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A compiled version of an Access database (file extensions .MDE /ACCDE or .ADE; ACCDE only works with Access 2007 or later) can be created to prevent users from accessing the design surfaces to modify module code, forms, and reports. An MDE or ADE file is a Microsoft Access database file with all modules compiled and all editable source code ...
In computer science, a lookup table (LUT) is an array that replaces runtime computation of a mathematical function with a simpler array indexing operation, in a process termed as direct addressing. The savings in processing time can be significant, because retrieving a value from memory is often faster than carrying out an "expensive ...
␀␁␀␀MSISAM Database: 0 mny Microsoft Money file 00 01 00 00 53 74 61 6E 64 61 72 64 20 41 43 45 20 44 42 ␀␁␀␀Standard ACE DB: 0 accdb Microsoft Access 2007 Database 00 01 00 00 53 74 61 6E 64 61 72 64 20 4A 65 74 20 44 42 ␀␁␀␀Standard Jet DB: 0 mdb Microsoft Access Database 01 FF 02 04 03 02 ␁ÿ␂␄␃␂ 0 drw
In software, a data access object (DAO) is a pattern that provides an abstract interface to some type of database or other persistence mechanism. By mapping application calls to the persistence layer, the DAO provides data operations without exposing database details. This isolation supports the single responsibility principle.
Sorting or ordering the data based on a list of columns to improve search performance; Joining data from multiple sources (e.g., lookup, merge) and deduplicating the data; Aggregating (for example, rollup – summarizing multiple rows of data – total sales for each store, and for each region, etc.) Generating surrogate-key values
Only if the lookup fails, the registry is scanned. [16] A COM object can be created without type library information; with only a path to the DLL file and CLSID. A client can use the COM DLL function DllGetClassObject with the CLSID and IID_IClassFactory to create an instance of a factory object.
The terms data dictionary and data repository indicate a more general software utility than a catalogue. A catalogue is closely coupled with the DBMS software. It provides the information stored in it to the user and the DBA, but it is mainly accessed by the various software modules of the DBMS itself, such as DDL and DML compilers, the query optimiser, the transaction processor, report ...
Common aggregate functions include: Average (i.e., arithmetic mean) Count; Maximum; Median; Minimum; Mode; Range; Sum; Others include: Nanmean (mean ignoring NaN values, also known as "nil" or "null") Stddev; Formally, an aggregate function takes as input a set, a multiset (bag), or a list from some input domain I and outputs an element of an ...