A7YjSqWAVVM/0.jpg' alt='Microsoft Access Print Selected Records' title='Microsoft Access Print Selected Records' />Faster Microsoft Access Databases with 1. Tips for Improving Performance and Speed. Make an MDE File. If possible, make an MDE file out of your database. An MDE file cannot become decompiled, so your Visual Basic code always runs at top speed. Additionally, since no source code is stored in the MDE file, the database loads faster and uses less memory. Achieve the Compiled State. Module code is saved in two states in your Access database the source state, and the compiled state. The source state consists of the contents. The compiled state is the executable version of your code. All comments and white space have been removed, and a stream of executable instructions has been produced the code is ready to be run. Access_Password__TSAP_.gif' alt='Microsoft Access Print Selected Records Of War' title='Microsoft Access Print Selected Records Of War' />The difference between these two states. January if you dont understand them. When you run a procedure, VBA checks to see if the module containing the procedure is compiled. If it is, VBA simply runs the code. If it is not compiled, VBA compiles it by loading the code into memory, performing a syntax check, and compiling it into an executable format. If all these operations succeed, it can then run the code. You probably surmised that this process of compiling is not a free lunch it does take some time. And herein lies the crux of the matter compiling code takes time, and compiling lots of code takes lots of time. So if you want your database to run as fast as possible, your task is obviously to reduce the amount of time Access spends compiling your code to a bare minimum. In fact, in an ideal application, all your code should be compiled and saved in the compiled state. So how do you go about this Your Access database. VBA parlance is said to be in a compiled state when all modules, including form and report modules, are saved in both states in the database. This means that. the original source code is stored, as is the compiled version. In such a state, Access runs much faster, because it can completely bypass the compilation process. Getting your database into the compiled state is actually rather easy Open any module. From the Debug Menu, select Compile and Save All Modules. Your database is now in the compiled state. This includes form and report modules called class modules using Access terminology and standard modules. All VBA code that is called by your application is immediately ready for execution. Discusses how to control the principal object access growth after you apply Update Rollup 6 for Microsoft Dynamics CRM 2011. This document only has to be. You can use the Selected property in Visual Basic to determine if an item in a list box is selected. Readwrite Long. The Selected property is a zerobased. Lesson 7 Creating Reports. Reports organize and summarize data for viewing online or for printing. A detail report displays all of the selected records. Microsoft Access Short Questions and Answers with Illustrations Part I Suresh Khanal Kalanki, Kathmandu adminmcqsets. Published By httpmcqSets. Microsoft HealthVault is a webbased personal health record created by Microsoft, in October 2007, to store and maintain health and fitness information. Lesson 7 Mail Merge and Related Operations 227 Before writing the form letter you must create the Address List database of student records that. Please select your default document viewer to view images on Titlesearcher. You can change this setting anytime by clicking the Change Document Viewer link under. How to Use Microsoft Access. Microsoft Access is a database creation program that allows for anyone to easily maintain and edit a database. It is suitable. When you print data from your Microsoft Office Access 2007 database, the options you set depend on what kind of object you are printing and how you want your data to. There is no need for compilation. This is all fine and well, but is just as easy. When you make certain changes to your database, it automatically becomes decompiled, which means that the compiled state that you. How to Avoid Decompilation. So how do you avoid decompilation, or loss of the compiled state Any of the following actions can decompile your database Modify any module code. Make changes to code bearing objects, such as form, reports and controls, or create such code bearing objects. So the bottom line is to avoid decompilation, dont do the above. Its not as bad as it seems. After all, your database does not need to be in a. Therefore, if you follow these guidelines, you can enjoy peak performance from your module code During development, dont use Compile All Modules. It is a waste of time, because the first time you make any changes to the module. Compile All Modules. Rather, use the Compile Loaded Modules option instead. This action only compiles the. This is a much quicker operation, and results in the same syntax checking that Compile All Modules does. When you are ready to deliver your database for testing or live use, put it into the compiled state using the steps outlined