COMPUTERS NOTES
Databases:
A structured collection of related information for organized data management. Goes beyond image collections, serving as a comprehensive data management system.
- Records and Tables:
• Records are single pieces of data within a database.
• Neatly organized within tables, consisting of different data categories known as fields.
• Fields enable efficient data storage and retrieval. - Queries:
• Allow users to retrieve specific data based on criteria.
• Differentiates Access from other applications focused on slides or worksheets. - Forms:
• Provide an interface for inputting, viewing, and editing data.
• Distinguished from tables, queries, and reports. - Primary Key:
• Uniquely identifies each record in a table.
• Safeguards data integrity by preventing duplication. - Design View:
• Used for understanding the structure of a table.
• Defines fields, data types, and relationships, streamlining data management. - Relationships:
• Crucial for linking tables to ensure data consistency and accuracy. - Reports:
• Present data in a structured and formatted manner.
• Aid in summarizing and analysing data. - SQL (Structured Query Language):
• Used to manage and manipulate relational databases effectively
- Records and Tables:
Controls and Data Validation:
• Controls enhance form functionality for interacting with data.
• Data validation rules ensure accurate and consistent data entry.Normalization:
• Organizes data to eliminate redundancy and improve efficiencyForeign Keys:
• Link tables in a relational database, maintaining relationships and data consistencyForm Wizard:
• Simplifies form creation through predefined templates.Indexing:
• Creates a data structure for quicker data retrieval.Blank Databases:
• Provide a foundation for users to design their own database components.Date/Time Data Type:
• Used to store dates accurately in Microsoft Access.
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