Oracle – Easy Date Strings (and NOT)

Whenever I type in a date strings in Oracle, I convert the strings to Date data type in my code as well as my queries without relying on the session setting for date format. I will explain why. Session date format setting: Session date format settings govern how date strings should be converted into dates (the … Continue reading Oracle – Easy Date Strings (and NOT)

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Hard-coding Values In SQL Code – Please Don’t

What is hard-coding? Wikipedia defines it as below Hard coding (also, hard-coding or hardcoding) refers to the software development practice of embedding what may, perhaps only in retrospect, be regarded as input or configuration data directly into the source code of a program or other executable object, or fixed formatting of the data, instead of … Continue reading Hard-coding Values In SQL Code – Please Don’t

Oracle – Calculating Business Days Between Two Dates (With Holiday Exclusion)

If you search the web on how to calculate the number of business days between two dates in Oracle, you would see so many results. Here is one more with some explanation to go with it. There is no magic to it. It is simple and straight-forward and this is as basic as it can … Continue reading Oracle – Calculating Business Days Between Two Dates (With Holiday Exclusion)

Oracle – Recycle Bin Basics

Basics of Oracle recycle bin - A simple post to illustrate the power of recycle bin and how to retrieve objects back from it.

Oracle – Facts About Primary Key vs. Unique Key You May Not Have Known

In this post we talk about Oracle specifically although some concepts apply to other databases. At a high level - PK's vs UK's Ask someone who has been doing database work about Primary Keys (PK) and Unique Keys (UK) and the differences between the two, they will tell you everything they know. Some even go into … Continue reading Oracle – Facts About Primary Key vs. Unique Key You May Not Have Known