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glossary:d [2009/12/04 17:05]
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glossary:d [2012/10/26 14:46] (current)
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 ====== Glossary ====== ====== Glossary ======
  
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 ==== Data dictionary ==== ==== Data dictionary ====
-An information structure that defines the organization of a database including the list and description of each element of the database such as columns, data types, memory allocations for data storage, etc...+  * An information structure that defines the organization of a database including the list and description of each element of the database such as columns, data types, memory allocations for data storage, etc...
  
 ==== Data files ==== ==== Data files ====
- +  * Files that contain actual data, rather than meta-data or other data descriptions. See meta-data and data. 
-Files that contain actual data, rather than meta-data or other data descriptions. See meta-data and data. +
  
 ==== Data mart ==== ==== Data mart ====
- +  * A departmental or subject-specific subset of data of a data warehouse. See data warehouse. ​
-A departmental or subject-specific subset of data of a data warehouse. See data warehouse. ​+
  
 ==== Data mining ==== ==== Data mining ====
- +  * The process of finding patterns or trends in a collection of data.
-The process of finding patterns or trends in a collection of data. +
    
 ==== Data modeling ==== ==== Data modeling ====
- +  * The development of rules that cover data entities (objects such as relationships,​ tables, columns, data integrity, etc.) of a database management system. ​
-The development of rules that cover data entities (objects such as relationships,​ tables, columns, data integrity, etc.) of a database management system. ​+
  
 ==== Data set ==== ==== Data set ====
- +  * A collection of data entries where each entry contains a group of data items. Also called a table. ​
-A collection of data entries where each entry contains a group of data items. Also called a table. ​+
  
 ==== Data source file ==== ==== Data source file ====
- +  * An initialization file that stores the location of data on a server and the transport method used to access the data. 
-An initialization file that stores the location of data on a server and the transport method used to access the data. +
  
 ==== Data source name (DSN) ==== ==== Data source name (DSN) ====
- +  * DSN; in ODBC, the name of the origin (e.g., of a file, database, document, etc.) of transmitted data.
-DSN; in ODBC, the name of the origin (e.g., of a file, database, document, etc.) of transmitted data.+
    
-==== data type ==== +==== Data type ==== 
- +  ​* ​The characteristic description of data, be it alphabetic, numeric, integer, decimal, character, string, etc. 
-The characteristic description of data, be it alphabetic, numeric, integer, decimal, character, string, etc.  +
- +
-==== data type discrepancy ==== +
- +
-Condition in which data stored in a particular field does not match the DBMS data type defined for that field.  +
- +
-==== data warehouse ====+
  
-A voluminous collection of summarized consistent ​data, usually historical ​in nature, used for only data analysis rather than data processing  +==== Data type discrepancy ==== 
-A database designed and optimized ​for OLAP+  * Condition in which data stored ​in a particular field does not match the DBMS data type defined ​for that field
  
 +==== Data warehouse ====
 +  * A voluminous collection of summarized consistent data, usually historical in nature, used for only data analysis rather than data processing ​
 +  * A database designed and optimized for OLAP. 
  
 ==== Data-only option ==== ==== Data-only option ====
- +  * An option supported by the OmniAccess update routines (oainsert, oadelete, and oaupdate) that disables the real-time updating of OMNIDEX indexes. This option is useful when updating a high volume of records. Data-only updates must be followed by a DBINSTAL B or INDEX operation to update the OMNIDEX indexes. ​
-An option supported by the OmniAccess update routines (oainsert, oadelete, and oaupdate) that disables the real-time updating of OMNIDEX indexes. This option is useful when updating a high volume of records. Data-only updates must be followed by a DBINSTAL B or INDEX operation to update the OMNIDEX indexes. ​+
  
 ==== DataSource ==== ==== DataSource ====
- +  * A collection of information used by the ODBC software to connect to a database, required before accessing databases from a container application such as Microsoft Word. 
-collection of information used by the ODBC software to connect to a database, required before accessing databases from a container application such as Microsoft Word.  +
 ==== Decompile ==== ==== Decompile ====
- +  * in OMNIDEX, the process of reverting a compiled Environment Catalog file to an Environment source file using the utility OADECOMP.  
-in OMNIDEX, the process of reverting a compiled Environment Catalog file to an Environment source file using the utility OADECOMP.  +==== Denormalization ==== 
-denormalization +  * The process of introducing duplication of data within a relational database (which is typically normalized),​ used in data warehouse applications to avoid the inefficiencies of cross-table join operations. See normalization.
-the process of introducing duplication of data within a relational database (which is typically normalized),​ used in data warehouse applications to avoid the inefficiencies of cross-table join operations. See normalization.+
    