above. Decompile to Eliminate Old VBA Compiled States. The Compact feature only compacts the data, but not the code portion of an Access database. To flush the database of old code. Bad DLL Calling Convention error, use the decompile command occasionally. Read this reference for more information on the Microsoft Access decompile feature. Active. X Controls Should Have References. If you are using an Active. X control, your database should have a Reference to the Active. X OCX file. This allows you to use early. In most cases, this is. Active. X control into a form or report, Access automatically creates a Reference for that control. Use Option Explicit. Always explicitly declare variables. Ensure this happens in every module in your application by using the Option Explicit phrase at the top of each module. Choose the Most Efficient Variable Type. Use the most efficient variable type possible when declaring variables. For example, dont use a Long Integer when an Integer will do. Avoid Variant types because the can be inefficient and slow. Microsoft Office Professional 2007 Applications Of Trigonometry. Use Early Binding. Avoid using the Object data type. Instead use the specific data type for the object you are working with. This allows Visual Basic to employ early binding which can be substantially faster in many cases. Assign Things to Object Variables. If you are going to refer to a property, control, object or data access object DAO more than once, assign it to an object variable. Use the Me Keyword. Use the Me keyword instead of the FormForm. Name form to refer to the form of a forms module. Avoid the Immediate If Function if Parts Run Other Code. Use the IIf immediate if statement sparingly. IIf does not employ short circuit evaluation. This means that both sides of the expression are always evaluated. Use Dynamic Arrays. Instead of fixed arrays, use dynamic arrays with the Erase and Re. Dim statements to make better use of memory. Take Advantage of Demand Loading. Organize and structure you modules to take advantage of Visual Basics demand loading architecture. When a procedure is loaded from a module. By placing related procedures in the same module, you can reduce the number of loads the Visual Basic has to make. Eliminate Dead Code. Eliminate unused procedures and unused variables. These elements use memory unnecessarily, and slow program load and execution. Our Total Access Analyzer program finds unused classes, procedures, variables. Use Constants Instead of Variables. If you are using data that is not going to change, put it in a constant instead of a variable. This allows Visual Basic to compile the value. Avoid Infinite Recursion. Avoid Infinite Recursion. Dont have code that can call itself without having some type of short circuit mechanism. This can lead to Out of Stack Space errors. Declare String Data Intelligently. Visual Basic allocates stack and heap memory differently according to the type of strings you create. By understanding how this works. String variables in procedures that are non static use space on. Use the following information to write code that minimizes stack memory usage. Local fixed length strings less than or equal to 6. They dont use heap memory. Local fixed length strings longer than 6. Local variable length strings use 4 bytes of stack. If your code used a large number of fixed length strings of 6. Minimize OLE References. Every time you reference a Visual Basic object, method or property, you are initiating one or more calls the OLEs Idispatch interface. Each one of these calls takes time. Minimizing the number of such calls is one of the best ways to make you code run faster. You can minimize OLE references by doing the following Use object variables instead of directly referring to objects. Use the With statement and the For Each construct to minimize object references. Move references to properties and methods outside of loops. When you refer to a member of collection, do so with the objects index number. Insert, Update, and Delete Records From a Table Using Access SQLInserting Records into a Table. There are essentially two methods for adding records to a table. The first is to add one record at a time the second is to add many records at a time. In both cases, you use the SQL statement INSERT INTO to accomplish the task. INSERT INTO statements are commonly referred to as append queries. To add one record to a table, you must use the field list to define which fields to put the data in, and then you must supply the data itself in a value list. To define the value list, use the VALUES clause. For example, the following statement will insert the values 1, Kelly, and Jill into the Customer. ID, Last Name, and First Name fields, respectively. INSERT INTO tbl. Customers Customer. ID, Last Name, First Name. VALUES 1, Kelly, Jill. You can omit the field list, but only if you supply all the values that record can contain. INSERT INTO tbl. Customers. VALUES 1, Kelly, Jill, 5. To add many records to a table at one time, use the INSERT INTO statement along with a SELECT statement. When you are inserting records from another table, each value being inserted must be compatible