ChannelDB2

January 2009 Blog Posts (4)

SQL weaknesses on Database Processing

Hi,



I invite you all to visit my website that has a book about the weaknesses SQL has on Database Processing. All the examples had been tested in DB2, but the situation is practically the same and in some cases still worse in other SQL DBMS. This publication explains aspects related to:



• Equivalent queries may produce different results.

• Aggregation operators like SUM, AVG, etc. doesn’t generate the correct calculation in certain cases.

• Query tables that have… Continue

Added by Oswaldo F. Domejean on January 18, 2009 at 12:11pm — No Comments

It's the end of the shipping saga. The package showed up at the house. The package tracking can now tell the tale. The package came from Shanghai, China. It was sent out from Shanghai on January 8 an…

It's the end of the shipping saga. The package showed up at the house. The package tracking can now tell the tale. The package came from Shanghai, China. It was sent out from Shanghai on January 8 and arrived in Ontario, California on the same day, nearly the same time, due to time zone changes. Then it sat in customs for 6 or seven days, and finally to Oakland, and delivery here in San Jose today.



Now it's time to find out if the result is worth the worry and the wait. The package… Continue

Added by Roger Miller on January 15, 2009 at 5:14pm — No Comments

The saga continues, with lots of music while waiting for someone to talk to. Now the bill has arrived, but nothing resembling a package or a tracking number. Express shipping must mean something very…

The saga continues, with lots of music while waiting for someone to talk to. Now the bill has arrived, but nothing resembling a package or a tracking number. Express shipping must mean something very different. It has been 20 days since I ordered, and I want is my money back. This is feeling like theft or fraud.



Would you believe shipping on the 6th, not arriving by the 15th with second day air service? I got a customer service representative in North Carolina who indicates that this… Continue

Added by Roger Miller on January 15, 2009 at 11:00am — No Comments

I'm purchasing a new Lenovo X200 laptop for myself. This is one of the most frustrating experiences I have ever had in online shopping. I placed the order December 27. When I ordered, I asked for sec…

I'm purchasing a new Lenovo X200 laptop for myself. This is one of the most frustrating experiences I have ever had in online shopping. I placed the order December 27. When I ordered, I asked for second day shipping. What the web does not say is to expect 10 working days to ship the machine before the 2 or 5 days of shipping. So I waited.



Now, the shipment lists a tracking number, but the tracking number is wrong. The date is January 14, 19 days later, and either they shipped the… Continue

Added by Roger Miller on January 14, 2009 at 3:56pm — No Comments

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