Casie Bao

All the lights we cannot see

2021-03-09 •

Git

git diff

compare the file from two different branches: git diff <branch a name> <branch b name> <file path>: in terminal, the file shows up with differences, the marker “^M” means “carriage return”. comparison is based on branch a, and shows how branch b differs from branch a. with red marks deletion of lines in branch a in the current branch b, and green marks new insertion.

Sql

<!doctype html>SELECTSELECT column1, column2, ... FROM table_name;SELECT * FROM table_name;SELECT DISTINCTstatement is used to return only distinct (different) values.SELECT DISTINCT column1,...…

2021-03-20 • Read More

Eariler Articles

System Engineering

System Engineering IntroductionWhat is system engineering design, test, and evaluation to meet cost, schedule and techinical performance understand customers needs (risk management etc) ...…

2021-02-02 • Read More