SQL Pass Architecture SQL Tips & Tricks
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Tips & Tricks session Delivered on Jan 30, 2014 for the SQL Pass Architecture Group.
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SQL Pass Architecture SQL Tips & Tricks
- 1. Tips & Tricks with SQL Server Performance Tuning, SSRS, SSIS, and More! By Ike Ellis, MVP @ike_ellis www.ikeellis.com Blog.ikeellis.com http://www.linkedin.com/in/ikeellis Look for CraftingBytes – Coming Soon DevelopMentor SQL Pass Book Readers
- 2. 2
- 3. So you want to be great at SQL Server… SQL Server Integration Services SQL Server Analysis Services Tabular MultiDimensional SQL Server Reporting Services Excel Data Quality Services Service Broker Performance Tuning Indexing Query Plans Plan Analysis Memory Management SANs Network Clustering Availability Groups PowerShell Master Data Services Architecture Data Mart Design Data Normalization CDC NoSQL/BigData (At least the MS Cloud Offerings) Competitive Knowledge (Oracle, Tablaeu, QlickView, Postgres) ORMs(Entity Framework, Nhibernate, Micros) Installation/Configuration/Upgrading/Service Packing Power BI PowerMap PowerQuery PowerView PowerPivot T-SQL Querying Stored Procedures Functions Windowing Functions Aggregates CLR MDX DAX XMLA BCP SQL Azure Tooling Redgate SSMS SSDT Past Versions Central Management DacPacs/BacPacs Profiler/Extended Events Auditing Security/Encryption Replication SQLCMD
- 4. Tips From the SQL Consultant For the YouTube/Reddit/Chive/Cracked/Meme generation Lots of disjointed tips Popular mistakes I see or easy things I think you can take advantage of Between 3 – 5 minutes each Let’s see if we can get through all 20
- 5. Tip #1: SSIS for the Color Blind
- 6. Tip #2: Five minutes on report formatting = 10x more impressive Spend 10 minutes on design (as opposed to the zero we typically spend) Choose colors wisely • 99/100 - developers use the default color palette HTML color picker websites • http://www.lavishbootstrap.com MorgueFile • http://www.morguefile.com/
- 7. Life Tip: Start 2014 with a jar and fill it with notes of good things that happen Next New Year’s Eve, empty the jar and see what awesome stuff happened that year. 7
- 8. Tip #3: The right way to find hardware problems Merging PerfMon and Tracing Get the Batch and Completed Events Only Never trace from the computer you are monitoring Always trace to a file and then load in a table after. *Thanks, Grant! 8
- 9. Tip #4: Lifehack: Readable Presentations Take the average age of the people in your audience and divide by 2: That’s your font size USE THIS SIZE IF YOUR AUDIENCE IS 200
- 10. Tip #5: Check for heaps/clustered indexes SELECT t.[Name] FROM sys.Indexes i JOIN sys.Tables t ON t.Object_ID = i.Object_id WHERE i.type_desc = 'HEAP' ORDER BY t.[Name]
- 11. Tip #6: The proper way to run an SSIS package
- 12. Tip: More Visualization Tips 1 2
- 13. In nature, colors do two things: 1) Entice 2) Warn So let’s use them sparingly.. 1 3
- 15. Tip: ColorBrewer Cynthia Brewer did a fantastic job! 1 5
- 16. Tip #7: No reason to use ISNULL CONCAT! Messy vs clean code No + symbol needed No ISNULL needed
- 17. Life Tip: If you backpack, but need news, search Wikipedia by month & year 1 7
- 18. Tip #8: How to search schema F7 SQLSearch • • • • Free Download it! http://www.red-gate.com/products/sql-development/sql-search/ Did I mention it’s free? Dependency Tracker • Not Free, but still cool select object_name(object_id), definition as name from sys.all_sql_modules where definition like '%cust%' *THANKS HUGO!
