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There are two mechanisms that Microsoft uses for locking: pessimistic locking, and optimistic locking. In Jet 4, the record locking model eliminates collateral locks, so that every record that is not in use is available. As a result, no other user can access the collaterally locked records, even though no user is accessing them and there is no need for them to be locked. The page locking model works by locking the pages, instead of individual records, which though less resource-intensive also means that when a user locks one record, all other records on the same page are collaterally locked. Data is stored in "records" of variable length that may take up less or more than one page. Microsoft databases are organized into data "pages", which are fixed-length (2 kB before Jet 4, 4 kB in Jet 4) data structures. In Jet versions before version 4, a page locking model is used, and in Jet 4, a record locking model is employed. Any single user can modify only those database records (that is, items in the database) to which the user has applied a lock, which gives exclusive access to the record until the lock is released. To prevent that data from being corrupted or invalidated when multiple users try to edit the same record or page of the database, Jet employs a locking policy. Jet allows multiple users to access the database concurrently. DAO provides an API that allows programmers to access JET databases using any programming language. The final module is the Data Access Objects (DAO) DLL. Another one of the modules contains the ISAM Drivers, DLLs that allow access to a variety of Indexed Sequential Access Method ISAM databases, among them xBase, Paradox, Btrieve and FoxPro, depending on the version of Jet. It can be shared and edited just by the single person which sometimes becomes the limitation of the application.There are three modules to Jet: One is the Native Jet ISAM Driver, a dynamic link library (DLL) that can directly manipulate Microsoft Access database files (MDB) using a (random access) file system API. It includes graphs, tables, and charts to explain the data virtually. It saves time and brings accuracy by analyzing data automatically. Excel makes the accounting process easier and hassles free.
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The data stored can be modified and shared with a large number of people at the same time which makes it much more applicable for its use by any organization or businessmen.Įxcel, on the other hand, is the spreadsheet which manages the numerical and statistical data by using varied and complex mathematical formulas. The data storing capacity of Access is higher than that of Excel. The data stored through access requires a complex procedure and skill set. Access is the program that manages data by storing, optimizing managing, and organizing data for any organization as a whole. Excel is useful for the short term data management by providing limited sharing of the given data whereas Access is useful for long term management of data to keep the record and store data.Īccess and Excel are two Microsoft applications that largely deal with the data management system but in varied ways.Access is the program that incorporates reports, queries, data, tables, etc whereas Excel manages the numerical and statistical data only by visualizing the content using tables, graphs, charts, histograms, etc.Excel does not require any predetermined learning of the process whereas Access is a fairly complex system that takes into account management of large files and queries therefore it is far more approachable to use Excel whenever required.Excel is the single user program where only one person can edit and share files whereas Access can be shared and edited by the number of people in the task force.Access is the application that manages and stores data for large scale documentation whereas Excel is the spreadsheet that calculates and analysis the numerical and statistical data.Main Differences Between Access and Excel