DATABASE KEY Meaning and
Definition
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A database key is a unique identifier within a database management system (DBMS) that allows for the efficient organization and retrieval of data. It is a field or combination of fields in a database table that uniquely identifies a record or a row. The purpose of a key is to ensure data integrity and enable easy access to specific records.
There are different types of database keys, each serving various functions. A primary key is a unique identifier for each record in a table and is used to enforce data integrity by ensuring that each record is distinct. Foreign keys are a type of database key that establish relationships between tables, ensuring referential integrity. They link a field in one table to a primary key in another table, creating associations across tables.
Additionally, there are composite keys, which are keys that consist of multiple fields. Such keys are used when a single field cannot sufficiently identify a record uniquely. Composite keys create a combination of fields that, when used together, form a unique identifier.
Database keys allow for efficient indexing and querying of data. By creating indexes on key fields, it becomes faster to search for specific records or perform data retrieval operations. The concept of keys is fundamental in relational databases, as it enables the establishment of relationships between tables and ensures the accuracy and integrity of the data stored within them.
Common Misspellings for DATABASE KEY
- satabase key
- xatabase key
- catabase key
- fatabase key
- ratabase key
- eatabase key
- dztabase key
- dstabase key
- dwtabase key
- dqtabase key
- darabase key
- dafabase key
- dagabase key
- dayabase key
- da6abase key
- da5abase key
- datzbase key
- datsbase key
- datwbase key
- datqbase key
Etymology of DATABASE KEY
The term "database key" does not have a specific etymology since it is a compound word made up of two separate terms: "database" and "key".
- The term "database" originates from the Latin word "databasēs", which is a combination of "data" meaning "information" and "base" meaning "foundation". It was first used in the mid-20th century to refer to a structured collection of data.
- The term "key" in the context of databases has its roots in the field of cryptography. It is derived from the Old English word "cǣg" which means "a device used for opening or closing something". In the context of databases, a key is used to uniquely identify records or tuples within a data table.
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