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A data model is a plan for a database design.
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Q10: SQL stands for Standard Query Language.
Q15: The SQL DELETE TABLE statement can be
Q29: UML-style E-R diagrams allow for the existence
Q44: In an SQL query,which SQL keyword actually
Q49: To add a NOT NULL column to
Q72: There is a common trap in writing
Q74: If the removal of facts about one
Q87: All weak entities must have a minimum
Q89: For database development,a challenge to the relational
Q101: When decreasing cardinalities,there will always be data