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Articles with tag T-SQL Rss

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   Items 1 to 20 of 1319    Older >>
 

T-SQL Window Functions and Performance

T-SQL window functions, introduced in 2005 with enhancements in 2012, are great additions to the T-SQL language. In this article, Kathi Kellenberger explains what you need to know to get good performance when using these functions.  Read more...
By Additional Articles 2018/07/16 | Source: SimpleTalk | Category: t-sql
Rating: (not yet rated)  Rate this |   Briefcase | 1,529 reads

Generating Completely Random Sample Output from a Dataset

This short article shows a simple example of how to generate completely random sample output from a Dataset  Read more...
By Adam Aspin 2018/07/12 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 607 reads

Ensuring Each Client has a Full Set of Key-Value Pairs

In this piece, we find out about a business issue that can occur when using key value pairs in your database to describe information about other entities.  Read more...
By Steve Jones 2018/07/10 | Source: SQLServerCentral.com | Category: data integrity
Rating: |  Discuss |   Briefcase | 509 reads

Creating Compound Interest Calculations in SQL

This is the first article in a short series of SQL Server query challenges to test and expand your SQL Server querying skills  Read more...
By Adam Aspin 2018/07/05 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 933 reads

Using Parameters for SQL Server Queries and Stored Procedures

One of the benefits of SQL is the ability to write a query and use parameters to dynamically act upon the resultset. Depending on the situation, there can be benefits to parameterizing queries, but it is not always clear when or how to do this. In this tip we look at different ways to pass in values as parameters to queries and the advantages and disadvantages.  Read more...
By Additional Articles 2018/07/05 | Source: MSSQLTips.com | Category: parameters
Rating: (not yet rated)  Rate this |   Briefcase | 3,259 reads

The OUTPUT Clause for INSERT and DELETE Statements

In this article, I will provide a set of examples to show case the use of OUTPUT clause for INSERT and DELETE statements.  Read more...
By Amarendra Reddy Thummeti 2018/06/28 (first published: 2017/05/25) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 6,021 reads

Introduction to T-SQL Window Functions

T-SQL window functions were introduced in 2005 with more functionality added in 2012. Many database professionals are not aware of these useful functions. In this article, Kathi Kellenberger provides a quick overview of just what a window function is as well as examples of each type of function.  Read more...
By Additional Articles 2018/06/28 | Source: SimpleTalk | Category: window functions
Rating: (not yet rated)  Rate this |   Briefcase | 4,000 reads

Common Mistakes

This week Steve Jones is wondering what the common mistakes that T-SQL developers make are.  Read more...
By Steve Jones 2018/06/22 | Source: SQLServerCentral.com | Category: editorial
Rating: |  Discuss |   Briefcase | 495 reads

Quick Tips For Debugging Large Stored Procedures

SSMS is a good management tool, but it’s not a good development tool. When you’re writing some simple queries, it’s fine. When you’re writing code with lots of branching, dynamic SQL, temp tables, error handling, and so on… Not so much. Here are some tips Erik darling has put together after a couple years of wrangling the Blitz scripts in the First Responder Kit.  Read more...
By Additional Articles 2018/06/01 | Source: Brent Ozar Unlimited Blog | Category: t-sql
Rating: (not yet rated)  Rate this |   Briefcase | 4,720 reads

TRY_CONVERT

An introduction to the TRY_CONVERT function, introduced in SQL Server 2012.  Read more...
By Matthew McGiffen 2018/05/29 | Source: SQLServerCentral.com | Category: try_convert()
Rating: |  Discuss |   Briefcase | 1,896 reads

One Million Tables

A quick experiment to create one million tables in a database.  Read more...
By Steve Jones 2018/05/10 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 1,332 reads

Friday the 13th

Looking forward to the next few ones of these scary days?  Read more...
By Jan Van der Eecken 2018/05/07 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 848 reads

Random Word Generation for Data Scrubbing

With HIPAA and GDPR requiring your careful scrubbing of data for lower environments, random word generation promises to be a huge helper. Read here how to do it.  Read more...
By John F. Tamburo 2018/05/01 | Source: SQLServerCentral.com | Category: rand()
Rating: |  Discuss |   Briefcase | 1,135 reads

SQL Server Closure Tables

SQL Server has a couple of different ways to represent hierarchies, but they do not allow storing any additional information that is important to the relationship between objects. In this article, Phil Factor explains how to use closure tables to overcome this deficiency.  Read more...
By Additional Articles 2018/04/27 | Source: SimpleTalk | Category: t-sql
Rating: (not yet rated)  Rate this |   Briefcase | 3,616 reads

Using T-SQL to Detect Stock Price Reversals with the RSI

Rick Dobson explains the Relative Strength Index (RSI), and shows how to create a TSQL script that computes the RSI for a stock closing price series.  Read more...
By Additional Articles 2018/04/16 | Source: MSSQLTips.com | Category: t-sql
Rating: (not yet rated)  Rate this |   Briefcase | 2,973 reads

TRIM() in T-SQL

The T-SQL language expanded in SQL Server 2017 with the TRIM() function.  Read more...
By Steve Jones 2018/04/10 | Source: SQLServerCentral.com | Category: trim()
Rating: |  Discuss |   Briefcase | 1,869 reads

Avoiding Unexpected Results with DATEDIFF in Year Comparisons

Learn how to avoid unexpected results when using the DATEDIFF function to find the difference between two dates in years.  Read more...
By David Strack 2018/04/09 | Source: SQLServerCentral.com | Category: sql server
Rating: |  Discuss |   Briefcase | 1,335 reads

Storing a variable with a SELECT, and why it didn't work.

Using SELECT to store values into variables is an important technique, but you need to know some of the gotchas as well.  Read more...
By Kenneth Fisher 2018/04/02 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 1,807 reads

When to use the SELECT…INTO statement

SELECT…INTO is a good way of making a table-source temporarily persistent as part of a process, if you don’t care about constraints, indexes or special columns.  Read more...
By 2018/03/30 | Source: Redgate | Category: t-sql
Rating: (not yet rated)  Rate this |   Briefcase | 5,545 reads

Get Set For Speed

Loops are common in application code, but set-based solutions are the way to go with SQL.  Read more...
By Tom Staab 2018/02/23 (first published: 2015/12/29) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 6,140 reads
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