A link between entities
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Relationship
A directory of tables, columns, indexes, and other database objects.
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Catalog (Data Dictionary)
The standard query langauge of relational database systems. A high-level computer
language for storing, manipulating, and retrieving data.
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Structured Query Language (SQL)
A specification of database objects such as tables, columns, data types, and indexes.
Also refers to the process used to develop the specification.
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Database Design
A group of queries that must be either completed or rejected as a whole. Execution
of some, but not all, queries results in inconsistent or incorrect data.
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Transaction
, Implements database requirements in a specific database system. For relational
database systems, it converts entities, relationships, and attributes into tables, keys,
and columns.
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Logical Design Phase
The principle that physical design never affects query results.
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Data Independence
Manipulates data stored in a database
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Data Manipulation Language (DML)
Performed by the query processor to ensure the most efficient instructions are
executed on the data.
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Relationship
A directory of tables, columns, indexes, and other database objects.
,Give this one a try later!
Catalog (Data Dictionary)
The standard query langauge of relational database systems. A high-level computer
language for storing, manipulating, and retrieving data.
Give this one a try later!
Structured Query Language (SQL)
A specification of database objects such as tables, columns, data types, and indexes.
Also refers to the process used to develop the specification.
Give this one a try later!
Database Design
A group of queries that must be either completed or rejected as a whole. Execution
of some, but not all, queries results in inconsistent or incorrect data.
Give this one a try later!
Transaction
, Implements database requirements in a specific database system. For relational
database systems, it converts entities, relationships, and attributes into tables, keys,
and columns.
Give this one a try later!
Logical Design Phase
The principle that physical design never affects query results.
Give this one a try later!
Data Independence
Manipulates data stored in a database
Give this one a try later!
Data Manipulation Language (DML)
Performed by the query processor to ensure the most efficient instructions are
executed on the data.
Give this one a try later!
