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24 Cards in this Set
- Front
- Back
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to write an effective spreadsheet, what are two basic principles?
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1) Focus on form
a) descriptive info should be on the top and left sides b) summary info should be on the bottom and right sides 2) Explain everything |
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What does conditional format do for a spreadsheet?
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allows you to apply an interpretation to the data and express that interpretation in an easy to perceive manner.
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how do you select a conditional format in excel?
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select columns you'd like to apply formatting to, go to "format" "conditional formatting" which will bring you to a window where you can specify changes.
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what is the general specification for an If function?
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If(condition, action_on_true_outcome, action_on_false_outcome)
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What is the general specification for the Left function and what does it do?
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distinguishes between segments in the left column, such as types of currencies.
Left(text_value, num_charts) |
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how do you combine a left and if function?
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If(Left(text_value, num_charts)="another text_value", True, False)
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what is a name?
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a word or phrase assigned to a cell or range of cells
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how do you apply scenarios to a spreadsheet?
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specify cells a scenario affects, go to tools, scenarios, and manage specifications
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how do you set a filter?
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go to data, filter, autofilter.
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how do you execute an advanced filter?
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give a column a name and a filtering criterion. add a new column with the same heaidng, the in cell below enter a criterion to indicate that values in the other columns by the same name should be filtereted to be greater than 175. Then you can run a filtering opertaion. Choose data, filtering, advanced search, then specify the range.
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what is an entity?
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anything that can be identified by a fixed number of its characterstics, called attributes.
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what are entity instances?
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values in rows
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what are table instances?
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tables containing specific rows
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What is a candidate key?
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set of attributes for which all entities are different
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what is a primary key?
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the one key the database system will use to decide uniqueness.
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what is atomic data?
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not decomposable into any smaller parts, like an address value
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What are five database operations?
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Select, project, union, difference, and product
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what does select do?
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specifies a row
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what does project do?
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specifies a column
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waht does union do?
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combines two tables with same attributes
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waht does Difference do?
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removes from one table the rows also listed in the second table.
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what does the product operation do?
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creates a supertable that has the columns from both tables.
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what does the join operation do?
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combines table like product, but doesn't necessarily produce all the pairings. it is hepful for matching alike attributes
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what is a relationship?
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correspondence between rows o one table and rows of another
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