with the type of field that will be receiving the data. The following INSERT INTO statement inserts all the values in the Customer. ID, Last Name, and First Name fields from the tbl. Old. Customers table into the corresponding fields in the tbl. Customers table. INSERT INTO tbl. Customers Customer. ID, Last Name, First Name. SELECT Customer. ID, Last Name, First Name. FROM tbl. Old. Customers. If the tables are defined exactly alike, you can leave out the field lists. INSERT INTO tbl. Customers. SELECT FROM tbl. Old. Customers. Updating Records in a Table. To modify the data that is currently in a table, you use the UPDATE statement, which is commonly referred to as an update query. The UPDATE statement can modify one or more records and generally takes this form. UPDATE table name. SET field name some value. To update all the records in a table, specify the table name, and then use the SET clause to specify the field or fields to be changed. UPDATE tbl. Customers. SET Phone None. In most cases, you will want to qualify the UPDATE statement with a WHERE clause to limit the number of records changed. UPDATE tbl. Customers. SET Email None. WHERE Last Name Smith. Deleting Records from a Table. To delete the data that is currently in a table, you use the DELETE statement, which is commonly referred to as a delete query. This is also known as truncating a table. The DELETE statement can remove one or more records from a table and generally takes this form DELETE FROM table list. The DELETE statement does not remove the table structureonly the data that is currently being held by the table structure. To remove all the records from a table, use the DELETE statement and specify which table or tables from which you want to delete all the records. DELETE FROM tbl. Invoices. In most cases, you will want to qualify the DELETE statement with a WHERE clause to limit the number of records to be removed. DELETE FROM tbl. Invoices. WHERE Invoice. ID 3. If you want to remove data only from certain fields in a table, use the UPDATE statement and set those fields equal to NULL, but only if they are nullable fields. UPDATE tbl. Customers. SET Email Null. Inserting Records into a Table. There are essentially two methods for adding records to a table. The first is to add one record at a time the second is to add many records at a time. In both cases, you use the SQL statement INSERT INTO to accomplish the task. INSERT INTO statements are commonly referred to as append queries. To add one record to a table, you must use the field list to define which fields to put the data in, and then you must supply the data itself in a value list. To define the value list, use the VALUES clause. For example, the following statement will insert the values 1, Kelly, and Jill into the Customer. ID, Last Name, and First Name fields, respectively. INSERT INTO tbl. Customers Customer. ID, Last Name, First Name. VALUES 1, Kelly, Jill. You can omit the field list, but only if you supply all the values that record can contain. INSERT INTO tbl. Customers. VALUES 1, Kelly, Jill, 5. To add many records to a table at one time, use the INSERT INTO statement along with a SELECT statement. When you are inserting records from another table, each value being inserted must be compatible with the type of field that will be receiving the data. ID, Last Name, First Name. SELECT Customer. ID, Last Name, First Name. FROM tbl. Old. Customers. If the tables are defined exactly alike, you can leave out the field lists. INSERT INTO tbl. Customers. SELECT FROM tbl. Old. Customers. Updating Records in a Table. To modify the data that is currently in a table, you use the UPDATE statement, which is commonly referred to as an update query. The UPDATE statement can modify one or more records and generally takes this form UPDATE table name. SET field name some value. To update all the records in a table, specify the table name, and then use the SET clause to specify the field or fields to be changed. UPDATE tbl. Customers. SET Phone None. In most cases, you will want to qualify the UPDATE statement with a WHERE clause to limit the number of records changed. UPDATE tbl. Customers. SET Email None. WHERE Last Name Smith. Deleting Records from a Table. To delete the data that is currently in a table, you use the DELETE statement, which is commonly referred to as a delete query. This is also known as truncating a table. The DELETE statement can remove one or more records from a table and generally takes this form DELETE FROM table list. The DELETE statement does not remove the table structureonly the data that is currently being held by the table structure. To remove all the records from a table, use the DELETE statement and specify which table or tables from which you want to delete all the records. DELETE FROM tbl. Invoices. In most cases, you will want to qualify the DELETE statement with a WHERE clause to limit the number of records to be removed. DELETE FROM tbl. Invoices. WHERE Invoice. ID 3. If you want to remove data only from certain fields in a table, use the UPDATE statement and set those fields equal to NULL, but only if they are nullable fields. UPDATE tbl. Customers.