2 min
SQL
How to escape a single quote in SQL Server?
Problem How to escape a single quote in SQL Server, with a solution that is also reproducible in MySQL? For example, let’s try to...
Day: September 19, 2023
2 min
7 min
Statistics
Sampling and Sampling Distributions – A Comprehensive Guide on Sampling and Sampling Distributions
Explore the fundamentals of sampling and sampling distributions in statistics. Dive deep into various sampling methods, from simple random to stratified, and uncover the...
5 min
Statistics
Law of Large Numbers – A Deep Dive into the World of Statistics
The Law of Large Numbers (LLN) is a fundamental theorem in probability and statistics, serving as the basis for many concepts and practices in...
4 min
SQL
What is the difference between INNER JOIN, OUTER JOIN and FULL OUTER JOIN?
Problem What is the difference between INNER JOIN, OUTER JOIN and FULL OUTER JOIN? Input Let’s create three example tables, employees, departments, and projects,...
3 min
SQL
How to select a random row using SQL?
Problem How to select a random row using SQL? Input employee_id first_name last_name salary 1 John Doe 50000 2 Jane Smith 60000 3 Michael...
2 min
SQL
How to randomly select rows from a large table in MySQL super fast?
Problem How to randomly select rows quickly from a large table in MySQL? Input employee_id first_name last_name department salary 1 John Doe HR 50000.00...
2 min
SQL
How to efficiently convert rows to columns in SQL?
Problem Given a table, how to efficiently convert rows to columns? So that, the records in a given row become column names and the...
