click below
click below
Normal Size Small Size show me how
Access
CH 2: Tables and Queries in Relational Databases
| Term | Definition |
|---|---|
| AND logical operator | Returns only records that meet all criteria. |
| AutoNumber | A number data type that is generated by Access and is incremented each time a record is added. |
| Calculated field | Produces a value from an expression of function that references one or more existing fields. |
| CamelCase notation | Uses no spaces in multiword field names but uses uppercase letters to distinguish the first letter of each new word. |
| Caption property | Used to create a more readable label that appears in the top row in Datasheet view and in forms and reports. |
| Cascade Delete Related Records | An option that directs Access to automatically delete all records in related tables that match the primary key that is deleted from a primary table. |
| Cascade Update Related Fields | An option that directs Access to automatically update all foreign key values in a related table when the primary key value table is modified an a primary table. |
| Constant | A value that does not change. |
| Criteria row | A row in the Query Design view that determines which records will be selected. |
| Data redundancy | The unnecessary storing of duplicate data in two or more tables. |
| Data type | Determines the type of data that can be entered and the operations that can be performed on that data. |
| Date arithmetic | The process of adding or subtracting one data from another, or adding or subtracting a constant from a date. |
| Delimiter | A special character that surrounds the criterion's value. |
| Field property | A characteristic of a field that determines how a field looks and behaves. |
| Foreign key | A field in one table that is also primary key of another table. |
| Field row | A row in the Query Design view that displays the field name. |
| Indexed property | Setting that enables quick sorting in primary key order and quick retrieval based on the primary key. |
| Multitable qiery | Contains two or more tables. It enables you to take advantage of the relationships that have been set in your database. |
| NOT logical operator | Returns all records except the specified criteria. |
| Null | The term Access uses to describe a blank field. |
| Number data type | A data type that can store only numerical data. |
| One-to-many relationship | A relationship established when the primary key value in the primary table can match many of the foreign key values in the related table. |
| OR logical operator | Returns records meeting any of the specified criteria. |
| Query | Enables you to ask questions about the data stored in a database and then provides the answers to the questions by providing subsets or summaries of data. |
| Query Design view | Enables you to create queries; the Design view is divided into two parts - the top portion displays the tables and the bottom portion (known as the query design grid) displays the fields and the criteria. |
| Query sort order | Determines the order of records in the query's Datasheet view. |
| Referential integrity | Rules in a database that are used to preserve relationships between tables when records are changed. |
| Related tables | Tables that are joined in a relationship using a common field. |
| Run comand | Used to produce query results (the red exclamation point). |
| Select query | A type of query that displays only the records that match criteria entered in Query Design view. |
| Short text data type | A text field that can store up to 255 characters but has a default field size of 50 characters. |
| Show row | A row in the Query Design view that controls whether the field will be displayed in the query results. |
| Simply Query Wizard | Provides dialog boxes to guide you through the query design process. |
| Sort row | A row in the Query Design view that enables you to sort in ascending or descending order. |
| Table row | A row in Query Design view that displays the data source. |
| Validation rule | Prevents invalid data from being entered into a field. |
| Wildcard | A special character that can represent one or more characters in the criterion of a query. |
| All of the following are suggested guidelines for table design except: | Avoid data arithmetic. |
| Which of the following determines the type of data that can be entered and the operations that can be performed on that data? | Data type. |
| When entering, deleting, or editing table data: | The table must be in Dtasheet view. |
| When importing data into Access, which of the following statements in true? | You can assign a primary key while you are importing Excel data. |
| The main reason to enforce referential integrity in Access is to: | Keep invalid data from being entered into a table. |
| An illustration of a one-to-many relationship would be: | Customer may have multiple orders. |
| A query’s specifications providing instructions about which records to include must be entered: | Criteria row of the query design grid. |
| When adding criteria to the query design view: | Nothing () |
| It is more efficient to make a copy of an existing query, rather than create a new query when which of the following is true? | The existing query and the new query use the same tables and fields. |
| Which of the following is true for the Query Wizard? | No criteria can be added. |
| A special character that can represent one or more characters in the criterion of a query. | Wilchart |
| A characteristic of a field that determines how a field looks and behaves. | Field property |
| Returns only records that meet all criteria. | AND logical function |
| A row in the Query Design view that determines which records will be selected. | Criteria row |
| Determines the type of data that can be entered and the operations that can be performed on that data. | Data type |
| Used to create a more readable label that displays in the top row in Datasheet view and in forms and reports. | Caption property |
| Enables you to ask questions about the data stored in a database. | Query |
| The term Access uses to describe a blank field. | Null |
| A data type that is a number that automatically increments each time a record is added. | AutoNumber |
| The unnecessary storing of duplicate data in two or more tables. | Data redundancy |
| A data type that can store only numerical data. | Number data type |
| A relationship established when the primary key value in the primary table can match many of the foreign key values in the related table. | One-to-many relationship |
| A field in one table that is also the primary key of another table. | Foreign key |
| An option that directs Access to automatically update all foreign key values in a related table when a primary key value is modified in a primary table. | Cascade Update Related Fields |
| Rules in a database that are used to preserve relationships between tables when records are changed. | Referential Integrity |
| Uses no spaces in multiword field names, but uses uppercase letters to distinguish the first letter of each new word. | CamelCase notation |
| A row in the Query Design view that enables you to reorder data in ascending or descending order. | Sort row |
| Contains two or more tables, enabling you to take advantage of the relationships that have been set in your database. | Multitable query |
| Returns records meeting any of the specified criteria. | OR logical operator |
| Provides dialog boxes to guide you through the query design process | Simple Query Wizard |
| Table | A storage location in a database that holds related information. Made of records which are made up of a number of fields. |
| Text data type | can store either text or numerical characters. |
| Comparison operator | such as equal (=), not equal (<>), greater than (>), less than (<), greater than or equal to (>=), or less than or equal to (<=), can be used in the criteria of a query. |
| Query sort operator | determines the order of records in the query's Datasheet view. |
| Run command | the red exclamation point is used to produce the query results |
| Multi-table query | contains two or more tables. It enables you to take advantage of the relationships that have been set in your database. |
| Related tables | tables that are joined in a relationship using a common field. |