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Articles with tag advanced querying Rss

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   Items 1 to 20 of 207    Older >>
 

Hidden RBAR: Triangular Joins

Just because it looks set based, doesn't mean it is. T-SQL Crackerjack Jeff Moden takes a look at a mistake that many query writers make.  Read more...
By Jeff Moden 2009/01/16 (first published: 2007/12/06) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 50,939 reads

Hidden RBAR: Triangular Joins

Just because it looks set based, doesn't mean it is. T-SQL Crackerjack Jeff Moden takes a look at a mistake that many query writers make.  Read more...
By Jeff Moden 2009/01/16 (first published: 2007/12/06) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 50,939 reads

Everybody Reports to Somebody

One of the very common questions posted about T-SQL is how to traverse a hierarchy in a set based manner. New author Craig Hatley brings us his techniques for handling the common scenario of employees and managers.   Read more...
By Craig Hatley 2007/06/04 | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 5,679 reads

Converting Hexadecimal String Values to Alpha (ASCII) Strings

In an interesting exercise in data conversion, Stephen Lasham brings us a nice article on basic manipulations.   Read more...
By Stephen Lasham 2007/05/17 | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 10,884 reads

CASE function in SQL Server – part II

Part I of this series illustrated how to use simple case functions in queries. This installment discusses how to use case functions in different types of scenarios.  Read more...
By Additional Articles 2007/04/12 | Source: Database Journal | Category: advanced querying
Rating:  Rate this |   Briefcase | 9,414 reads

Gotcha! SQL Aggregate Functions and NULL

Working with NULL functions can be tricky in T-SQL and SQL Server 2000. If you add in aggregates, you need to be sure you understand what the behavior will be or you might report incorrect values to a user. Michael Coles has written a new article that talks about how NULL affects your results.   Read more...
By Michael Coles 2008/04/04 (first published: 2005/07/05) | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 86,656 reads

Why Read-only Table Parameters is Not Enough

In this article I discuss a new feature in SQL 2008, table-valued parameters and particularly the restriction that they have to be read-only. I argue that this makes this feature considerably less useful that it could be, and that in order to build scalable applications be able to pass read-write table parameters between stored procedures is essential.  Read more...
Rating:  Rate this |   Briefcase | 1,971 reads

Four Rules for NULLs

In SQL Server 2000 or any relational database, the concept of NULL can be both confusing and hazardess to your employment. Not understanding how to work with NULLs can lead to incorrect responses to queries and poor business decisions being made. New author Michael Coles brings us four rules that can help you work with NULL values in your tables.   Read more...
By Michael Coles 2008/03/28 (first published: 2005/06/27) | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 88,299 reads

The Truth Table

Truth tables are an important part of working with logical values in SQL Server. Yousef Ekhtiari brings us some T-SQL that can help you construct those many variable truth tables and ensure you are getting the results you expect.   Read more...
By Yousef Ekhtiari 2007/04/19 | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 10,610 reads

Keyword Searching in SQL Server

Have you ever wanted to ensure that keywords in your data are easily searchable? Have you struggled with full-text search? New author Michael Ahmadi brings us an interesting idea for a keyword tracking and searching subsystem based on T-SQL and triggers.   Read more...
By Michael Ahmadi 2007/04/09 | Source: SQLServerCentral.com | Category: miscellaneous
Rating: |  Discuss |   Briefcase | 10,383 reads

Storing IPs in SQL Server

An IP address is something we all recognize and is a piece of data that is quite prevalent in many systems. However it is a piece of data tha presents some challenges in its storage and retrieval. SQL Server guru David Poole presents us with a look at how you can work with this strange formatting.   Read more...
By David Poole 2007/04/02 | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 13,959 reads

The ARRAY In SQL Server 2000

SQL Server 2000 and Transact-SQL have many features, but one of the most often asked for features has been the implementation of some sort of array data type. This basic programming concept is notably absent from the development platform and results in many headaches and frustrations for DBAs. New author Alex Grinberg brings us his techniques for simulating arrays in SQL Server 2000.   Read more...
By Alex Grinberg 2008/02/15 (first published: 2005/05/16) | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 141,488 reads

Generating Missing Dates and Numbers

Finding missing data in a sequence of numbers or dates is a common request of DBAs. Regular author Jacob Sebastian brings us a new article that shows just how you can do this.  Read more...
By Jacob Sebastian 2008/02/06 | Category: datetime manipulation
Rating: |  Discuss |   Briefcase | 8,085 reads

Tame Those Strings - Finding Carriage Returns

Expanding on his series of string manipulation in T-SQL, Steve Jones takes a look at how you go about removing those unseen characters from your strings.   Read more...
By Steve Jones 2007/02/13 | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 12,414 reads

Solving the "Running Total" & "Ordinal Rank" Problems in SS 2k/2k5

Learn how to solve a couple of common T-SQL issues with MVP Jeff Moden.  Read more...
By Jeff Moden 2008/01/31 | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 15,186 reads

NULL Versus NULL?

Dealing with NULL data is something that often confuses new SQL Server developers, but even experienced DBAs might not understand all the intricacies of NULL operations. In a follow up to his highly acclaimed Four Rules of Null article, Michael Coles brings us a few new tricks with NULLs.   Read more...
By Michael Coles 2007/10/05 (first published: 2007/02/26) | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 37,490 reads

When To Use Cursors

Most SQL Server DBAs have been taught that cursors are bad and should not be used. However there are some cases and places where they might be useful. SQL Server guru Andy Warren brings us an example of where they may be handy.   Read more...
By Andy Warren 2007/01/15 | Source: SQLServerCentral.com | Category: advanced querying
Rating: |  Discuss |   Briefcase | 16,739 reads

Performance Tuning: Concatenation Functions and Some Tuning Myths

Rumor has it that Concatenation functions have gotten the nasty reputation of being "performance hogs". Here's why that's not true.  Read more...
By Jeff Moden 2008/01/01 | Source: SQLServerCentral.com | Category: test data
Rating: |  Discuss |   Briefcase | 15,364 reads

Creative Ways to Use the TOP Clause

Gregory Larsen discusses how to use the TOP clause to help solve requests where you want to restrict the number of records returned based on a record count.  Read more...
By Additional Articles 2007/01/05 | Source: Database Journal | Category: advanced querying
Rating:  Rate this |   Briefcase | 7,846 reads

Hidden RBAR: Triangular Joins

Just because it looks set based, doesn't mean it is. T-SQL Crackerjack Jeff Moden takes a look at a mistake that many query writers make.  Read more...
By Jeff Moden 2009/01/16 (first published: 2007/12/06) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 50,939 reads
   Items 1 to 20 of 207    Older >>