module_8 retrieving sql metadata and improving sql performanceod1.pptx

8/11/2019 Module_8 Retrieving SQL Metadata and Improving SQL Performanceod1.pptx

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08 | Retrieving SQL Server Metadata

and Improving Query Performance

Brian Alderman | MCT, CEO / Founder of MicroTechPoint

Tobias Ternstrom | Microsoft SQL Server Program Manager


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Querying Microsoft SQL Server 2012 Jump Start

05 | SET Operators, Windows Functions, and GroupingSET operators, Windows functions, GROUPING sets (PIVOT, UNPIVOT, CUBE, ROLLUP)

06 | Modifying DataINSERT, UPDATE, and DELETE statements, use of defaults, constraints, and triggers, OUTPUT

07 | Programming with T-SQLUsing T-SQL programming elements, implementing error handling, understanding and implementing transactions

08 | Retrieving SQL Server Metadata and Improving Query Performance

Querying system catalogs and dynamic management views creating and executing stored procedures improving SQL

Server query performance


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--Pre-filtered to exclude system objects

SELECT name,object_id,schema_id,type,type_desc

FROMsys.tables;

--Includes system and user objects

SELECTname,object_id,schema_id,type,type_descFROMsys.objects;


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Information schema views

SELECTTABLE_CATALOG, TABLE_SCHEMA,

TABLE_NAME, TABLE_TYPE

FROM INFORMATION_SCHEMA.TABLES;

SELECTVIEW_CATALOG,VIEW_SCHEMA,VIEW_NAME,

TABLE_CATALOG,TABLE_SCHEMA,TABLE_NAME,

COLUMN_NAME

FROMINFORMATION_SCHEMA.VIEW_COLUMN_USAGE;

SELECTVIEW_CATALOG,VIEW_SCHEMA,VIEW_NAME,

TABLE_CATALOG,TABLE_SCHEMA,TABLE_NAME,

COLUMN_NAME

FROMINFORMATION_SCHEMA.VIEW_COLUMN_USAGE

WHERECOLUMN_NAME = BusinessEntityID


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SELECT@@VERSIONASSQL_Version;

SELECTSERVERPROPERTY('ProductVersion')ASversion;

SELECTSERVERPROPERTY('Collation')AScollation;


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SELECTsession_id,login_time,program_name

FROMsys.dm_exec_sessions

WHEREis_user_process =1;

SELECTreferencing_schema_name,

referencing_entity_name,

referencing_class_desc

FROM sys.dm_sql_referencing_entities(

'Sales.SalesOrderHeader','OBJECT');GO


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Naming pattern Description

db Database-related informationexec Query execution-related information

io I/O statistics

os SQL Server Operating System (SQLOS) information

tran Transaction-related information


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--no parameters so lists all database

EXECsys.sp_databases;

--single parameter of name of table

EXECsys.sp_helpN'Sales.Customer';

--multiple named parameters

EXECsys.sp_tables

@table_name ='%',@table_owner =N'Sales';


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--This example uses EXEC, includes the sys schema name,

--and passes the table name as a named Unicode parameter

--to a procedure accepting an NVARCHAR(776)

--input parameter.

EXECsys.sp_help@objname =N'Sales.Customer';


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CREATEPROCEDUREProduction.ProdsByProductLine

(@numrows ASint,@ProdLine ASnchar)

ASSELECTTOP(@numrows)ProductID,

Name,ListPrice

FROM Production.Product

WHERE ProductLine =@ProdLine;

--Retrieve top 50 products with product line = M

EXECProduction.ProdsByProductLine 50, M


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Table scan: SQL Server reads all table rows

Index seek/scan: SQL Server uses indexes to find rows


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SETSTATISTICSTIMEON;

SETSTATISTICSIO ON;


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2013 Microsoft Corporation. All rights reserved. Microsoft, Windows, Office, Azure, System Center, Dynamics and other product names are or may be registered trademarks and/or trademarks in

the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because

Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information

provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, I MPLIED OR STATUTORY, AS TO THE I NFORMATION IN THIS PRESENTATION.

module_8 retrieving sql metadata and improving sql performanceod1.pptx

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