SQL Server - Bài 8

SQL Server - Bài

Lập trình SQL Server với .NetVu Tuyet Trinhtrinhvt-fit@mail.hut.edu.vnHanoi University of Technology1 MicrosoftMicrosoftWhat is .NET?An application development platform from MicrosoftRapidly develop secure and robust softwareWeb and WindowsFull support for object-oriented programming MicrosoftMicrosoftAdvantages of .Net FrameworkCLR – Common Language RuntimeGarbage collector, type safety, JIT, …Language integrationC#, VB.net, …Built-in support for open standardsSOAP, …Simple development, simple deploymentSupporting entity data model (ADO.net & entity framework) MicrosoftMicrosoftOutline√.Net Framework ADO.net CLR IntegrationEnabling CLR IntegrationCLT Integration: Pros & Cons MicrosoftMicrosoft.Net FrameworkWebFormsWebServicesADO.NET and XMLBase Framework ClassesCommon Language RuntimeWinForms… MicrosoftMicrosoftDataReaderDataSetDataAdapterADO.NET ArchitectureCommandTransactionConnectionCommandBuilderDisconnectedLayerConnectedLayerDataLayer MicrosoftMicrosoftADO.NET Managed ProviderSystem.data.dll+{System.data}….IDbConnectionIDbCommandIDataReaderIDbTransactionIDbDataAdapter….System.data.dll+{System.data.SqlClient}….SqlConnectionSqlCommandSqlDataReaderSqlTransactionSqlDataAdapterSqlCommandBuilderWarning: There is no IDbCommandBuilder MicrosoftMicrosoftDataReaderFast Forward-Only/Read-Only streams of dataReturned by IDbCommand.ExecuteReader( .)Data is not cached on the client-sideMust be closed explicitlyNot serializableCannot be inherited (sealed class) MicrosoftMicrosoftDataSetIn-memory cache of dataRelational view of dataData source agnosticKeeps track of changesContains an XSD schemaMarshalByValue objectDataSetSchemaRelationTableColumnConstraintRow MicrosoftMicrosoftTypedDataSetWithout TypedDataSetWithout TypedDataSetWith TypedDataSetWith TypedDataSetCode is more readableIntroduces compile-time checkingIntellisense under Visual Studiodataset.Tables[0].Rows[0][1] = 1023;dataset.Tables[“Orders”].Rows[0][“CustomerID"] = 1023;dataset.Orders[0].CustomerID = 1023; [...]... Server, a new Provider    Very similar to SqlClient Provider Follows Managed Provider Model Supports     Microsoft IDbConnection IDbCommand IDbDataReader Etc InProc Managed Provider (2)  Dude, where’s my Connection?  In Out-of-proc ADO.NET: using (SqlConnection conn = new SqlConnection(" ")) using (SqlCommand cmd = conn.CreateCommand()) { try { cmd.CommandText = " "; conn.Open(); using (SqlDataReader... to VS about how to deploy       Microsoft [SqlProcedure] [SqlFunction] [SqlUserDefinedType] [SqlUserDefinedAggregate] … Also used at runtime for behaviors of objects Managed Stored Procedures  To expose a Stored Procedure:    The containing class must be public The exposed method must be public The exposed method must be static public class SqlClr { public static void MyProc() { // Put your... Name>. CREATE FUNCTION Addition ( @x int, @y int ) RETURNS int AS EXTERNAL NAME ExampleYukon.SqlClr.Addition Microsoft Managed Functions (2)  Code is similar to Stored Procedures [SqlFunction] public static int Addition(int x, int y) { return x + y; }  [SqlFunction] Parameters  Helps SQL Server know what the function does     Microsoft IsDeterministic IsPrecise DataAccess SystemDataAccess... Custom Average Example [Serializable] [SqlUserDefinedAggregate(Format.UserDefined, MaxByteSize = 80 00)] public class CustomAverage : IBinarySerialize { SqlDouble _total = 0; ulong _totalCount = 0; public void Init() { } public void Accumulate(SqlDouble Value) { ++_totalCount; if (_total.IsNull) _total = 0; _total += Value; } public void Merge(StdDev grp) {/* */ } public SqlDouble Terminate() { return _total/_totalCount;... Microsoft SqlDataAdapter XML File DB Outline √ √    Net Framework ADO.net CLR Integration Enabling CLR Integration CLT Integration: Pros & Cons Microsoft CLR Integration  Brand new since SQL Server 2005 (Standard and Express)  Write database queries using NET  Supporting Any NET language (C#, VB, C++)  Creating and debugging using VS 2005 IDE Microsoft What can we do with CLR code?  Common T -SQL. .. EXTERNAL NAME AssemlyExample.SqlClr.InputProcedure CREATE PROCEDURE OutputProcedure @number int OUTPUT AS EXTERNAL NAME AssemlyExample.SqlClr.OutputProcedure CREATE PROCEDURE InOutProcedure @number int OUTPUT AS EXTERNAL NAME AssemlyExample.SqlClr.InOutProcedure NOTE: You don’t specify ReturnParameters CREATE PROCEDURE ReturnProcedure AS EXTERNAL NAME AssemlyExample.SqlClr.ReturnProcedure Microsoft... AssemlyExample.SqlClr.AddContact  DDL Triggers CREATE TRIGGER ON AS EXTERNAL NAME .. CREATE TRIGGER AddUser ON DATABASE FOR CreateUser AS EXTERNAL NAME AssemlyExample.SqlClr.AddUser Microsoft TriggerContext ColumnsUpdates to see what columns changed  public static void AddAuthor() { SqlTriggerContext... Type that does the aggregation Use DML command to register CREATE AGGREGATE ( @param ) RETURNS EXTERNAL NAME . CREATE AGGREGATE CustomAverage ( @value float ) RETURNS float EXTERNAL NAME AssemlyExample.CustomAverage Microsoft Custom Aggregates - CLR Class     called during the aggregation Not just passed a set of values, but one at a time... is disposed } finally { conn.Close() } } // using statements ensure Disposed is called Microsoft InProc Managed Provider (3) InProc you can assume the connection  using (SqlCommand cmd = new SqlCommand()) { cmd.CommandText = " "; SqlContext.Pipe.ExecuteAndSend(cmd); } Microsoft ... and the data Scale up/out possibilities of different tiers Abstraction of the database technology Security requirements Set-based versus procedural code Possibilities for using shared code libraries in multiple tiers Microsoft Enabling CLR Integration  Enabled on an instance  SQL Script    Execute sp_configure ‘clr enabled’, ‘1’ Sp_reconfigure Surface Area Configuration (features) Microsoft Assembly . ProviderSystem.data.dll+{System.data}….IDbConnectionIDbCommandIDataReaderIDbTransactionIDbDataAdapter….System.data.dll+{System.data.SqlClient}….SqlConnectionSqlCommandSqlDataReaderSqlTransactionSqlDataAdapterSqlCommandBuilderWarning: There is no. Lập trình SQL Server với .NetVu Tuyet Trinhtrinhvt-fit@mail.hut.edu.vnHanoi University of Technology1 MicrosoftMicrosoftWhat