BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  UPDATE SQL for Excel - very slow - any suggestions?          BorlandTalk.com Forum Index -> Delphi Databases (ADO) View previous topic :: View next topic   Author Message Guillem Guest Posted: Mon Jan 23, 2006 12:28 pm    Post subject: Re: UPDATE SQL for Excel - very slow - any suggestions? Martin B wrote: Quote: Hello world, I am using ADO components to connect to a datasource; the user can connect to Excel sheets, Access or any other database. After using the program, the user will want to update certain fields in the datasource. I have implemented this with standard "UPDATE" SQL queries. This works fine with Access. But with Excel sheets it is very slow (factor 60). This is probably due to the fact that there is no index in the key fields in Excel. Any suggestions? Regards, Martin this is probably not what you want to hear but my first suggestion would be to forget SQL sentences for Excel. Try doing it directly per code. Additionally, you could try using DisableControls before beginning the operation and EnableControls after it. That usually helps to make it faster although I seriously doubt it will solve your problem completely -- Best regards :) Guillem Vicens Meier Dep. Informatica Green Service S.A. www.clubgreenoasis.com -- Contribute to the Indy Docs project: http://docs.indyproject.org -- In order to contact me remove the -nospam Back to top Martin B Guest Posted: Mon Jan 23, 2006 12:57 pm    Post subject: UPDATE SQL for Excel - very slow - any suggestions? Hello world, I am using ADO components to connect to a datasource; the user can connect to Excel sheets, Access or any other database. After using the program, the user will want to update certain fields in the datasource. I have implemented this with standard "UPDATE" SQL queries. This works fine with Access. But with Excel sheets it is very slow (factor 60). This is probably due to the fact that there is no index in the key fields in Excel. Any suggestions? Regards, Martin Back to top Vitali Kalinin Guest Posted: Mon Jan 23, 2006 1:44 pm    Post subject: Re: UPDATE SQL for Excel - very slow - any suggestions? "Martin B" <mb (AT) mb (DOT) com> ÓÏÏÂÝÉÌ/ÓÏÏÂÝÉÌÁ × ÎÏ×ÏÓÔÑÈ ÓÌÅÄÕÀÝÅÅ: news:43d4d212$1 (AT) newsgroups (DOT) borland.com... Quote: Hello world, I am using ADO components to connect to a datasource; the user can connect to Excel sheets, Access or any other database. After using the program, the user will want to update certain fields in the datasource. I have implemented this with standard "UPDATE" SQL queries. This works fine with Access. But with Excel sheets it is very slow (factor 60). This is probably due to the fact that there is no index in the key fields in Excel. Any suggestions? Regards, Martin AFAIK TADODataSet with CommandType = cmdTableDirect and CursorLocation = clUseServer is fastest for append data in Excel with ADO, so you can try this combination for Update. Also I think that yours guess about inefficiency of using where clause for un-indexed data could be quite valid, so you can switch to referencing of target cells by there Excel coordinate instead. Please let us know on yours results if any. Regards, Vitali Back to top Martin B Guest Posted: Tue Jan 24, 2006 1:03 pm    Post subject: Re: UPDATE SQL for Excel - very slow - any suggestions? I just tried that. It is too slow, and I also need to create columns that may be missing in the input table. I am using a memory table instead. By the way, doesn't the ADODataSet use UPDATE SQL in the background? "Brian Bushay TeamB" <BBushay (AT) Nmpls (DOT) com> wrote Quote: Hello world, I am using ADO components to connect to a datasource; the user can connect to Excel sheets, Access or any other database. After using the program, the user will want to update certain fields in the datasource. I have implemented this with standard "UPDATE" SQL queries. This works fine with Access. But with Excel sheets it is very slow (factor 60). This is probably due to the fact that there is no index in the key fields in Excel. Any suggestions? Don't use SQL Use a TadoDataset set the commandType to cmdTableDirect commandText to the datasheet you want to edit Then make all your changes directly to the tadoDataset -- Brian Bushay (TeamB) [email]Bbushay (AT) NMPLS (DOT) com[/email] Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Databases (ADO) All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.