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1. Referential integrity constraints are used to ____a- Enforce one to many relationshipsb- Enforce the uniqueness of the values entered as primary keysc- Ensure the foreign keys can be entered only if the corresponding value exists in the originating tabled- Ensure that values entered for a certain property (I,e, table column) are appropriate 2- The___ is a feature that enables you to ask complex questions that entail retrieving diFerent types or data or data from diFerent sources.a-Subquerya- Either B or Cb- Middle queryc- superquery3- which should be the ±rst step in designing a databasea- Enter data into the tablesb- Get the money upfront before this phasec- Identify the entities and their de±ning attributesd- Specify relationships among the entities 4- The term referring to a uniquely identi±able thing in the real world that you want to model in an ER diagram is called___a- Classb- Entityc- Objectd- table

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1. Referential integrity constraints are used to ____a- Enforce one to many relationshipsb- Enforce the uniqueness of the values entered as primary keysc- Ensure the foreign keys can be entered only if the correspondingvalue exists in the originating tabled- Ensure that values entered for a certain property (I,e, tablecolumn) are appropriate2-The___ is a feature that enables you to ask complex questions that entailretrieving diFerent types or data or data from diFerent sources.a-Subquerya- Either B or Cb- Middle queryc- superquery3-which should be the ±rst step in designing a databasea- Enter data into the tablesb- Get the money upfront before this phasec- Identify the entities and their de±ning attributesd- Specify relationships among the entities4- The term referring to a uniquely identi±able thing in the real world thatyou want to model in an ER diagram is called___a- Classb- Entityc- Objectd- table

 
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