- 19. Tip #9: Windowing Functions are pretty cool They are worth learning, and have a neat evolution
- 20. Tip #10: SSDT Search for options No more digging around in options Just search for everything
- 22. Tip #11: Scripting: You have two choices Two Choices • • Get good at boring repetitive tasks Get good at PowerShell & Scripting Who adds more value to their company or their customers? Who gets paid more?
- 23. Tip #12: TempDB Configuration Current thought is 4 logical processors to 1 file Just a good beginning, your mileage may very Start there, then go to 2:1 or 1:1 if necessary Trace Flag 1117 or autogrow off
- 24. Travel Tip: If you take a power strip to the air port during the winter, you’ll be a hero 2 4
- 25. Tip #13: Prettify! http://extras.sqlservercentral.com/prettifier/prettifier.aspx RedGate PlugIn for SQL Server Management Studio 25
- 26. Tip #14: Execute scripts over multiple servers? Super easy!
- 27. Tip #15: Life is so easy with a dates table Find the sales numbers for the first Monday of every month of the year T-SQL with no dates table T-SQL with dates table
- 28. Life Tip: Motorcyclist signaling cop to other motorcyclist 2 8
- 29. Tip #16: Try_Cast Avoiding terrible casting errors
- 30. Tip #17: Never reinvent the wheel Take SQL# for example Good Documentation Easy Syntax Cheap (and much of it is free)
- 31. Tip #18: Save scripts for easy access Lots of repetitive scripts with business logic No reason to write the same queries for the same tables day after day
- 33. Tip #19: Enforce Business Rules in the DB Foreign Keys Unique Constraints Check Constraints 33
- 34. Tip #20: Log, Log, Log (and beware of subscriptions) select c.Name , e.InstanceName , e.UserName , e.Parameters , e.TimeStart , e.TimeEnd , e.TimeDataRetrieval , e.TimeProcessing , e.TimeRendering from executionlog e join catalog c on e.reportid = c.ItemID Send a Link, or a file on a shared folder that you can audit. Find someway to audit who opened the link or the file in the folder. Try to avoid sending the PDF without a way to audit it.
- 35. SQL Sentry Plan Explorer 3 5
- 36. Ike Ellis http://blog.ikeellis.com http://www.ikeellis.com YouTube • http://www.youtube.com/user/IkeEllisData SQL Pass Book Readers • http://bookreaders.sqlpass.org/ San Diego Tech Immersion Group Twitter: @ike_ellis 619.922.9801 Email address is just my first name @ikeellis.com
- 37. Stay Involved! • Sign up for a free membership today at sqlpass.org • • • • Linked In: Professional Association for SQL Server Facebook: Professional Association for SQL Server Group Twitter: @SQLPASS The PASS Blog: sqlpass.org
Editor's Notes
- use tsql2012SELECT *FROMSales.customersgoselect * from sales.ordersgoselect top 100000 * from sales.orders, sales.customers
- update sales.customersset contacttitle = nullwhere custid in ('59', '66', '78', '15')use tsql2012select * from sales.customersselect ContactName+ ' - ' + ContactTitle+ ', ' + City as GreetingLinefrom sales.customersselect isnull(ContactName, '') + ' - ' + isnull(ContactTitle, '') + ', ' + isnull(City, '') as GreetingLinefrom sales.customersselect concat(ContactName, ' ', ContactTitle, ' ', City) as GreetingLinefrom sales.customers
