troubleshooting Question
Oracle Vs. SQL Server Computed / Virtual Columns
I was trolling around reading various articles and ran into the following link:
http://devcorner.georgievi.net/pages/database/oracle_database/oracle_tips/virtual-columns-oracle
In short, it goes into introducing a virtual column in Oracle 11g. I did not realize that this feature would be a new feature as I had been using something similar in SQL Server for some time to either create a placeholder column with a default value that would later be used or contain a computed value as a solution to a calculation that generates a value to be stored in that named field.
The question I have is, Lets say in SQL Server I do:
SELECT
TableID,
0 AS MyCustomColumnName
FROM TableName
In both Oracle and SQL Server, are these known as virtual columns or do they have different names between the 2 platforms? What are the differences between doing t his in either platform if any?
The article mentions:
You should keep in mind that:
virtual columns may not reference other virtual columns;
virtual columns only within the containing table. You cannot reference columns within other tables.
So that does that mean in a package in oracle where multiple stored procedures are created and ran, that one computed column value cannot be referenced from another stored procedure? I am interested in hearing about both platforms but my preference at this point in time leans more to the oracle side.
http://devcorner.georgievi.net/pages/database/oracle_database/oracle_tips/virtual-columns-oracle
In short, it goes into introducing a virtual column in Oracle 11g. I did not realize that this feature would be a new feature as I had been using something similar in SQL Server for some time to either create a placeholder column with a default value that would later be used or contain a computed value as a solution to a calculation that generates a value to be stored in that named field.
The question I have is, Lets say in SQL Server I do:
SELECT
TableID,
0 AS MyCustomColumnName
FROM TableName
In both Oracle and SQL Server, are these known as virtual columns or do they have different names between the 2 platforms? What are the differences between doing t his in either platform if any?
The article mentions:
You should keep in mind that:
virtual columns may not reference other virtual columns;
virtual columns only within the containing table. You cannot reference columns within other tables.
So that does that mean in a package in oracle where multiple stored procedures are created and ran, that one computed column value cannot be referenced from another stored procedure? I am interested in hearing about both platforms but my preference at this point in time leans more to the oracle side.
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