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1. www.databasestar.com › sql-glossarySQL Glossary of Terms - Database Star

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   Oct 11, 2022 · B-Tree (or B-Tree Index) A b-tree is a type of index in SQL. It is structured like a tree, where the data required is at the leaf and the optimizer starts at the trunk. It uses logic to determine which branches to use to get to the leaf or data that you need. It is the default type of index in many databases.

2. www.sqlshack.com › sql-server-data-dictionary-wantWhat is a SQL Server Data Dictionary and why would I want to ...

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   Dec 26, 2016 · What exactly is a data dictionary? A simple data dictionary is a repository of information about the database, usually in a database itself, that stores object information and attributes, versioned over time. A data dictionary can contain the following information about a particular object: Datetime the current object was created or changed

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   What is SQL Server data dictionary?

   • The SQL Server data dictionary stores information about a database’s definition. The dictionary contains information about database objects such as tables, indexes, columns, datatypes, and views. The SQL Server DBMS uses the data dictionary to execute queries. The data dictionary is kept up-to-date as the database objects are changed.

   What is a SQL Server Data Dictionary? - Essential SQL

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   What is a data dictionary in MySQL?

   • A data dictionary is a collection of metadata (which is data about other data) in the database. It contains information about the relationships to other data, formats, and what it means. It’s stored in Oracle’s SYS schema. MySQL has an information_schema. Queries can be run against tables and views in the data dictionary.

   SQL Glossary of Terms - Database Star

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   Why do we need a data dictionary?

   • Many aspects of metadata, locating new data elements, and reporting/alerting on unusual changes can be built into a data dictionary. Automation allows a majority of the documentation to maintain itself, allowing it to be more accurate, require less manual updating, and be easier to use. What is a data dictionary?

   Building a SQL Server data dictionary - Simple Talk - Redgate Software

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   How do I use a data dictionary?

   • For example, you could query your data dictionary to see the full history of changes for a particular object A data dictionary can be used for version control and auditing purposes, even without using a source control repository, clients or having developers even know changes were being logged.

   What is a SQL Server Data Dictionary and why would I want ... - SQL Sha…

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4. www.sparkcodehub.com › sql-keysExploring SQL Keys: Types, Functions, and Examples

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   In SQL, keys are attributes or combinations of attributes that uniquely identify a row in a table. They enforce entity integrity and establish relationships between tables in a relational database. There are several types of keys in SQL, each serving a specific purpose.

5. www.red-gate.com › simple-talk › databasesBuilding a SQL Server data dictionary - Simple Talk

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   Apr 1, 2021 · In this article, Edward Pollack explains the benefits of a SQL Server data dictionary and how to build one. A data dictionary is a documentation tool that provides metadata, metrics, or details about a database and the data within it.

6. axial-sql.com › understanding-the-sql-server-dataUnderstanding the SQL Server Data Dictionary and How to Use It

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   Feb 27, 2022 · The SQL Server Data Dictionary is a powerful and essential tool for anyone involved in the management and development of SQL Server databases. It offers a clear window into the structure and workings of a database, enabling informed decisions around database architecture, optimization, and security. Through proficient use of the data dictionary ...

7. www.analyticsvidhya.com › blog › 2020Different keys in SQL (Primary Key, Candidate Key, Foreign Key)

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   Apr 22, 2024 · In database management systems, keys play a crucial role in maintaining data integrity and facilitating efficient data retrieval. SQL supports various types of keys, including primary keys, foreign keys, unique keys, candidate keys, and composite keys.

8. www.essentialsql.com › what-is-a-data-dictionaryWhat is a SQL Server Data Dictionary? - Essential SQL

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   Nov 1, 2021 · The dictionary contains information about database objects such as tables, indexes, columns, datatypes, and views. The SQL Server DBMS uses the data dictionary to execute queries. The data dictionary is kept up-to-date as the database objects are changed.