Reading and writing in Java
Reading and writing from and to files is not easy in Java. This can already be seen if one simply googles on “Java Filereader problem”. This generated 477000 hits. Apparently,…
Reading and writing from and to files is not easy in Java. This can already be seen if one simply googles on “Java Filereader problem”. This generated 477000 hits. Apparently,…
Another example on how mapper and reducers are used in a Hadoop context is given below. This programme is created as three classes. One class is an overall class that…
In my impression, the big development that takes place now in the world of Big Data is the creation of connectors. Such connectors enable us to continue using standard tools…
In a previous post, I showed the context diagramme. I then continued by saying that each of the arrows that flow to and fro the bubble in the middle can…
Just a little note. I discovered that one may access the 32 bit ODBC drivers on a 64 bit platform via: C:\Windows\SysWOW64\odbcad32.exe and the 64 bit ODBC drivers via: C:\Windows\System32\odbcad32.exe…
A major question with Teradata tables is what columns to choose when a primary index must be created. I understand that 4 different arguments might be used: 1: Is the…
I understand Teradata has a so-called fall back option. The idea is that data are stored twice; each record being stored to two different amps. I saw a nice picture…
I must confess I never heard of Dynamic SQL. But suddenly around me everyone started talking on Dynamic SQL. What is dynamic SQL? Dynamic SQL is a SQL statement that…
Teradata offers the user the choice whether of not a check is made on duplicate records. Let’s first look at some code that allows duplicate records to be inserted. The…
It is possible in SQL Server to create columns in a table that have different codepage. This can be shown in the table below. That table has two attributes: char_unicode…