Coding Musings

Trying to share some code ideas


Fractional Knapsack

Standard problem of trying to maximize the values of item with a constraint.  How many items can you put in a knapsack given the value and the weight of the items.

Uses python3
goal: maximize the value of items selected from the get_optimal_value
while the items selected combined weight is less than the inputted capacity

Binary Search

Binary Search Problem

Function below handles a simple search for a needle in a haystack using the binary search algorithm.

The function is called recursively to check if a value is inside the array

See python code below.

Datatype Cast in T-SQL

“Making a square peg fit into a round hole”

There are many times when dealing with data that you need to transfigure one data set to allow for comparison purposes.

SQL has built in functions that easily allow us to transfigure data. There are some considerations when using the functions, most importantly understanding what will happen to the data set during the process.

Today I will talk about the CAST function.

Pairwise Product

Function to take a vector of length n and multiply the two largest values in the vector.

See the code below

SQL Update Many Rows

When working with a large table the UPDATE statement can easily bring even the most robust server to a screeching halt. In this posting I will show an alternative so even the largest tables can be updated without negatively impacting server performance.

Updating a million rows

Microsoft Access and ANSI

“What you don’t know can’t hurt you can drive you bonkers.” – R. Hedgins

Today’s posting will deal with an option setting that can minimize interoperability issues between Microsoft’s nuanced interpretations of standards.

Microsoft Access and Microsoft SQL

SQL Union – New Ideas

“Union of ideas begets a surprising confidence” – J. Madison

Today’s post will deal with an SQL command many of us may be familiar with but may forget exists, or haven’t thought about other uses for it.


In simplest terms the UNION command allows you to join separate SQL queries into one result set. The UNION command has one optional option “ALL”

Views, we need all the Views

There are times when you want to find all of the views that are in your Microsoft SQL database.  Especially when there are 1,000’s of views.  Each with the naming convention of the previous 5 DBA’s personal whims.  Normally as a database ages the views will become duplicative and add to the general clutter that gets in the way of efficiency.

List all views in a database

Effective use of Collate

“Talk about reaching over your shoulder to scratch the back of your knee” — Dave M.

My former co-worker Dave was full of such colorful phrases, and this was one of his favorites. He would use the phrase anytime he saw someone using an inefficient method to accomplish a task.

In this vein, I am going to attempt to share some tips, tricks, and helpful hints about how to accomplish things quicker and easier. Some of you out there may be already aware of these tips, but others may not. Also, if you have some hints to share send them along, so everyone can benefit.

How to Collate

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