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94 Cards in this Set

  • Front
  • Back
Ad Hoc querying
direct retrieval of information by end-users from a database whereby the retrieval was not planned (i.e. no pre-formulated queries or interfaces were developed in anticipation of needing the information)
Aggregation function
a mathematical operation used in querying to summarize information within a single column; also called a vertical calculations
Comparison operator
in querying, operators used to compare a variable to a value; common comparison are less than, equal to, greater than or equal to and less than or equal to
Data manipulation
the specification of operations to be preformed on one or more data fields to obtain additional information; may create aggregations, horizontal calculations, subset selections, etc.
Data type (field property)
specification as to what kind of data values may be entered into a database table's column
Database window
a screen that depicts the components of the selected database.
datasheet view
a mode that presents a relational table or a query result in row/column format
design view
for relational tables, a mode that displays details about the fields of a table and allows the user to specify various design parameters such as which fields comprise the primary key, whether a field is set to required to data entry, and the data type for a field; for queries, a mode the depicts the logic of a query in QBE format
dynaset
a query's result; looks and behaves like a table but is not actually stored as a table, it is generated as a view each time the query is run
enforce referential integrity
a choice is selected in the relationship layout to determine whether the referential integrity principle will be forced in a relationship between two tables as the users enter data into the database
equi-join
a join that combines the tables together based on a common attribute, keeping only those rows for which data values of the common attribute match exactly; also called an inner join
expression builder
an application within Microsoft access that assists the user in creating horizontal calculations within queries.
field property
defines the type of data allowed to be entered into a column of a database table
group by
a querying function used to create subgroups to which aggregations may be applied; a means for creating subtotals.
horizontal calculation
a row computation in a query that combines data from two or more separate columns of one or more tables
horizontal subset of a table
a part of a table that includes only some of the tables rows, but includes all the columns
information retrieval
repossession or capture of data that was previously entered into a database or other data storage structure
inner join
a join that combines the tables together based on a common attribute, keeping only those rows for which the data values of common attribute match exactly; also called an equi-join
join
to combine separate but related tables by linking them on their common attributes; one of the three primary relational algebra operators discussed
join properties window
a screen that appears when a user double clicks on a join line to reveal whether the join is an inner join, a left join, or a right join, a user an change the join type in this window
left join
a combination of tables based on a common attribute that includes unmatched records from the first table in the join and does not include unmatched records from the second table in the join; is a partial outer join
logical operator
Boolean search terms used in queries to define which records are included in the query result; Examples include AND, OR, and NOT
mathematical operations
a calculation that manipulates data values
outer join
a combination of tables based on a common attribute that includes unmatched records from both sides, accomplishes a set union of the tables
parameter query
a query in which variables are used in lieu of data values as a part of the query is run, thereby allowing re-use of the same query many times for different decisions
physical database implementation
a working database system; is dependent on the hardware software, and type of software chosen during the design stages
posted key
an attribute of a database table that is added to another database table to create a link between tables
project
a relational algebra operator that specifies a vertical subset to be included in the query result
query
a request for information submitted to a database engine
Query by Example
a type of query interface intended to be more 'point and click' in nature than is SQL; in this interface the user creates visual example of what tables and fields should be included in a query and specifies any calculations to be included
query grid
the lower half of the QBE view into which fields are dragged and in which aggregations or horizontal calculations may be created to establish the desired logic for query
query window
the screen in which queries are created; users may toggle back and forth between QBE design, SQL design. and datasheet views within the query window
relational algebra
the original data manipulation languauge that was constructed based on set theory and predicate logic as part of the relational database model; primary operators include select, project, and join
relationship layout
a window in which relationships between tables are visually depicted
required data entry (field property)
a choice is specified in table design view; a user will not be allowed to enter a record into a table without including a value for any field for which this property is set to 'yes'; a user may leave any field except the primary key blank for which this property is not set to 'yes'
right join
a combination of tables based on a common attribute that includes unmatched records from the second table in the join and does not include unmatched records from the first table in the join; partial outer join
select
a relational algebra operator that specifies a horizontal subset to be included in the query result
select-from-where
the format of SQL queries; the select clause specifies a vertical subset to be included in the query result; the from clause specifies which table are to be queried and any sub-grouping to be done; the where clause specifies a horizontal subset to be included in the query result
show table window
a screen from which users may choose which table to include in the relationship layout or in a query
SQL view
a mode for viewing the underlying SQL statement for a query; even if a query was created in QBE mode, Microsoft generates a corresponding SQL statement that the user may view to evaluate\ the query's logic
Structured Query Language (SQL)
a query language developed to enable the performance of multiple operations in a single query and to use a standard format for every query statement to simplify the task of query development
syntax
the formatting rules of a query language
vertical calculation
a computation that is summarization of data values within is single column, also called aggregation function.
