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Keywords:
Null,
Unique,
Column,
Row,
Constraint
The Primary Key ensures that no two records in a database contain the same value for that field. It is the field that uniquely identifies the record.
A key that uniquely identifies each record in a relational table.
The column or set of columns included in the definition of a table's PRIMARY KEY constraint. A primary key's values uniquely identify the rows in a table. Only one primary key can be defined for each table. See Also: PRIMARY KEY constraint
A primary key designate an object that is implemented within the kernel. See "Gate key".
One or more columns used to uniquely identify a row of a table.
A specific field in a database table that uniquely identifies the records in that table.
A field, or fields, used to uniquely identify a field.
a unique identifier composed of one or more attributes.
One or more columns whose values uniquely identify every row in a table. Normally an index always exists on the primary key.
One or more fields whose value or values uniquely identify each record in a table. In a relationship, a primary key is used to refer to specific records in one table from another table. A primary key is called a foreign key when it is referred to from another table. You can have only one primary key. An Employees table, for example, could use the social security number for the primary key. .
The information in a database column or columns that constitutes a unique entry for each row in the database table.
One or more columns (fields) in a table that will uniquely identify a record. Each table should have a primary key because: A primary key is an index When inputting data, Access prevents duplicate entries in the primary key field Unless you tell it otherwise, Access will display your data in the order of the primary key
A unique key that is part of the definition of a table. A primary key is the default parent key of a referential constraint definition.
this is a unique key that's chosen to identify uniquely each record in a table and serve as foreign key in dependant tables. It may be composed or one or more fields. In IB, when you declare a PK, the underlying index is created automatically and it always is in ascending order.
Each data table in you web application contains column called the primary key. This column uniquely identifies each record in the data table. By default the primary key of a table is an auto-incrementing integer field. However, you can change the primary key to a field of a different data type if you wish.
Refers to the column(s) on a relational table that uniquely define a row of data on that table.
a candidate key selected by the database designer as the means to identify a row in a table
a candidate key (there may be several) chosen by the DB designer to identify entities in an entity set
a column in your table that will uniquely identify every row in the table
a column or columns in a table whose values uniquely identify each row in a table
a column or combination of columns that uniquely identify each record in a table
a column, or group of columns, that can uniquely identify a single row in the table
a column, or set of columns, in a table that uniquely identifies a single record
a column or set of columns that contains a non-null unique value for each row in a table
a column or set of columns that uniquely idenifies the rest of the data in any given row
a column or set of columns that uniquely identifies the rest of thedata in any given row
a constraint, it forces the data to be unique
a constraint on the contents of a table
a data element or a combination of data elements in a table which uniquely identify(ies) a row of information
a field in a database table that is guaranteed to uniquely identify a record in the table
a field in a table that uniquely identifies a record
a field in the table that Access can use to identify each field uniquely
a field or a combination of fields that uniquely identifies a
a field, or a series of fields, that allows to differentiate a recording of the others
a field, or collection of fields, whose values uniquely identify each record in a table
a field or combination of fields in a database table that uniquely identifies each record in the table
a field or combination of fields used to identify a specific row
a field or group of fields that unambigously identifies a specific record within a table
a field or group of fields that uniquely identifies that row
a field that can reveal records for tables
a field that identifies each record in your table as unique
a field that links all the data within a record to a corresponding value
a field that stores a unique value for each field in that table
a field whose value must be unique for each record
a key that uniquely identifies a tuple
a logical construction -- it is not a Row Id, for example -- and has nothing to do with they physical arrangement of data on disk
an attribute (or combination of attributes) that uniquely identify each instance of an entity
an attribute or group of attributes that uniquely identifies a row in a table
an attribute that uniquely identifies this type of the object
an entity attribute that uniquely identifies each instance of an entity from other instances
an object that uniquely identifies an entity bean according to the bean type, home interface, and container context from which it is used
a non-null unique identifier for a row, a composite key is a collection of fields that give you a non-null unique identifies
a non-null value field from your database
an unique KEY with the extra constraint that all key columns must be defined as NOT NULL
a part of a row/element which is unique - it cannot be duplicated for any other row
a property given to a table column that distinguishes that record apart from each
a required field and, as such, must have data entered into it
a set of attributes whose values should be unique within If they do, the constraint will not be added
a set of columns from a table that are guaranteed to have unique values for each row of that table
a set of columns in a table that together uniquely identify a row
a single column or else a combination of columns that is used to uniquely identify rows in a table of a relational database
a single constraint that enforces both a) uniqueness b) not null for all columns in the constraint
a special case of a unique key
a special index that helps you reference a specific record in your table
a special key that can be defined only once in a table
a special type of constraint (or restriction) which makes sure that all the values are unique and without nulls (you can forget about indexing in XML here)
a special type of unique constraint
a type of index that's similar to a UNIQUE index
a unique column or set of columns that defines the rows in the database table
a unique identifier for a record (remember a record will consist of one or more fields/columns)
a unique identifier for the record
a unique index where all
a unique number for that specific record or row of data
a unique-valued index that's similar to a UNIQUE index but has additional restrictions (the major one being that no NULL values are allowed)
a unique value used to identify a record in a table
One or more columns that uniquely identify a row in a table.
