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SQL Sever “Denali” Novità della clausola ORDER BY

User Group Italiano SQL Server. Speaker: Francesco Milano. Email: contact@francescomilano.it. SQL Sever “Denali” Novità della clausola ORDER BY. Speaker. Consulente freelance in ambito .NET e SQL Server Membro UGISS http://community.ugiss.org/blogs/fmilano/default.aspx.

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SQL Sever “Denali” Novità della clausola ORDER BY

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  1. User Group Italiano SQL Server Speaker: Francesco Milano Email: contact@francescomilano.it SQL Sever “Denali” Novitàdellaclausola ORDER BY

  2. Speaker Consulente freelance in ambito .NET e SQL Server Membro UGISS • http://community.ugiss.org/blogs/fmilano/default.aspx Francesco Milano UGISS - User Group Italiano SQL Server

  3. Agenda • Introduzione a OFFSET e FETCH • Versione SQL Server e database utilizzato • Sintassi • Come si usano • Esempio di paging • OFFSET/FETCH vs TOP UGISS - User Group Italiano SQL Server

  4. Introduzione a OFFSET e FETCH SQL Server “Denali” CTP3 • https://www.microsoft.com/betaexperience/pd/SQLDCTP3CTA/enus/ Database AdventureWorks2008R2 • http://msftdbprodsamples.codeplex.com/releases/view/55330 Versione SQL Server e database utilizzato UGISS - User Group Italiano SQL Server

  5. Introduzione a OFFSET e FETCH Sintassi http://msdn.microsoft.com/en-us/library/ms188385(v=sql.110).aspx ORDER BY order_by_expression [ COLLATE collation_name ]     [ ASC | DESC ]      [ ,...n ] [ <offset_fetch> ] <offset_fetch> ::= { OFFSET { integer_constant| offset_row_count_expression} { ROW | ROWS }      [ FETCH { FIRST | NEXT } {integer_constant| fetch_row_count_expression} { ROW | ROWS } ONLY ] } UGISS - User Group Italiano SQL Server

  6. Introduzione a OFFSET e FETCH Come siusano SELECT at.AddressTypeID AS ID, at.Name FROM Person.AddressType AS at ORDER BY at.Name; SELECT at.AddressTypeID AS ID, at.Name FROM Person.AddressType AS at ORDER BY at.Name OFFSET 2 ROWS FETCH FIRST 3 ROWS ONLY; OFFSET FETCH UGISS - User Group Italiano SQL Server

  7. Esempio di paging • SQL Server 2008 • Denali UGISS - User Group Italiano SQL Server

  8. OFFSET/FETCH vs TOP • TOP: controindicazioni • Sintassi può essere fuorviante • Non richiede necessariamente la clausola ORDER BY • Non permette di "saltare" dei record • Non è standard Si consiglia di utilizzare OFFSET/FETCH al posto di TOP! UGISS - User Group Italiano SQL Server

  9. Novità della clausola ORDER BY Presentazione e demo • http://www.ugiss.org Informazioni sul prodotto SQL Server • http://www.microsoft.com/italy/sql • http://www.microsoft.com/sql Supporto sviluppo ed professionisti IT • http://www.microsoft.com/technet/prodtechnol/sql • http://msdn.microsoft.com/sql Comunità SQL Server • http://www.ugiss.org Newsgroups pubblici via NTTP • microsoft.public.it.sql • microsoft.public.sqlserver.* Newsgroups pubblici via WEB • http://www.microsoft.com/italy/communities/newsgroups/default.mspx • http://www.microsoft.com/technet/community/newsgroups/server/sql.mspx Formazione • http://www.microsoft.com/italy/traincert Risorse Generiche UGISS - User Group Italiano SQL Server

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