BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Select data from two different databases          BorlandTalk.com Forum Index -> Delphi Databases (dbExpress) View previous topic :: View next topic   Author Message Alex.K Guest Posted: Tue Apr 17, 2007 9:11 pm    Post subject: Select data from two different databases Hello, D2007 - dbExpress - MSSQL How can I perform Heterogeneous queries? In the BDE I use : SELECT D.*, R.S_NUM, A.DISPLAY_NAME FROM ":DB1:TRACKER" D, ":DB1:AINFO" A INNER JOIN ":DB2:S_REF" R ON (D.PRIMEKEY=R.PRIMEKEY) WHERE ( CAST(DATESENT AS DATE) BETWEEN :B1 AND :B2) AND (A.AKEY=D.AKEY) How to do this with dbExpress? TIA, - Craig Back to top Bill Todd Guest Posted: Wed Apr 18, 2007 5:33 am    Post subject: Re: Select data from two different databases dbExpress does not support heterogeneous queries the way BDE does. However, SQL Server allows you to join tables in two different databases. See BOL for details. The syntax IIRC is DbName.dbo.TableName. -- Bill Todd (TeamB) Back to top Alex.K Guest Posted: Wed Apr 18, 2007 7:16 pm    Post subject: Re: Select data from two different databases Hello Bill, The two databases reside in the same instance of MSSQL. I can perform the query in SQL Query Analyzer, however, using the dbExpress controls, how would I do it. TIA, -Craig "Bill Todd" <no (AT) no (DOT) com> wrote in message news:46255945$1 (AT) newsgroups (DOT) borland.com... Quote: dbExpress does not support heterogeneous queries the way BDE does. However, SQL Server allows you to join tables in two different databases. See BOL for details. The syntax IIRC is DbName.dbo.TableName. -- Bill Todd (TeamB) Back to top Martijn Tonies Guest Posted: Wed Apr 18, 2007 9:02 pm    Post subject: Re: Select data from two different databases Quote: The two databases reside in the same instance of MSSQL. I can perform the query in SQL Query Analyzer, however, using the dbExpress controls, how would I do it. Same way as you do it in the Query Analyzer. -- Martijn Tonies Database Workbench - development tool for Microsoft SQL Server, and more! Upscene Productions http://www.upscene.com My thoughts: http://blog.upscene.com/martijn/ Database development questions? Check the forum! http://www.databasedevelopmentforum.com Back to top Alex.K Guest Posted: Wed Apr 18, 2007 10:21 pm    Post subject: Re: Select data from two different databases Hello Martijn, I am new to dbExpress, what controls do I use? Do I need two SQLConnections? and one SQLQuery? If so, how do I tell the query how to connect to the DB's? Any sample code? TIA, -Craig "Martijn Tonies" <m.tonies (AT) upscene (DOT) removethis.com> wrote in message news:46264111 (AT) newsgroups (DOT) borland.com... Quote: The two databases reside in the same instance of MSSQL. I can perform the query in SQL Query Analyzer, however, using the dbExpress controls, how would I do it. Same way as you do it in the Query Analyzer. -- Martijn Tonies Database Workbench - development tool for Microsoft SQL Server, and more! Upscene Productions http://www.upscene.com My thoughts: http://blog.upscene.com/martijn/ Database development questions? Check the forum! http://www.databasedevelopmentforum.com Back to top Bill Todd Guest Posted: Thu Apr 19, 2007 2:16 am    Post subject: Re: Select data from two different databases Alex.K wrote: Quote: I am new to dbExpress, what controls do I use? TSQLDataSet Quote: Do I need two SQLConnections? and one SQLQuery? If so, how do I tell the query how to connect to the DB's? No. Connect to either database. The SQL statement is executed by SQL Server, not your application. SQL Server takes care of the database connections. -- Bill Todd (TeamB) Back to top Alex.K Guest Posted: Thu Apr 19, 2007 2:59 am    Post subject: Re: Select data from two different databases Thanks Bill! Ok, now it makes sense.. I have been trying to get this to work with FastReports v4, however, running the same query select statement that I run in the SQL Query Analyzer which returns a result, it does not return anything using the dbx-controls in FastReports. Do you know if there is anything different that I need to do in FR? TIA, - Craig ----- Original Message ----- From: Bill Todd Newsgroups: borland.public.delphi.database.dbexpress Sent: Wednesday, April 18, 2007 3:16 PM Subject: Re: Select data from two different databases Alex.K wrote: Quote: I am new to dbExpress, what controls do I use? TSQLDataSet Quote: Do I need two SQLConnections? and one SQLQuery? If so, how do I tell the query how to connect to the DB's? No. Connect to either database. The SQL statement is executed by SQL Server, not your application. SQL Server takes care of the database connections. -- Bill Todd (TeamB) Back to top Bill Todd Guest Posted: Thu Apr 19, 2007 5:41 am    Post subject: Re: Select data from two different databases Alex.K wrote: Quote: Do you know if there is anything different that I need to do in FR? I know nothing about Fast Reports. -- Bill Todd (TeamB) Back to top Alex.K Guest Posted: Thu Apr 19, 2007 6:41 pm    Post subject: Re: Select data from two different databases Ok, thanks again Bill! - Craig "Bill Todd" <no (AT) no (DOT) com> wrote in message news:4626ac92 (AT) newsgroups (DOT) borland.com... Quote: Alex.K wrote: Do you know if there is anything different that I need to do in FR? 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