Attributes used to uniquely identify a row in a table.
The attribute or attributes used as the primary and unique index key for an entity. Primary storage Storing data and instructions in a computer’s ROM and RAM. See ‘Storage devices’.
The central item or column within an RDBMS that contains a unique value for each record in the database, such as the unique number assigned to each parcel within a country.
A column in a database table whose members consist of unique values that can be used to identify a row in a table.
A primary key is one or more table columns whose values uniquely identify each record in a table. In general, a primary key is defined on a single column, but it is not uncommon to have it defined on two columns.
LDM: The attribute or set of attributes that uniquely identify each instance in an entity. Notation is PK. PDM: The column or set of columns that are used to establish the physical storage location of the row. NOTE: This is the generally used term in the industry, but is incorrect for Teradata. In Teradata, this is called the Primary Index (PI) specifically to differentiate it from the logical modeling term PK, since it may in fact be made of attributes other than the ones defined for the PK in the LDM and may not be unique.
see Key field
(RM,TM) The SK set of attributes that the designer picks as the unique identifier for a database table. tables.php
A field that contains a unique and constant value for each record and can therefore be used as the common field in linked tables.
A column or set of columns that identify a particular row in a table.
The column or combination of columns that uniquely identify a row.
A column, or combination of columns, within a table whose values together form the "principal unique identifier" of rows in that table. In other words, a table's primary key serves to uniquely identify row in that table.
A column in a database table consisting of unique values that can be used to identify rows in a table.
A column or combination of columns that uniquely identifies a row in a table. It cannot allow null values and must always have a unique index. A primary key is used to relate a table to foreign keys in other tables.
field or combination of fields in a database table that have a unique value. It is used to identify a record. See foreign key, relationship.
An attribute selected to act as the unique identifier for each occurrence of an entity or relationship. A primary key must be unique, stable, minimal and non-null under all conditions.
An object that uniquely identifies an entity bean within a home.
A column or list of columns whose values uniquely identify every row in the table. See also foreign key.
a field or combination of fields, which are unique for every record in the table.
A column or combination of columns whose values uniquely identify a row or record in the table. The primary key(s) will have a unique value for each record or row in the table.
Column or combination of columns whose values uniquely identify a row in a table. OR it is the attribute or group of attributes selected from the candidate keys as the most suitable to uniquely identify each instance of an Entity. In choosing the primary key it should be efficient, it must not contain any null parts, its values must remain static, and it should be a data element in your control.
A unique identification.
The column or columns whose data uniquely identify each row in a table.
In a sorted table, the main column of values by which the table is sorted.
(P) - These keep duplicate entries for the field that is a record's primary key. The unique key allows records (tuple or row) to be found easily. Assumed NOT NULL.
A field in a database table that is uniquely different for each record in the table.
The key selected as being most important for identifying a body of information (an entity, object or record). Source: Foldoc: Free On-line Dictionary of Computing
The field (or fields) that uniquely identify a record in a table. You cannot have duplicate primary keys within a table.
An attribute in an entity that uniquely identifies rows of that entity. For example, the Employee entity can contain an empID attribute that uniquely identifies each employee.
One or more attributes whose values uniquely identify a row in a database table.
A set of one or more columns in a database table whose values, in combination, are required to be unique within the table.
A column or set of columns in one table that uniquely identifies each row in the table. Each row in a table has a value in the primary key different from that of every other row in that table.
n. a key, which operates the ignition, lock on a vehicle. It may or may not also operate some or all the other locks on the vehicle.
The field in a database table that uniquely describes each record. For example, the primary key in a database table of employees might be the employee number. Also known as the key field.
A field that uniquely identifies a record in a table.
The columns in a table that uniquely identify the rows in the table.
A column (or multiple columns) in a table that ensures that a record can be uniquely identified.
The information from a column or set of columns that uniquely identifies each row in a table. The primary key is sometimes called a unique key.
column in a table whose values uniquely identify the rows in the table primary key value cannot be NULL. Also see candidate key.
An IPSec key responsible for creating a security association. Values can be set in time or data size.
One or more fields (columns) whose values uniquely identify each record in a table. A primary key cannot allow Null values and must always have a unique index. A primary key is used to relate a table to foreign keys in other tables. ኣá‹áˆ« መለለዠView
On OpenVMS systems, the required key within the data records of an indexed file. This key is used to determine the placement of records within the file and to build the primary index.
In database design, 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).
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