Chapter 15 - Database Testing
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What does DBMS mean? | Database Management System
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| What is DBMS used for? | Used for storage of data and efficient retrieval of data
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| What is a database? | An organized collection of data
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| What does a database do? | It is a container storing data that people or devices can interact with. data is stored in a structured way, by creating tables.
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| What does not impose any constraints or security? | DBMS
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| What does RDBMS mean? | Relational Database Management System
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| What is RDBMS used for? | Data are stored in a relation or table. Each table contains rows or records, (also called tuples), and Columns which represent attributes or fields. Each record or row is represented by a unique field known as the Primary key. Small database 2GB.
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| What does SQL mean? | Structured Query Language
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| Rows - a.k.a. | Records , tupple
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| Columns - a.k.a. | fields , attribute
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| 1NF - First Normal Form | No repeating groups, all tables are two-dimensional
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| 2NF - Second Normal Form | No repeating groups, all tables are two-dimensional. Plus each data element is identified by one corresponding unique identifier-a primary key- that is not a composite and therefore cannot be subdivided into smaller bits of data.
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| 3NF - Third Normal Form | Plus all tables contain no data other than that which describes the intent of the primary key - extraneous data is placed in separate tables.
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| Records - a.k.a. | Rows , tupple
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| Tupple - a.k.a. | Rows , records
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| fields - a.k.a. | columns , attribute
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| attribute - a.k.a. | fields , columns
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| Database application | computer program whose primary purpose is entering and
retrieving information from a computer-managed database
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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