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In This Issue |
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From the SQLServerCentral Blogs -
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Editorial - Building Better Software |
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Why is programming so hard, especially on seemingly simple problems. Here's a short piece on the Apple iOS6 Do Not Disturb bug that surprised me. The bug is fixed, as of Jan 7, because it was a date issue. According to the article, the programmers that implemented the Do Not Disturb function used the ISO calendaring dates, which do not work as expected this year. The details are in the article, and it reads like an edge case, but it's not one I'd expect to have slipped by Apple's QA department. These types of programming errors seem to regularly slip by developers. The situation has gotten better since the days of VB6 when it seemed everyone that could complete a week long course was building buggy applications at a frightening rate. While I still think there are plenty of hack developers out there, it seems that with all the publication and information available, there are better programs being built in many organizations. However simple bugs can still slip through. The maintenance plan bug in SQL Server 2005 showed Microsoft that there's no such thing as a simple fix or patch. In this case, even the Apple documentation for developers (Fixed Format section) notes that the ISO date should not take precedence when there is a conflict. Apparently not all of Apple's developers are following their own documentation. Developing software is easy to do, but hard to get right, especially when you are building software that you expect to last a long time and get used in a variety of ways. Experience, practice, learning from your mistakes, and a deep understanding of the business you are working in help developers write better software over time. It's a reason why you should ensure you work to retain your talented developers. They are much harder to replace than the lines of code they produce. A new developer may produce the same amount of work in a short period, but I'd wager they produce many more bugs as well. » Join the debate, and respond to today's editorial on the forums The Voice of the DBA PodcastsWe publish three versions of the podcast each day for you to enjoy.
The podcast feeds are available at sqlservercentral.mevio.com. Comments are definitely appreciated and wanted, and you can get feeds from there. Overall RSS Feed: Today's podcast features music by Everyday Jones. No relation, but I stumbled on to them and really like the music. Support this great duo at www.everydayjones.com.
You can also follow Steve Jones on Twitter: » To submit an article, rant or editorial, log in to the Contribution Center |
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Question of the Day |
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Today's Question:
USE tempdb
CREATE TABLE dbo.MyTable
(
MyTableID INT NOT NULL IDENTITY (1, 1),
SomeText VARCHAR(100)
);
INSERT INTO dbo.MyTable
(SomeText)
VALUES ('qwerty');
DBCC CHECKIDENT ('dbo.MyTable', RESEED, 100);
INSERT INTO dbo.MyTable
(SomeText)
VALUES ('uiop');
SELECT MyTableID
FROM dbo.MyTable;
Which two values are returned? Assume this is SQL Server 2012. Think you know the answer? Click here, and find out if you are right. This question is worth 1 point in this category: T-SQL. We keep track of your score to give you bragging rights against your peers. We'd love to give you credit for your own question and answer. To submit a QOD, simply log in to Contribution Center. |
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SQL Server 2012 Query Performance Tuning SQL Server 2012 Query Performance Tuning leads you through understanding the causes of poor performance, how to identify them, and how to fix them. You’ll learn to be proactive in establishing performance baselines using tools like Performance Monitor and Extended Events. You’ll learn to recognize bottlenecks and defuse them before the phone rings. You’ll learn some quick solutions too, but emphasis is on designing for performance and getting it right, and upon heading off trouble before it occurs. Delight your users. Silence that ringing phone. Put the principles and lessons from SQL Server 2012 Query Performance Tuning into practice today. Get your copy from Amazon today. |
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Yesterday's Question of the Day |
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What is output of these statements? DECLARE @BIT BIT SET @BIT = 'TRUE' IF ISNULL(COALESCE(@BIT,NULL),NULL) is NULL SELECT 'Output 1' IF NOT EXISTS (SELECT 1 WHERE @BIT IS NOT NULL) SELECT 'Output 2' IF EXISTS (SELECT 1 WHERE @BIT IS NULL) SELECT 'Output 3'
Answer: Answer: Nothing is output Explanation: In all three cases the IF evaluates to 'FALSE' so the SELECT does not execute. Reference: http://technet.microsoft.com/en-us/library/ms182587.aspx |
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You learn a lot when thrown into a crisis situation, where everyone is looking to you for answers. The system is down, the CEO is pleading to you for answers as the each minute cuts the company’s bottom line. When you are in a hurry, you need some new ideas right away. This book is your helpful tool. When used correctly, you can determine solutions and even related solutions to simple (yet lesser known) areas of SQL Server. Learn what causes SQL tasks to wait or site in queues. Even if your system is not in trouble right now, you can use what you will learn in this book to view the history of wait statistics. Pick up your copy of this great book from Amazon today. |
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Featured Script |
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Check Candidate Columns for NOT NULL ConstraintsThis script reports table columns that allow NULL values but that currently have no NULL values, making them candidates for adding a NOT NULL constraint. More » |
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Database Pros Who Need Your Help! |
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Moving Datab from one datafile to another - Hi All, We have one database with 3TB of size, with 6 Data files and 2 Transactional log files. Due to... Calculating Median, Max, Min, Lower Quartile and Upper Quartile for a Boxchart? - Hi All - My boss asked me to create a boxchart using SSRS for some of our data. I read articles... Nested replaces ? - Hello all, At this moment I need some nested REPLACE actions. Some time ago I saw a set of routines for string... Unable to install sql server 2008 Management studio - Dear Sir/Madam, I downloaded Visual Studio 2010 from microsoft so its automatically installed sql server 2008 R2. In Sql server 2008... Importing a csv file into a database - inserts quotes automatically into every field - We are using a SSIS package to insert a series of CSV files (saved in excel) into a database table. The... 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Need Alternate Solution - Hi, I Created Function For Indian Money Format [code="sql"] CREATE function [dbo].[Fn_Indian_Money_Format] ( @amount MONEY ) RETURNS VARCHAR(50) AS BEGIN DECLARE @charMoney VARCHAR(50), @RemainingChar... Problem with CAST to VARCHAR with SUBSTRING Function - I'm haveing trouble with a simple CAST to VARCHAR Statement. [code="sql"] SELECT CASE WHEN CAST(LEFT(Customer.STARTDATE, 2 AS VARCHAR(2))) = '98' THEN CAST(substring(Customer.STARTDATE, 3,... Trying to understand ISDATE & CAST behavior - I am trying to understand why the case statement is failing... [code="sql"] create table #DateTest (col1 varchar(55), col2 varchar(255) ) insert into #DateTest(col1,... SQL Server 2008 : Working with OracleNeed help - MS SQL Trigger for Oracle insert - Hi, is it possible to use a ms sql trigger to insert a row in Oracle Table ? I use this way... Performance of a Query : which one is giving good performace - Hi Please help me... 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Capturing Baselines on SQL Server: Where's My Space?
Troubleshooting SQL Server RESOURCE_SEMAPHORE Waittype Memory Issues
How Do You Query Maintenance Plan Package Metadata?
SQL Wait Stats Joes 2 Pros