13

13 (Indexes)

SQL Server SQL Server Constraints Primary Key Constraints Unique Constraints UPDATE, INSERT DELETE SQL Server SQL Server SQL Server Clustered Index ProductName Clustered Index NonClusteered Index Clustered Index Unique Index Clustered Index NonClustered Index Clustered Index NonClustered Index Clustered Index

B-Tree (Leaf) Cluster Index CustomerName TblCustomers CustomerName

Clustered Index SQL Server B-Tree Clustered Index

Clustered Index - Non-leaf Levels Root Page- Non-leaf Levels Intermediate Levels - Non-leaf Levels CustomerName B-Tree 141 Anny Key 101 110 SQL Server intermediate Levels - Leaf Levels

Management Studio - SQL Server Unique Index Primary key UNIQUE constraint

- CREATE INDEX - SQL Server sysindexes - - 1 2 - CustomerID CustomerName Clustered Index Management Studio 1. Indexes New Index 2. New Index

3.

Clustered Index Transact-SQL Clustered Index Management Studio CREATE INDEX

Clusrtered Index CLUSTERED CREATE INDEX

Clustered Index Clustered Index IX_CustomerName CustomerName TbCustomers

DROP_EXISTING

Clustered indexes

SQL Server SELECT

SQL Server

1. SQL Server CustomerName CustomerName Pinny

2. (Root Page) : 140 Pinny Merin Merin 145

3. Non-leaf Level 145 Pinny Merin Smith Merin 130

4. Leaf Level 130 Pinny Clustered Index

Clustered Index BETWEEN, >, >=, Microsoft SQL Server 2005>Performance Tools>Database Engine Tuning Advisor Connect to Server

2. Database Engine Tuning Advisor Session name

- Workload ....... SQL Server Profiler trace files (*.trc) Workload SQL Server Profiler Database for workload analysis Workload

- Select database and tables to tune Orders

3. Tuning Options Limit tuning time Physical Design Structures Clustered Index NonClustered Index

4. Progress Recommendations

5. Action>Apply Recommendations Apply Recommendations Apply now Schedule for later

6. Action>Save Recommendations Transact-SQL

SQL Server Profiler

SQL Server Profiler Workload

Workload

1. SQL Server Profiler Start>All Programs>Microsoft SQL Server 2005>Performance tools>SQL Server Profiler SQL Server Profiler (New Trace) Connect to Server

2. Trace Trace Properties Trace name Save to file (Workload) *.trc

Workload workload master Workload ( Workload Database Engine Tuning Advisor General Workload Table )

Trace Enable trace stop time SQL Server Profiler Workload

RUN Workload

3. ( Management Studio ) SQL Server Profiler Workload

,

Management Studio

Transact-SQL

Management Studio sp_rename

IX_TblProducts IX_ProductName

Clustered Index NonClustered Index Clustered Index Clustered Index Clustered index Clustered Index Clustered Index DROP_EXISTING CREATE INDEX Clustered Index Management Studio

Delete

Tranact-SQL

IX_ProductName TblProducts

Primary Key Constraints Unique Constraints Management Studio

Properties

Transact-SQL

sp_helpindex

3.3.3. Note

SQL Server ( internal identifier) Clustered Index Clustered Index NonClustered Index Clustered Index NonClustered Index

Add

Remove

Move Up

Move Down

OK

CREATE [ UNOQUE ] [ CLUSTERED| NONCLISTERED ] INDEX index_name

ON{ table | view} (column [ASC | DESC] [,n])

[WITH< index_option >[,n]]

[ON filegroup]

::={PAD_INDEX | FILLFACTOR=fillfactor |IGNORE_DUP_KEY|

DROP_EXISTING | STATISTICS_NORECOMPUTE |

SORT_IN_TEMPDB}

SELECT CustomerName FROM tblCustomer Where CustomerName= Pinny

SELECT* FROM TblCustomers WHERE CustomerName >= AAND CustomerName[,n]]

[ON filegroup]

< index_option > ::={PAD_INDEX | FILLFACTOR= | IGNORE_DUP_KEY | DROP_EXISTING | STATISTICS_NORECOMPUTER | SORT_IN_TEMPDB }

CREATE INDEX CustomerNamelnd ON TblCustomers (CustomerName) WITH FILLFACTOR = 50

Note

Fill Factor Fill Factor 2

Note

Primary Key Constraints Unique Constraints Unique Index

CREATE UNIQUE INDEX IX_ProductID ON TblProducts (ProductID)

CREATE UNIQUE INDEX IX_ProductID ON TblProducts (ProductID) WITH IGNORE_DUP_KEY

Note

Unique Index NULL Unique Index NULL 1 Unique Index

Note

Workload Workload SQL Server Profiler

Connect

> Start Analysis

Connect

Note

SQL Server Profiler Run (Font) Tools>Options Font name UPC

Note

Primary Key Constraints Unique Constraints Primary Key Constraints Unique Constraints

sp_rename [@objname = ] object_name , [@newname = ] new_name [,[@objtype = ] object_type]

EXEC sp_name TblProducts.IX_ProductID,IX_ProductName,INDEX

Note

DROP INDEX table.index / view.index[,n]

DROP INDEX TblProducts.IX_ProductName