- use tsql2012select * from sales.ordersselect custid, freightfrom sales.ordersselect custid, freight, sum(freight) as totalFreightfrom sales.ordersselect custid, sum(freight) as totalFreightfrom sales.ordersgroup by custidselect custid, freight, sum(freight) as totalFreightfrom sales.ordersgroup by custidselect custid, freight, sum(freight) as totalFreightfrom sales.ordersgroup by custid, freight--we're skipping subqueries, because they look ugly and --it insults me aesthetically;with FreightTotalas(select custid, sum(freight) as totalFreightfrom sales.ordersgroup by custid)select o.custid, o.freight, ft.totalFreight as totalFreightfrom sales.orders o join FreightTotalfton o.custid = ft.custid--BIG IMPROVEMENT--query can be executed independantly--Can be reused, like this;with FreightTotalas(select custid, sum(freight) as totalFreightfrom sales.ordersgroup by custid)select o.custid, o.freight, ft.totalFreight as totalFreight, o.freight /ft.totalfreight * 100 as FreightPercentagefrom sales.orders o join FreightTotalfton o.custid = ft.custid--but remember our original thought processselect custid, freight, sum(freight) as totalFreightfrom sales.orders--here's a windowing functionselect custid, freight, sum(freight) over (partition by custid) as totalFreightfrom sales.orders--and reusing it is not that big of a dealselect custid, freight, sum(freight) over (partition by custid) as totalFreight, freight / sum(freight) over (partition by custid) * 100 as FreightPercentagefrom sales.orders
- # We can narrow down the list by filtering on the source Get-EventLog Application | Where-Object {$_.Source -like '*sql*' ` -and $_.EntryType -eq "Error" ` -and $_.TimeGenerated -ge ((Get-Date).AddHours(-96)) ` } | Format-ListWrite-Host "Press any key to continue ..."$x = $host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")Write-HostWrite-Host "A"Write-Host "B"Write-Host "C"
- Case Statements, bad code, etc.--this isn’t joining a bunch of subqueries--these are nestestsubqueries….FAR DIFFERENTSELECT *FROM (SELECT urgency, name, phone, location, department, cc, status,case_manager,ip,case_manager_ei d,id_problem,id_problem_type,eid_author, title, body,date_created,date_modified FROM problems AS main INNER JOIN (SELECT id_problem as t_urgency_id_problem,node_value AS urgency FROM problem_nodes WHERE node_name = "urgency")t_urgency ON t_urgency.t_urgency_id_problem = main.id_problem INNER JOIN (SELECT id_problem as t_name_id_problem,node_value AS name FROM problem_nodes WHERE node_name = "name")t_name ON t_name.t_name_id_problem = main.id_problem INNER JOIN (SELECT id_problem as t_phone_id_problem,node_value AS phone FROM problem_nodes WHERE node_name = "phone")t_phone ON t_phone.t_phone_id_problem = main.id_problem INNER JOIN (SELECT id_problem as t_location_id_problem,node_value AS location FROM problem_nodes WHERE node_name = "location")t_location ON t_location.t_location_id_problem = main.id_problem INNER JOIN (SELECT id_problem as t_department_id_problem,node_value AS department FROM problem_nodes WHERE node_name = "department")t_department ON t_department.t_department_id_problem = main.id_problem INNER JOIN (SELECT id_problem as t_cc_id_problem,node_value AS cc FROM problem_nodes WHERE node_name = "cc")t_cc ON t_cc.t_cc_id_problem = main.id_problem INNER JOIN (SELECT id_problem as t_status_id_problem,node_value AS status FROM problem_nodes WHERE node_name = "status")t_status ON t_status.t_status_id_problem = main.id_problem INNER JOIN (SELECT id_problem as t_case_manager_id_problem,node_value AS case_manager FROM problem_nodes WHERE node_name = "case_manager")t_case_manager ON t_case_manager.t_case_manager_id_problem = main.id_problem INNER JOIN (SELECT id_problem as t_ip_id_problem,node_value AS ip FROM problem_nodes WHERE node_name = "ip")t_ip ON t_ip.t_ip_id_problem = main.id_problem INNER JOIN (SELECT id_problem as t_case_manager_eid_id_problem,node_value AS case_manager_eid FROM problem_nodes WHERE node_name = "case_manager_eid")t_case_manager_eid ON t_case_manager_eid.t_case_manager_eid_id_problem =main.id_problem)t
