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https://ask.libreoffice.org/en/question/24945/database-does-not-support-relations-joins-and-relationships-in-base-is-it-possible/
Database does not support relations - Joins and relationships in Base - is it possible? [closed] edit. joins. relationships. ... arabic language support [closed] Are there any new applications planned for Libre Office in the near future? One note or an Outlook competitor perhaps? [closed]
https://ask.libreoffice.org/en/question/86872/base-the-database-does-not-support-relations/
And unlike MS Access the relationship editor when used w/ MySQL/MariaDB only appears to work with InnoDB database engine databases (i.e. it won't work with ISAM databases.) In other words it does not allow table-to-table relationships to be set up unless there is underlying relationship support in the database engine.
https://en.wikipedia.org/wiki/Relational_databases
A relational database is a digital database based on the relational model of data, as proposed by E. F. Codd in 1970. A software system used to maintain relational databases is a relational database management system (RDBMS). Many relational database systems have an option of using the SQL (Structured Query Language) for querying and maintaining the database.
https://stackoverflow.com/questions/1538645/does-sql-azure-support-relational-databases
You may be getting confused with the old "SQL Server Data Services" (now Azure Table Storage) - which indeed does not support relational databases. Developer feedback that this was unnacceptable led to the introduction of the fully relational SQL Azure.
https://stackoverflow.com/questions/4255895/why-googles-bigtable-referred-as-a-nosql-database
NoSQL databases usually don't support relations, because they don't support the consistency to enforce these relations. Also, relational data is bad for performance when the data is distributed across several servers. An exception are graph databases. These are considered NoSQL databases, but …
https://support.office.com/en-gb/article/Guide-to-table-relationships-30446197-4fbe-457b-b992-2f6fb812b58f
On the Database Tools tab, in the Relationships group, click Relationships. If the database contains relationships, the Relationships window appears. If the database does not contain any relationships and you are opening the Relationships window for the first time, the Show Table dialog box appears. Click Close to close the dialog box.
https://www.chegg.com/homework-help/fundamentals-of-database-systems-7th-edition-chapter-6-solutions-9780133970777
Hence, in general, an SQL table is not a set of tuples, because a set does not allow two identical members; rather, it is a multiset of tuples. Some SQL relations are constrained to be sets because a key constraint has been declared or because of DISTINCT option has been used in SELECT statement.
https://www.lifewire.com/database-relationships-p2-1019758
Nov 19, 2019 · Establishing consistent relationships between database tables helps ensure data integrity, contributing to database normalization. For example, what if we did not link any tables through a foreign key and instead just combined the data in the Courses and Teachers tables, like so:
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