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12 Cards in this Set
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- Back
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Information imported from another source
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External data
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A join-line between two tables
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Link
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A collection of data that uses separate tables to store different aspects of information.
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Relational database
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A field that uniquely indentifies each record in a table
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Primary key
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The primary key of a table placed in another table. it is used to create relationships
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Foreign key
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In access where records are listed only once in a primay table and appear multiple times in a related table
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One-to-many relationship
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A priamary table is one half of a relationship. it is like a master list of record. each record is uniquel indentified by a primary key and each record appears only once.
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primary table
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in access when relationships are created between three tables. the junction from the other two tables in this type of relationships
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many-to-many relationship
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A present in a many-to-many relationship and can contain one or more records from the other two tables in this type of relationships
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junction table
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A set of rules that ensure data validity between related tables
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Referential integrity
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The other half of a relationship. it contains the primary key from a primary table and the records from the primay table can appear in it multiple times.
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secondary table
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now relates the primary key of the account types table to the foreign key of the account table
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join line
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