Month: July 2018

Danger! Danger! Float value!

Danger! Danger! Float value!

I’m not saying that floating point numbers are the devil, and I’m not saying that the float data type should be avoided. But they should only be used when it’s entirely necessary and appropriate. The hidden danger of improper use can can become a ticking time bomb! Most (if not all) dangers come from FLOATs…

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Dates In Oracle: Ranges, Manipulation & Loops

Dates In Oracle: Ranges, Manipulation & Loops

Having spent a lot of time looking at dates in SQL Server, I thought I’d take some time to publish some notes on dates in Oracle. Most of the ideas are the same, but there are some subtleties. After my SQL Server articles: Dates In SQL Server: Managing & Manipulating Dates Dates In SQL Server:…

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Dates In SQL Server: Public Holidays

Dates In SQL Server: Public Holidays

For most business reporting, public holidays (or other special days) cary much business impact. Here are some ideas on solutions. It usually doesn’t take long with a data warehouse project before we want to enhance our calendar. Holidays aren’t built into DBMS systems by default, so we have to create our own solution. I feel…

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Dates In SQL Server: The last X of the month

Dates In SQL Server: The last X of the month

Finding the last X day of the month isn’t as easy as you might think. I learned this when people wanted to build a calendar for planning and automation. This is a neat addition to the article:┬áDates In SQL Server: Weekdays & Weekends Create sample date data From my previous article, the below SQL will…

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