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14 Cards in this Set
- Front
- Back
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the languages that comprise SQL
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DML, DDL, DCL
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DML is comprised of...
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INSERT, DELETE, SELECT, UPDATE
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DDL is comprised of...
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CREATE, ALTER, RENAME, DROP AND TRUNCATE
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DCL is comprised of...
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GRANT and REVOKE
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data model
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a collection of conceptual tools for describing data, data relationship, data semantics, and consistency constraints.
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Examples of DDL --->CREATION
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CREATE... TABLE, TRIGGER, PROCEDURE, and SEQUENCE
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What are the two types of DML?
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Procedural and nonprocedural
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What is procedural DML?
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When the user specifies what data is needed and how to get it.
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What is nonprocedural DML?
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The user specifies only what data is needed.
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What are the steps of the database planning life cycle?
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Gather information
Object identification Object modeling Identification of information for each object Relationships identification between objects |
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In DPLC what is...
data gathering |
tasks performed new requirements, old system and limitations, interview users
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In DPLC what is...
objects identification |
Primary entities and related entities
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In DPLC what is...
oject modeling |
Database model is created
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In DPLC what is...
identification of information |
Where information for each object is stored...4 types of info for objects are... Catagorical, relational/referential, identifier, raw data columns
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