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Articles with tag T-SQL Rss

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   Items 1 to 20 of 1164    Older >>
 

Outer Join – What am I missing (SQL Spackle)

This article shows how to find missing rows in a table using a outer join.   Read more...
By Patrick Cahill 2015/02/27 (first published: 2013/11/12) | Source: SQLServerCentral.com | Category: outer joins
Rating: |  Discuss |   Briefcase | 19,533 reads

The Potential of Joins

An article about how we underestimate the power of joins and degrade our query performance by not using proper joins  Read more...
By Ashutosh Pandey 2015/02/26 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 7,986 reads

Dynamically Query a 100 Million Row Table-Efficiently

This article describes methods of creating dynamic queries without the use of dynamic SQL to efficiently access large tables.  Read more...
By Gary Strange 2015/02/24 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 14,651 reads

Questions About T-SQL Control-of-Flow Language You Were Too Shy to Ask

Surely, we all know how T-SQL Control-of-flow language works? In fact it is surprisingly easy to get caught out. What, for example, do the BREAK, RETURN and CONTINUE keywords do in their various contexts? Robert Sheldon has the answers to this and other questions.  Read more...
By Additional Articles 2015/02/10 | Source: SimpleTalk | Category: t-sql
Rating:  Rate this |   Briefcase | 9,610 reads

Performance of the SQL MERGE vs. INSERT/UPDATE

The SQL MERGE statement offers convenience, safety and elegance, but how does it perform compared to other methods?  Read more...
By Dwain Camps 2015/02/06 (first published: 2013/10/28) | Source: SQLServerCentral.com | Category: merge
Rating: |  Discuss |   Briefcase | 29,415 reads

Using a column name in a COUNT function

Putting a column name in a COUNT() function may not always give you what you are looking for.  Read more...
By Charles Kincaid 2015/01/30 (first published: 2013/10/15) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 26,373 reads

Removing Duplicates

How to remove identify and remove duplicate data from your tables  Read more...
By Sioban Krzywicki 2015/01/23 (first published: 2013/10/08) | Source: SQLServerCentral.com | Category: duplicate data
Rating: |  Discuss |   Briefcase | 28,209 reads

Using EXCEPT to Determine Row Differences

How to use the EXCEPT statement to perform row differences.  Read more...
By M. Douglas Bowan II 2015/01/09 (first published: 2014/03/25) | Source: SQLServerCentral.com | Category: except
Rating: |  Discuss |   Briefcase | 29,827 reads

Parsing HTML to SQL using SQLDOM

It is simple to parse HTML directly to SQL, manipulate, and render back to HTML using SQLDOM  Read more...
By David Rueter 2014/12/26 (first published: 2012/04/16) | Source: SQLServerCentral.com | Category: html
Rating: |  Discuss |   Briefcase | 14,440 reads

Linked lists

Learn how you can achieve better performance with linked list instead of a numbering column.  Read more...
By Andreas Bartels 2014/12/22 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 5,863 reads

Questions About T-SQL Transaction Isolation Levels You Were Too Shy to Ask

Every time you access a relational database to make a query, you have an important decision to make: What is the appropriate isolation level for your query? If you get this wrong, the consequences can be serious. Deadlocks, Dirty reads, Non-repeatable reads, or poor performance. We're in luck, because Robert Sheldon once more answers those questions that are awkward to ask in public.  Read more...
By Additional Articles 2014/12/18 | Source: SimpleTalk | Category: t-sql
Rating:  Rate this |   Briefcase | 10,082 reads

Stairway to Advanced T-SQL Level 1: Introduction to Advanced Transact SQL Stairway and Using the CROSS JOIN Operator

The first installment of this new stairway series will be discuss the CROSS JOIN operator. This stairway should help readers prepare for passing the Microsoft Certification exam 70-461: Querying Microsoft SQL Server 2012.  Read more...
By Gregory Larsen 2014/12/17 | Source: SQLServerCentral.com | Category: stairway series
Rating: |  Discuss |   Briefcase | 9,343 reads

The SQL Scrabble Puzzle

An enhancement to a Phil Factor puzzle gives you a chance to play scrabble in T-SQL.  Read more...
By Additional Articles 2014/12/05 | Source: Other | Category: contest
Rating:  Rate this |   Briefcase | 7,623 reads

Dynamic PIVOT CLR

Learn how yo can use a SQL-CLR procedure to handle all your PIVOT queries.  Read more...
By Eric Wahner 2014/11/28 (first published: 2012/12/06) | Source: SQLServerCentral.com | Category: .net
Rating: |  Discuss |   Briefcase | 15,794 reads

Real World T-SQL Tricks

This week Steve Jones wonders if you're taking advantage of the changes in the T-SQL language.  Read more...
By Steve Jones 2014/11/21 | Source: SQLServerCentral.com | Category: editorial
Rating: (not yet rated) |  Discuss |   Briefcase | 597 reads

Questions About Using TSQL to Import Excel Data You Were Too Shy to Ask

It is easy to import Excel data into database tables via TSQL, using OLEDB, either by the OPENROWSET function or linking to the spreadsheet as a server. The problem is that there are certain things that aren't obvious that you need to know about.  Read more...
By Additional Articles 2014/11/21 | Source: SimpleTalk | Category: t-sql
Rating:  Rate this |   Briefcase | 9,907 reads

Exploring Your SQL Server Databases with T-SQL

Scott Swanberg shares 38 scripts he uses time and time again for discovering more about database objects.  Read more...
By Additional Articles 2014/10/21 | Source: SimpleTalk | Category: t-sql
Rating:  Rate this |   Briefcase | 10,515 reads

Filling In Missing Values Using the T-SQL Window Frame

Since SQL Server delivered the entire range of window functions, there has been far less justification for using the non-standard ex-Sybase 'Quirky Update' tricks to perform the many permutations of running totals in SQL Server. One of these related problems is the 'Data Smear'. Do window functions make this easier, and what is performance like? Dwain Camps investigates.  Read more...
By Additional Articles 2014/10/01 | Source: SimpleTalk | Category: t-sql
Rating:  Rate this |   Briefcase | 10,286 reads

Hierarchies on Steroids #1: Convert an Adjacency List to Nested Sets

SQL Server MVP Jeff Moden shows us a new very high performance method to convert an "Adjacency List" to “Nested Sets” on a million node hierarchy in less than a minute and 100,000 nodes in just seconds. Not surprisingly, the "steroids" come in a bottle labeled "Tally Table".  Read more...
By Jeff Moden 2014/09/19 (first published: 2012/11/13) | Source: SQLServerCentral.com | Category: hierarchy
Rating: |  Discuss |   Briefcase | 16,074 reads

Splitting Strings Based on Patterns

Splitting strings based on patterns supported by LIKE and PATINDEX can be an interesting way to address a wide variety of problems.  Read more...
By Dwain Camps 2014/09/12 (first published: 2012/11/29) | Source: SQLServerCentral.com | Category: string manipulation
Rating: |  Discuss |   Briefcase | 18,835 reads
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