Tag relational-theory - Это страница 2 - GeneraCodice

One and only one relationship - ER diagram to relational schema

https://www.generacodice.com/ru/articolo/3208220/one-and-only-one-relationship-er-diagram-to-relational-schema
  database-design  -  erd  -  relational-theory
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Multiple Primary-Foreign Key connections between Tables Redundant?

https://www.generacodice.com/ru/articolo/3206361/multiple-primary-foreign-key-connections-between-tables-redundant
  rdbms  -  erd  -  primary-key  -  relational-theory  -  foreign-key
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In what cases is using ClickHouseDb and the like a neccessity?

https://www.generacodice.com/ru/articolo/3188764/in-what-cases-is-using-clickhousedb-and-the-like-a-neccessity
  postgresql  -  relational-theory  -  time-series-database  -  clickhouse
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How to store a (record which holds a) reference to any other column (attribute) in another table (relation)

https://www.generacodice.com/ru/articolo/3185202/how-to-store-a-record-which-holds-a-reference-to-any-other-column-attribute-in-another-table-relation
  postgresql  -  database-design  -  referential-integrity  -  relational-theory  -  foreign-key
dba.stackexchange dba.stackexchange

How to add an additional table over two one to many relations tables?

https://www.generacodice.com/ru/articolo/3175275/how-to-add-an-additional-table-over-two-one-to-many-relations-tables
  mysql  -  sqlite  -  database-design  -  application-design  -  relational-theory
dba.stackexchange dba.stackexchange

RDBMS: Proper way to store data - comma separated variables or in different fields or tables?

https://www.generacodice.com/ru/articolo/3163696/rdbms-proper-way-to-store-data-comma-separated-variables-or-in-different-fields-or-tables
  mysql  -  csv  -  database-design  -  relational-theory  -  codds-rules
dba.stackexchange dba.stackexchange

Incorrect result when using 'case when count()=0' & 'where'

https://www.generacodice.com/ru/articolo/3151345/incorrect-result-when-using-case-when-count-0-where
  sql-server  -  relational-theory
dba.stackexchange dba.stackexchange

How do you determine the direction of a relationship?

https://www.generacodice.com/ru/articolo/3137441/how-do-you-determine-the-direction-of-a-relationship
  sql-server  -  database-design  -  primary-key  -  relational-theory
dba.stackexchange dba.stackexchange

Is it possible to enforce corresponding hierarchies?

https://www.generacodice.com/ru/articolo/3130661/is-it-possible-to-enforce-corresponding-hierarchies
  database-design  -  relational-theory  -  foreign-key  -  constraint
dba.stackexchange dba.stackexchange

Delete duplicate keys with relation algebra

https://www.generacodice.com/ru/articolo/3109809/delete-duplicate-keys-with-relation-algebra
  relational-algebra  -  relational-theory  -  relational-calculus
dba.stackexchange dba.stackexchange
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