SQL Server 2008

Advanced TSQL

AgendaEnhancing DML Functionality

Output ClauseMerge Statement

Managing TransactionsImplicit TransactionExplicit Transaction

Exception HandlingTry…Catch

AgendaExtending SQL Server Functionality

CTEXMLCLRFileStreamSpatialFull Text SearchService Broker

AgendaApply Operator

Cross ApplyOuter Apply

Pivoting DataPIVOTUNPIVOT

Ranking FunctionsROW_NUMBERRANKDENSE_RANKNTILE

Output ClauseProvides ability to access INSERTED and

DELETED tables during DML statement execution as we can access in Triggers.

Output Example

Merge StatementProvides you the ability to compare rows

between source and target tables, and then performs DML action accordingly only on target Table.

Merge Example

Managing TransactionImplicit Transaction

Setting mode for implicit transactionManual Commit – Set Implicit_Transactions OFFAuto commit – Set Implicit_Transactions ON

Explicit TransactionBegin Transaction [Trans Name]Commit Transaction [Trans Name]Rollback Transaction [Trans Name]Savepoint – Save Transaction [Savepoint

name]

Exception Handling (Try..Catch)Captures Error severity higher that 10Try…Catch TSQLBegin Try

[SQL Statements]End TryBegin Catch

[SQL Statements]End Catch

Retrieving Error Information ERROR_NUMBER() returns the number of the error.

ERROR_SEVERITY() returns the severity.

ERROR_STATE() returns the error state number.

ERROR_PROCEDURE() returns the name of the stored procedure or trigger where the error occurred.

ERROR_LINE() returns the line number inside the routine that caused the error.

ERROR_MESSAGE() returns the complete text of the error message. The text includes the values supplied for any substitutable parameters, such as lengths, object names, or times.

Exception Handling

CTELike derived tablesIterates results setsRecursive

CTE PartsWith ClauseCTE NameColumn NamesAS keywordAnchor QueryUnion AllSecond QueryOuter Query

CTE;WITH cte(col1,col2..)AS(Anchor_QueryUnion AllSecond_Query)Outer_Query;

PIVOTING DATAMoving rows for a column as columns

for aggregate values, reversing that combination as well through unpivot

PartsSource TablePIVOT/UNPIVOT OperatorAggregationFilter Clause (FOR)Pivot Table

Pivot SyntaxFrom

(Subquery) AS Source_TablePIVOT (Aggregate_Function(Column_ST)FOR Column_ST IN (Values in Column_ST)) AS Pivot_Table

Apply OperatorOuter ApplyCross Apply