-==== detail ​data set ==== + 
-Child table. ​+==== Detail ​data set ==== 
 +  ​* ​Child table. ​
  
 ==== Detail Record ==== ==== Detail Record ====
- +  * A record in a child table. See DR Domain. ​
-A record in a child table. See DR Domain. ​+
  
 ==== DI keys ==== ==== DI keys ====
-Distributed Index key. See distributed index. ​ +  * Distributed Index key. See distributed index. ​
 ==== Dimension table** ==== ==== Dimension table** ====
-A parent table with a unique key that provides keyed access into a child (fact) table;  +  * A parent table with a unique key that provides keyed access into a child (fact) table;  
-tables ​that contain descriptions for codes in fact tables. ​+  * Tables ​that contain descriptions for codes in fact tables. ​
  
 ==== Direct access ==== ==== Direct access ====
- +  * The process of locating a record or row based on its location on a storage device, which is fast but requires an exact key match. See hashed access and hashed key. 
-The process of locating a record or row based on its location on a storage device, which is fast but requires an exact key match. See hashed access and hashed key. +
  
 ==== Disconnect ==== ==== Disconnect ====
-The process of disconnect from an Omnidex Environment or from a network connection. ​ +  * The process of disconnect from an Omnidex Environment or from a network connection. ​
 ==== Distributed index ==== ==== Distributed index ====
-An indexing option for Omnidex, or MDK indexes, in which the index is stored as a separate file, essentially creating an IMSAM, or ASK key;  +  * An indexing option for Omnidex, or MDK indexes, in which the index is stored as a separate file, essentially creating an IMSAM, or ASK key;  
-An ASK Index installed through an MDK Index process with ;DI option which can be used essentially as an MDK Index, including on-line index maintenance and optimization like an MDK Index, and also aggregation as on an ASK Index. ​+  ​* ​An ASK Index installed through an MDK Index process with ;DI option which can be used essentially as an MDK Index, including on-line index maintenance and optimization like an MDK Index, and also aggregation as on an ASK Index. ​
  
-==== domain ​==== +==== Domain ​==== 
-A parent table and any child tables that were linked (prejoined) to it during Omnidex installation;​  +  ​* ​A parent table and any child tables that were linked (prejoined) to it during Omnidex installation;​  
-A single, unjoined table with Omnidex indexes installed on it;  +  ​* ​A single, unjoined table with Omnidex indexes installed on it;  
-A a single data set installed with multiple keys;  +  ​* ​A a single data set installed with multiple keys;  
-An association of several data sets installed with multiple keys and linked during installation. Also called an Omnidex domain. See SI domain and DR domain. ​+   * An association of several data sets installed with multiple keys and linked during installation. Also called an Omnidex domain. See SI domain and DR domain. ​
  
 ==== DR ==== ==== DR ====
-See Detail Record. ​+  * See Detail Record. ​
  
 ==== DR domain ==== ==== DR domain ====
-an OMNIDEX domain that consists of one detail data set, or child table, that has not been linked to a master data set, or parent table. A DR domain child table can also be part of RS (Record Specific) domain. See Hybrid-DR domain and domain. ​ +  * An OMNIDEX domain that consists of one detail data set, or child table, that has not been linked to a master data set, or parent table. A DR domain child table can also be part of RS (Record Specific) domain. See Hybrid-DR domain and domain. ​
 ==== Drill down ==== ==== Drill down ====
-In data analysis, the process of narrowing data to retrieve specific underlying detail;  +  * In data analysis, the process of narrowing data to retrieve specific underlying detail;  
-In OMNIDEX, successive iterations of adding criteria to a query, refining a search to the exact subset of required data. +  ​* ​In OMNIDEX, successive iterations of adding criteria to a query, refining a search to the exact subset of required data. 
  
 ==== Driver Manager ==== ==== Driver Manager ====
- +  * Software written by Microsoft and installed when installing ODBC applications;​  
-Software written by Microsoft and installed when installing ODBC applications;​  +  ​* ​Software accessed by container applications such as Excel which initiates the appropriate ODBC driver such as the OMNIDEX ODBC Driver. ​
-Software accessed by container applications such as Excel which initiates the appropriate ODBC driver such as the OMNIDEX ODBC Driver. ​+
  
 ==== DSN ==== ==== DSN ====
 +  * DataSource Name; see data source name 
  
-DataSource Name; see data source name  +{{page>:​bottom_add&​nofooter&​noeditbtn}}
 
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glossary/d.1259946333.txt.gz · Last modified: 2012/10/26 14:40 (external edit)