vertical subset of table
a part of a table that include only some of the tables columns (but not include all the rows)
agent queries
queries that involve single tables containing data that describes internal and external agents; typically such queries are used to list one or more internal and external agents who possess one or more specific characteristics
data constraint
a restriction placed on a date field in a query to limit the query rrsults to include only records for which the data values meet the restriction
duality association queries
queries that involve the tables that comprise a relationship between an economic decrement and an economic increment even such as that between a sale and cash reciept or between cash disbursement and purchase; typically such queries are used to identify incomplete exchanges or to calculate dollar vales of claims of accounts receivable
event queries
queries that involve single tables containing data that describes events; typically such queries are used to list one or more events that meet specific criteria
fulfillment association queries
queries that involve the tables that comprise a relationship either between an instigation event and a commitment event and an economic event; typically such queries are used to identify or to calculate total values of unfulfilled items such as open purchase requisitions, open purchase orders, etc
null to zero function
a Microsoft access procedure used in querying that treats null values as if they are zeros
outer join
a combination of tables based on a common attribute that includes unmatched records from both side; accomplishes a set union of the tables
parameter query
a query in which variables are used in lieu of data values as part of the query's selection criteria; allows the user to specify the data value to be used each time the query is run, thereby allowing re-use of the same query many times for different decisions
participation association query
queries that involve the tables that comprise a relationship between an event and an agent; typically such queries are used to identify information about the agents who participated in an event or to aggregate event data by agent
proposition association queries
queries that involve the tables that comprise a relationship between an instigation event and a resource or resource type; typically such queries are used to list the quantities or dollar values of the items included in the event or aggregate them for a time period
reservation association queries
queries that involve the tables that comprise a relationship between a commitment event and a resource or resource type; typically such queries are used to list the quantities or dollar values of the items included in an event or time period
resource queries
queries that involve single tables containing data that describes resources or resource types; typically such queries are used to identify one or more resources that possess specific characteristics
reversal association queries
queries that involve the tables that comprise a relationship between an economic event and a reversal event that negates part of all of the economic event; typically such queries are used to identify or aggregate the net event activity
stockflow association queries
queries that involve the tables that comprise a relationship between an economic event or a reversal event and a resource or a resource type; typically such queries are used to list the quantities or dollar values of the items included in the event or to aggregate them for a time period
weighted average unit cost
an inventory costing method that divides the total cost of each type of item available for sale by the total quantity available; that unit cost is multiplied by the quantity sold during a time to derive cost of goods sold and that unit cost is multiplied by the quantity on hand to get the cost balance of ending inventory
abstraction
the ignoring or hiding of details to capture some kind of commonality between different instances. Examples in conceptual modeling include generalization and typification
accountability infrastructure
in the REA ontology, the economic and commitment activities that actually have happened
generalization
the abstraction from a class of objects to a super class (less detailed, higher level) via the creation of an "is-a" relationship between the subclass and the superclass.
policy infrastructure
in the REA ontology, the economic and commitment activities that should, could, or must happen in a company. The policy infrastructure reflects the results of planning and control efforts by the enterprise management
typification
representation as a category or type rather than as a individual instance
bill of materials
a document that identifies the types and quantities of raw materials needed to create a finished good item; similar to the ingredient list of a recipe
consume stockflow association
a relationship between a resource and an economic decrement whereby the resource is partially used up by the decrement but still exists when the decrement is complete
conversion cycle
transaction cycle in which materials, labor, machinery, and other resources are transformed into finished goods or services; also called the manufacturing cycle or production cycle
duality association
the casual link between a give event and a take even (economic decrement and an economic increment event)
economic decrement event
an event that decreases one or more resources
economic increment event
an event that increases one or more resources
equipment
a resource that gets partially consumed in machine operations in the conversion cycle
finished goods
the resource produced in a production run event in the conversion cycle; the type of inventory into which raw materials, labor, and equipment are transformed
fulfillment association
relationship between instigation and commitment events whereby the commitment events fulfill the instigation events AND relationship between commitment and economic events whereby the economic events fulfill the commitment events
job time ticket
a document that indicates starting and stopping time and descriptions for labor operations performed on a specific date by a specific employee; the documents number often serves as the identifier of the labor operation event; also called a time track document
labor operation
an economic decrement event that uses up the employee labor resource
labor type
a resource type class that represents a list of kinds of labor activities that can be preformed in labor operations
linkage association
relationship between two resource types to represent the fact that one of the resource types is composed of the other; in the conversion cycle this provides a means for identifying the materials a finished good is composed of, the types of labor that are needed to produce a finished goods, and the types of equipment that are needed to produce a finished good. A bill of materials shows this linkage between materials and finished goods.
machine operation
economic decrement event that partially consumes a machine in the conversion cycle
move ticket
document typically used in the conversion cycle to indicate the actual use of raw materials
operations list
document that identifies the labor types needed to create a finished good; captures the same information as the linkage relationship between labor types and finished goods.
participation association
relationship between an event and an internal and external agent
production employee
internal agent involved in labor operations and production runs in the conversion process; a worker who participates in the manufacture of finished goods.
production order (document)
document that captures information about a production order event and also often is used to record information about the resulting production run
production order (event)
event that represents the enterprises commitment to engage in a future economic increment event (production run) that will increase the finished goods resource
production run
economic increment event that increases the quantity of a finished goods resource/ resource type
production supervisor
internal agent who authorizes events in the conversion cycle
raw materials issuance
econcomic decrement event involving the using up of raw materials in the production process; the raw materials are usually transformed into finished goods and lose their own identity and nature in the process; also called material issuance
raw material requisition
commitment event whereby the inventory clerk or warehouse supervisor commits to the production supervisor to transfer materials from the materials warehouse to the production floor; assumes raw materials are available within the enterprise and reserves them for use.
raw materials
input resource in the conversion process that is completely used up in the transformation to finished goods; also called materials
reciprocal association
relationship between a commitment to an economic increment event and a commitment event to an economic decrement event; the commitment level equivalent of duality in the conversion cycle represents a schedule of what is to be produced and what will need to be used and consumed in the production process
reservation association
relationship between a commitment event and a resource or resource type; often specifies quantity and budget cost or selling price for the resources involved in the agreement
transfer duality association
relationship between economic increment and economic decrement events in which the decremented resources are traded for the incremented resources
transformation duality association
relationship between economic increment and economic decrement event in which the decremented resources are converted into incremented resources
use stockflow association
relationship between a resource and an economic decrement event whereby the resources is completely subsumed by the decrement; i.e. the resource is completely used up