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Why do constraints? What harmful actions does a referential integrity constraint prevent? The benefits of the CONSTRAINT constraintname CHECK are usually obvious; why is
Why do constraints? What harmful actions does a referential integrity constraint prevent?
The benefits of the CONSTRAINT constraintname CHECK are usually obvious; why is the CHECK constraint no longer enforced in the CREATE TABLE? Where are the CHECK constraints that used to be in the CREATE TABLE placed in the current versions of the major DBMSs?
The benefits of the CONSTRAINT constraintname CHECK are usually obvious; why is the CHECK constraint no longer enforced in the CREATE TABLE? Where are the CHECK constraints that used to be in the CREATE TABLE placed in the current versions of the major DBMSs?
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Constraints in databases serve several purposes primarily to maintain data integrity and consistency ...
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Concepts of Database Management
Authors: Philip J. Pratt, Mary Z. Last
8th edition
1285427106, 978-1285427102
