tips_learn_sql.pdf
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20 Tips to learn SQL as a Data professional!
SQL is a programming language used to communicate with databases.
It allows you to create, modify, and retrieve data from a database, making it an essential tool for anyone working with data.
SQL is a programming language used to communicate with databases.
It allows you to create, modify, and retrieve data from a database, making it an essential tool for anyone working with data.
You Don’t Need Redux — 3 Simple Alternatives for State Management in React
#redux #recoil #zustand #react
https://bit.ly/3CGqJLe
#redux #recoil #zustand #react
https://bit.ly/3CGqJLe
Telegraph
You Don’t Need Redux — 3 Simple Alternatives for State Management in React
If you’re writing a React app, you’ll need some strategy to manage state — how you store and modify the app’s data. Almost React developer I ask uses Redux for state management, and almost every one I ask has some issues with it. The good news is that there…
What’s the difference between Inner, Left, Right and Full join?
The diagram below illustrates how different types of joins work.
(INNER) JOIN: returns only matching rows between both tables.
LEFT (OUTER) JOIN: returns all matching rows, and non-matching rows from the left table.
RIGHT (OUTER) JOIN: returns all the matching rows, and non-matching rows from the right table.
FULL (OUTER) JOIN: returns all the rows from both left and right tables, including non-matching rows.
The diagram below illustrates how different types of joins work.
(INNER) JOIN: returns only matching rows between both tables.
LEFT (OUTER) JOIN: returns all matching rows, and non-matching rows from the left table.
RIGHT (OUTER) JOIN: returns all the matching rows, and non-matching rows from the right table.
FULL (OUTER) JOIN: returns all the rows from both left and right tables, including non-matching rows.
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Amazing visual explanation: pass by reference Vs pass by value
Think of the coffee in the cup as the #data in a variable. One is a copy and the other one is the original.
gif credit: penjee
https://media.licdn.com/dms/image/C4D22AQHrjx3qDNn_Cg/feedshare-shrink_800/0/1672665015273?e=1676505600&v=beta&t=PyVnoRhAbmSgbhX2YDSwDx3N_dh5icvwSsVQz25iyCE
Think of the coffee in the cup as the #data in a variable. One is a copy and the other one is the original.
gif credit: penjee
https://media.licdn.com/dms/image/C4D22AQHrjx3qDNn_Cg/feedshare-shrink_800/0/1672665015273?e=1676505600&v=beta&t=PyVnoRhAbmSgbhX2YDSwDx3N_dh5icvwSsVQz25iyCE
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