- ;with FirstMondaysas(Select DateAdd(day, (9-DatePart(weekday, DateAdd(Month, 1+DateDiff(Month, 0, '12/1/2009'), 0)))%7, DateAdd(Month, 1+DateDiff(Month, 0, '12/1/2009'), 0)) as FirstMondayunion allselect DateAdd(day, (9-DatePart(weekday, DateAdd(Month, 1+DateDiff(Month, 0, FirstMonday), 0)))%7, DateAdd(Month, 1+DateDiff(Month, 0, FirstMonday), 0)) from FirstMondayswhere firstMonday <= '12/1/2010')select * from FirstMondaysuse adventureworksdw2012select EnglishMonthName, min(datekey) from dimdatewhere englishdaynameofweek = 'monday'and calendaryear = '2010'group by EnglishMonthName, MonthNumberOfYearorder by MonthNumberOfYear
- create table t1(col1 varchar(100))insert into t1(col1)values('1'),('2'),('3'),('ike'),('1'),('2'),('3'),('ike'), ('1'),('2'),('3'),('ike')select cast(col1 as int) from t1select try_cast(col1 as int) from t1
- SELECT SQL#.Date_Format('2009-12-03 12:45:56.345', 'D', '') -- Thursday, December 03, 2009SELECT SQL#.Date_Format('2009-12-03 12:45:56.345', 'D', 'de') SELECT SQL#.Date_Format('2009-12-03 12:45:56.345', 'D', 'fr-fr') -- jeudi 3 décembre 2009 SELECT SQL#.Date_Format('2009-12-03 12:45:56.345', 'dd', '') -- 03 SELECT SQL#.Date_Format('2009-12-03 12:45:56.345', 'dd-MMM', '') SELECT SQL#.Date_Format('2009-12-03 12:45:56.345', 'tt', 'ja-jp') -- 午後 SELECT SQL#.Math_IsPrime(12318237133333)
- Watch the actual execution plan for these statements:drop table dbo.t1drop table dbo.t2--create two test tablescreate table dbo.t1(c1 int, c2 int check(c2 between 10 and 20));insert into dbo.t1values (11,12);create table dbo.t2(c1 int, c2 int);goinsert into dbo.t2values(101, 102);go select t1.c1 , t2.c2 , t2.c2 from dbo.t1 join dbo.t2 on t1.c1 = t2.c2 and t1.c2 = 20;select t1.c1 , t1.c2 , t2.c2 from dbo.t1 join dbo.t2 on t1.c1 = t2.c2 and t1.c2 = 30;
- DBCC OPENTRANselect s.plan_handle , t.text , sum(s.execution_count) as totalExecutionCount , sum(s.total_elapsed_time) as totalElapsedTime , sum(s.total_worker_time) as totalWorkerTime , sum(s.total_logical_reads) as totalLogicalReads , sum(s.total_logical_writes) as totalLogicalWrites from sys.dm_exec_query_stats s cross apply sys.dm_exec_sql_text(s.plan_handle) t group by s.plan_handle, t.text order by sum(s.execution_count) desc
- A common table expression (CTE) can be thought of as a temporary result set that is defined within the execution scope of a single SELECT, INSERT, UPDATE, DELETE, or CREATE VIEW statement. A CTE is similar to a derived table in that it is not stored as an object and lasts only for the duration of the query. Unlike a derived table, a CTE can be self-referencing and can be referenced multiple times in the same query.A CTE is made up of an expression name representing the CTE, an optional column list, and a query defining the CTE. After a CTE is defined, it can be referenced like a table or view can in a SELECT, INSERT, UPDATE, or DELETE statement. A CTE can also be used in a CREATE VIEW statement as part of its defining SELECT statement. A CTE can be used to: Create a recursive query.Substitute for a view when the general use of a view is not required; that is, you do not have to store the definition in metadata.Enable grouping by a column that is derived from a scalar subselect, or a function that is either not deterministic or has external access.Reference the resulting table multiple times in the same statement.ReferencesUsing Common Table Expressions: http://go.microsoft.com/fwlink/?LinkID=127330