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a key is important in a database because using of that key only we can identify a unique attribute.
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∙ 12y ago
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Can you insert primary key only to one field in the database?
Yes. Primary key can be inserted to one field in the database. The field should be unique and not null.
What is concatenate key in a relational database?
The concatenate key is simply the combination of several columns in a table, which serves the unique key of that table.
Why choosing the correct field in database is important?
Choosing the correct field in database is very important. It is because the correct field can give you the correct value.
What are the key relationships between data warehouse and data mining?
Data warehouse is the database on which we apply data mining.
All types of keys in database?
* Alternate key - An alternate key is any candidate key which is not selected to be the primary key * Candidate key - A candidate key is a field or combination of fields that can act as a primary key field for that table to uniquely identify each record in that table. * Compound key - compound key (also called a composite key or concatenated key) is a key that consists of 2 or more attributes. * Primary key - a primary key is a value that can be used to identify a unique row in a table. Attributes are associated with it. Examples of primary keys are Social Security numbers (associated to a specific person) or ISBNs (associated to a specific book). In the relational model of data, a primary key is a candidate key chosen as the main method of uniquely identifying a tuple in a relation. * Superkey - A superkey is defined in the relational model as a set of attributes of a relation variable (relvar) for which it holds that in all relations assigned to that variable there are no two distinct tuples (rows) that have the same values for the attributes in this set. Equivalently a superkey can also be defined as a set of attributes of a relvar upon which all attributes of the relvar are functionally dependent. * Foreign key - a foreign key (FK) is a field or group of fields in a database record that points to a key field or group of fields forming a key of another database record in some (usually different) table. Usually a foreign key in one table refers to the primary key (PK) of another table. This way references can be made to link information together and it is an essential part of database normalization
Why are entity integrity and referential integrity important in a database?
It's the key to correct data being entered in the database. It's the rules that govern what can be inserted and what cannot.
What is the primary key field of a database?
its a unique key use to identify data in database
What is a key field in database?
i key field is a field with with a key in the middle :)
What software has the use of queries and reports as key functions?
database
Types of keys?
There are many keys in database each having particular use. Types of keys in database are : Primary key, candidate key, alternate key, foreign key, surrogate key.
Why each is considered important?
It's the key to correct data being entered in the database. It's the rules that govern what can be inserted and what cannot.
Why does your MS Access icon look like a record?
Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.Access is a database. Records are what each set of data is, so they are a key aspect of Access and any database. So that is why the icon is like it is.
Why are forms an important part of a database?
the function of the database
What is a function of a key in a database?
keyboard hehehe
What is the key fields in a database?
what is a Absolute reference
When a primary key is begging assigned by the database automatically it is called?
autonumber key
What is meant by key in database?
A key is a unique part of the record that is used to index.
