Fail Blog.
Emily owns this blog which is supposedly Maxinne's.
This blog is also supposedly for schoolwork. Well you know what. That is a load of sheep poo because, yeah, no.
Sorry Sir. (:
Monday, February 1, 2010
Data Dictionary.
Meta data: Data about data. Provides information about the different things in the database.
Example of what it can tell someone:
Example of what it can tell someone:
- Different types of data types [numeric data etc.]
- Field names
Data dictionaries refer to one table, therefore if there is four tables there are four data dictionaries.
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Schema: The schema (pronounced skee-ma) of a database system is its structure described in a formal language supported by the database management system (DBMS). In a relational database, the schema defines the tables, the fields in each table, and the relationships between fields and tables.
Example of a schema:
Example of a schema:
Legend:
Key: Primary field, only occurs once per table
Infinity: Can occur multiple times in a table
Read the textbook to understand more -.-;
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HYPERMEDIA - internet based database
- Site map:
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HYPERMEDIA - internet based database
- Site map:
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Slash meanings 0.o; [who would've thought they had differnt meanings...]
'\' - file system
'\\' - file server
'/' - web base instructions
Labels: class work, notes
9:25 AM
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after tomorrow but before today
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