
A Table is a set of data elements that are organized using a model of vertical columns and horizontal rows. Cell is the intersection of the column and row.
