Reports & Queries - Source : www.pcsoft-windev-webdev.com

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You can:• select one of the possible values among the values found in the data file.• view the entire data file.Caution: This option is available only if the Live Data is enabled. The Live Data is configured in the "LiveData" tab of the project description. See the online help (keyword: "Live Data") for more details.4. Validate. The result of the query is displayed according to the specified values.Note: If no parameter is selected (parameter not checked), the conditions that use the parameters will beignored.5.3.3 Using a query with parametersA query with parameters can be used:• in a window or in a page.• in a table, list box, combo box or looper.•in a report.• in any case, the entered parameters can be managed in an edit control.Using a query with parameters in a window or in a pagePrincipleWhen creating a window (or a page), this window (or this page) can be based on a query with parameters. Theparameters of the query can be entered in a previous window (or page) for example.To use a window (or a page) based on a query with parameters, the query must be run (HExecuteQuery):• before opening the window (or the page).• in the declaration code of the global variables of the window (or page).The necessary parameters must be passed when running the query. These parameters can be passed:•in HExecuteQuery directly.• by using the following notation ., then in HExecuteQuery.See the “Two methods for passing parameters to a query”, page 217 for more details.ExampleTo display the list of orders placed in year XXXX, the user performs the following operations:• type the requested year in the WIN_EditParam window.• click the "Show the result" button. The WIN_OrderList window is displayed. This window is based on theQRY_QryParamOrder query. This query is used to select the orders placed on the date specified by theuser.The following code is used to:• open the WIN_EditParam window,• retrieve the value entered by the user,• run the QRY_QryParamCustomer query.1. Opening the window for entering parameters in the initialization process of the WIN_OrderList window:-- Initialization process of WIN_CustomerForm windowQRY_ParamQuery is string// Open the WIN_EditParam window// retrieve the input performed by the userQRY_ParamQuery = Open(WIN_EditParam)214Part 2: Query editor
2. Running the query in the initialization process of the OrderList window:// Run the queryHExecuteQuery(QryParamCustomer, hQueryDefault, ParamQuery)// Similar code ://QryParamOrder.Year = ParamQuery//HExecuteQuery(QryParamOrder)Using a query with parameters in a table, a looper, a list box, a combo boxOverviewA table, a list box, a looper or a combo box can be used to display the content of a data file or query.A table, a list box, a looper or a combo box can be linked to a query:• independent. This query already exists in the project: select this query among the queries of your project.• included in the table, list box or combo box: this query will be created in the wizard for creating the Tablecontrol. This query will be available for this control only and it will be saved with the window that is using it.In this case, the window contains all the necessary elements.• with parameters: this query (independent or embedded) requires parameters to run and to display theresult in the table.Note: this paragraph only presents the tables but the operating mode is similar for the list boxes, the combosboxes and the loopers.Browsing tables based on independent queriesA browsing table based on an independent query (without parameter) displays the records of this query.By default, the query is run and loaded in memory when it is first used. The result of a query used in a browsingtable remains in memory when the associated window or page is closed. This query will not be re-runwhen it is re-used.To re-run this query, you must use:• HCancelDeclaration:•If HCancelDeclaration is not called, the next initialization of the table control (when the window is reopenedfor instance) will not re-run the query. The data retrieved during the last query execution will beused. If the table is based on a query with parameters, see "Browsing table based on a query withparameters (embedded or not)".•If HCancelDeclaration is called, the next initialization of the table control (when the window is re-openedfor instance) will re-run the query.• TableDisplay (or ListDisplay for a list box): to force the query to re-run, use TableDisplay associated with thetaReExecuteQuery constant.Browsing tables based on an embedded query (without parameter)A browsing table based on an embedded query (without parameter) displays the records of this query.By default, the query is run and loaded in memory when the table is displayed. The result of an embeddedquery used in a browsing table is automatically cleared from memory when the associated window is closed.This query will be re-run when it is re-used.To force the re-execution of the query, use TableDisplay (or ListDisplay for a list box) associated with thetaReExecuteQuery constant.Browsing table based on a query with parameters (embedded or not)When a browsing table is linked to a query with parameters (embedded or not), parameters must be passedto the query before it is run.If these parameters are not specified before the first execution of the query, the query will not be run and thetable will remain empty.Part 2: Query editor 215
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PART 2 - QUERY EDITOR121. INTRODUCT
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REPORT EDITOR - TABLE OF CONTENTS1.
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5.4 Parameters and print options of
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1. INTRODUCTION1.1 What is a report
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1.3 Main interface of the report ed
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1.4 A menu shaped like a ribbonWinD
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3. DATA SOURCES OF A REPORT3.1 Over
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Report based on an embedded queryTh
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3.8 Report based on an Organizer co
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Sales per year and pertype of produ
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iPicaToMMiPreview / iDestinationiPr
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QQuery 45Embedded query 45Independe
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152Part 1: Report Editor
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QUERY EDITOR - TABLE OF CONTENTS1.
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1. INTRODUCTION1.1 What is a query?
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1.2 Query editor1.2.1 OverviewThe q
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1.3 Main interface of the query edi
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Page 167 and 168: ImportantReminder: Reports & Querie
Page 169 and 170: 2.2.2 Creating a Select queryTo cre
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Page 185 and 186: 3. DESCRIBING A QUERY3.1 OverviewTh
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Page 213: Example: The following SQL code is
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