Αποτελέσματα Αναζήτησης
21 Μαρ 2011 · Oracle Database enforces a UNIQUE key or PRIMARY KEY integrity constraint on a table by creating a unique index on the unique key or primary key. This index is automatically created by the database when the constraint is enabled.
13 Σεπ 2024 · This blog will delve into two crucial types of keys: primary keys, which uniquely identify records, and index keys, designed to enhance query speed. Understanding these keys is essential for anyone looking to master database management and learn how to choose db index keys effectively.
25 Δεκ 2020 · Database indexes are critical to query speed and efficiency. Learn when, why, and how to use them – and when not to – in this post. Indexes are very important database objects; they optimize data access and improve database performance by helping the database execute SQL queries faster.
16 Απρ 2019 · In simple terminology, an index maps search keys to corresponding data on disk by using different in-memory & on-disk data structures. Index is used to quicken the search by reducing the number of records to search for.
25 Οκτ 2023 · In this comprehensive guide, we’ve explored the concept of unique keys, how to implement them through SQL constraints, their relationship with indexes, and how to add or remove unique key ...
Access Control for Databases - Concepts and Systems provides a comprehensive survey of the foundational models and recent research trends in access control models and mechanisms for database management systems.
17 Ιουλ 2024 · Understanding the practical applications of primary keys and indexes can significantly enhance your database management strategies. Here, we delve into real-world examples within the TiDB database to illustrate their effectiveness.
