Tag relational-theory - Это страница 4 - GeneraCodice

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
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Why is it considered that a set unnormalizes a database absolutely?

https://www.generacodice.com/ru/articolo/3078382/why-is-it-considered-that-a-set-unnormalizes-a-database-absolutely
  normalization  -  relational-theory
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See direct (instead of indirect) info about rented book in my “actors_directors” talbe dropdown list - Access365

https://www.generacodice.com/ru/articolo/3074967/see-direct-instead-of-indirect-info-about-rented-book-in-my-actors-directors-talbe-dropdown-list-access365
  ms-access  -  relational-theory  -  ms-access-365  -  relations
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Why is this relation not in Boyce-Codd Normal Form (BCNF)?

https://www.generacodice.com/ru/articolo/3060357/why-is-this-relation-not-in-boyce-codd-normal-form-bcnf
  database-design  -  dependencies  -  normalization  -  relational-theory
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How do I bring a relation/table to first normal form (1NF) when one of the attributes/columns can hold any number of values?

https://www.generacodice.com/ru/articolo/3056529/how-do-i-bring-a-relation-table-to-first-normal-form-1nf-when-one-of-the-attributes-columns-can-hold-any-number-of-values
  database-design  -  normalization  -  relational-theory
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Normalization with two potential primary keys

https://www.generacodice.com/ru/articolo/3052407/normalization-with-two-potential-primary-keys
  database-design  -  dependencies  -  normalization  -  relational-theory
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Does a computed column break 3NF (third normal form)?

https://www.generacodice.com/ru/articolo/2993003/does-a-computed-column-break-3nf-third-normal-form
  sql-server  -  database-design  -  normalization  -  sql-server-2012  -  relational-theory
dba.stackexchange dba.stackexchange

Determining minimal cover of a relation

https://www.generacodice.com/ru/articolo/2991000/determining-minimal-cover-of-a-relation
  database-design  -  normalization  -  relational-theory
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Is a table without a primary key normalized?

https://www.generacodice.com/ru/articolo/2896890/is-a-table-without-a-primary-key-normalized
  database-design  -  normalization  -  relational-theory
dba.stackexchange dba.stackexchange

What is the meaning of “minimal key”?

https://www.generacodice.com/ru/articolo/2862128/what-is-the-meaning-of-minimal-key
  terminology  -  primary-key  -  relational-theory  -  candidate-key
dba.stackexchange dba.stackexchange
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