Question

Q. Answer the following questions :

1. What are Data types ?

2. What the use of primary key in a table ?

3. State the difference between OLE and hyperlink datatypes ?
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Answer 1

Answer:

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Explanation:

In computer science and computer programming, a data type or simply type is an attribute of data which tells the compiler or interpreter how the programmer intends to use the data. Most programming languages support basic data types of integer numbers, Floating-point numbers, characters and Booleans.

The PRIMARY KEY constraint uniquely identifies each record in a table. Primary keys must contain UNIQUE values, and cannot contain NULL values. A table can have only ONE primary key; and in the table, this primary key can consist of single or multiple columns (fields).

OLE (object linking & embedding) displays the contents of one file in another (i.e. spreadsheet data in a . dwg). ... Hyperlinks are shortcuts to locations (data files, web pages etc.) that allow you to quickly jump to that location.

Answer 2

Explanation:

1. a data type or simply type is an attribute of data which tells the compiler or interpreter how the programmer intends to use the data.

2. The PRIMARY KEY constraint uniquely identifies each record in a table. Primary keys must contain UNIQUE values, and cannot contain NULL values. A table can have only ONE primary key; and in the table, this primary key can consist of single or multiple columns (fields).

3. OLE (object linking & embedding) displays the contents of one file in another (i.e. spreadsheet data in a . dwg). ... Hyperlinks are shortcuts to locations (data files, web pages etc.) that allow you to quickly jump to that location.