Constraint Violations
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Last updated 6:08 PM on 5/10/25
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5 Terms
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Referential Integrity Constraint Violation
Occurs when a foreign key value has no matching primary key value in the referenced table
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Key Constraint Violation
Occurs when duplicate values are inserted into a primary key or unique key column
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Domain Constraint Violation
Occurs when a value doesn't match the defined data type, format, or range for that column
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Entity Integrity Constraint Violation
Occurs when a primary key contains NULL values
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Semantic Integrity Constraints
Based on application semantics
Not expressible by model alone
Example: "max 56h/week for all employee projects"
SQL-99 uses triggers and assertions
Note 
Flashcards (52)