Machine Learning Plus

How to select first row in each ‘Group By’ group?

3 min

SQL

How to select first row in each ‘Group By’ group?

Problem You have a table with multiple rows of data for each group, and you want to select the first row from each group....

CookBook SQL

How to transpose columns to rows in SQL?

2 min

SQL

How to transpose columns to rows in SQL?

Problem How to transpose columns to rows in SQL? This essentially requires reshaping the table in such a way that certain columns of a...

CookBook SQL

How to select only rows with max value on a column?

2 min

SQL

How to select only rows with max value on a column?

Problem How to select only rows with max value on a column for each distinct value in another categorical column in MySQL? From Items...

CookBook SQL

SQL Window Function Exercises and Solutions – Set 2

13 min

SQL

SQL Window Function Exercises and Solutions – Set 2

SQL window functions exercises is designed to challenge your SQL muscle and help internalize data wrangling using window functions in SQL. The questions are...

Window Functions

How to select first row in each ‘Group By’ group?

How to transpose columns to rows in SQL?

How to select only rows with max value on a column?

SQL Window Function Exercises and Solutions – Set 2

Machine Learning A-Z™: Hands-On Python & R In Data Science

Free Sample Videos:

Day: September 13, 2023

How to select first row in each ‘Group By’ group?

How to transpose columns to rows in SQL?

How to select only rows with max value on a column?

SQL Window Function Exercises and Solutions – Set 2

Python.SQL. NumPy. All free.

Machine Learning A-Z™: Hands-On Python & R In Data Science

Free Sample Videos:

Machine Learning A-Z™: Hands-On Python & R In Data Science

Machine Learning A-Z™: Hands-On Python & R In Data Science

Machine Learning A-Z™: Hands-On Python & R In Data Science

Machine Learning A-Z™: Hands-On Python & R In Data Science

Machine Learning A-Z™: Hands-On Python & R In Data Science

Python.
SQL. NumPy.
All free.