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42 lines
849 B
Markdown
42 lines
849 B
Markdown
# CIS105: Computer Applications & Information Systems Lect. 18
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## Chapter 18: Databases
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> Housekeeping:
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>
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> - Zoom Office Hours: Tuesday April 23rd and 25th, **no class starting today.**
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### 18.1: Datase Overview
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- Column = Field
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- AKA attributes
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- Tables hold database data
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- DBMS
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- Oracle
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### 18.2: Database Structure
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- Entity Relationship Modeling (ERM): a database-modeling method used to construct a theoretical and conceptual representation of data to produce a schema.
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- Tables
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- Reports
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- Queries
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- Forms
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- DBAs still need to know the business.
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### 18.3: Business Database Advantages
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- Data Validation
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- No Errors + No Repeats = Data Integrity
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- GIGO: Garbage-in-Garbage-Out
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### 18.4: Structured Query language
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- Most widely used query language
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- SQL Clauses for updating fields:
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- `APPEND`
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- `DELETE`
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- `UPDTE`
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