Open Source

Resources to Learn Programming #3

Francisco Olvera

Database Administration Fundamentals (WS17SQL1007) – Day 10

Francisco Olvera

We have finished our five-week adventure into the land of SQL (WS17SQL1007). Thank you for joining us.

By the way, try to figure out what the following prints. You might not need to go to http: //ascii.cl/.

DECLARE @yourNAME VARCHAR(50),
        @yourCRSE VARCHAR(11);

SET @yourNAME = '#space_holder_for_your_name#';
                                -- your name in this param
SET @yourCRSE = 'WS17SQL1007';  -- this class ending today

PRINT   CHAR(84) +CHAR(104)+CHAR(97) +CHAR(110)+CHAR(107)+
        CHAR(32) +CHAR(121)+CHAR(111)+CHAR(117)+CHAR(44) +
        CHAR(32) +@yourNAME+CHAR(44) +CHAR(32) +CHAR(102)+
        CHAR(111)+CHAR(114)+CHAR(32) +CHAR(116)+CHAR(97) +
        CHAR(107)+CHAR(105)+CHAR(110)+CHAR(103)+CHAR(32) +
        CHAR(99) +CHAR(108)+CHAR(97) +CHAR(115)+CHAR(115)+
        CHAR(32) +@yourCRSE+CHAR(46) +CHAR(13) +CHAR(83) +
        CHAR(101)+CHAR(101)+CHAR(32) +CHAR(121)+CHAR(111)+
        CHAR(117)+CHAR(32) +CHAR(105)+CHAR(110)+CHAR(32) +
        CHAR(116)+CHAR(104)+CHAR(101)+CHAR(32) +CHAR(105)+
        CHAR(110)+CHAR(116)+CHAR(101)+CHAR(114)+CHAR(109)+
        CHAR(101)+CHAR(100)+CHAR(105)+CHAR(97) +CHAR(116)+
        CHAR(101)+CHAR(32) +CHAR(99) +CHAR(108)+CHAR(97) +
        CHAR(115)+CHAR(115)+CHAR(46) +CHAR(13) +CHAR(13) +
        CHAR(70) +CHAR(46) +CHAR(79) +CHAR(108)+CHAR(118)+
        CHAR(101)+CHAR(114)+CHAR(97) +CHAR(13) +CHAR(102)+
        CHAR(111)+CHAR(108)+CHAR(118)+CHAR(101)+CHAR(114)+
        CHAR(97) +CHAR(64) +CHAR(98) +CHAR(109)+CHAR(99) +
        CHAR(99) +CHAR(46) +CHAR(99) +CHAR(117)+CHAR(110)+
        CHAR(121)+CHAR(46) +CHAR(101)+CHAR(100)+CHAR(117)+
        CHAR(13) +CHAR(104)+CHAR(116)+CHAR(116)+CHAR(112)+
        CHAR(58) +CHAR(47) +CHAR(47) +CHAR(102)+CHAR(111)+
        CHAR(108)+CHAR(118)+CHAR(101)+CHAR(114)+CHAR(97) +
        CHAR(46) +CHAR(99) +CHAR(111)+CHAR(109)+CHAR(109)+
        CHAR(111)+CHAR(110)+CHAR(115)+CHAR(46) +CHAR(103)+
        CHAR(99) +CHAR(46) +CHAR(99) +CHAR(117)+CHAR(110)+
        CHAR(121)+CHAR(46) +CHAR(101)+CHAR(100)+CHAR(117)+
        CHAR(47) ;          -- calling characters in ASCII

Download the class notes for day 10.

Using Git to Manage Changes in Code Without Trashing It

Francisco Olvera

Version control is a good idea in order to keep track of changes in your code — especially when working with multiple files in multiple directories.

“Git is a free and open source distributed code management and version control system that is distributed under the GNU General Public License version 2. In addition to software version control, Git is used for other applications including configuration management and content management.”
http://searchitoperations.techtarget.com/definition/Git

One of the best used version control systems is Git created by Linus Torvalds who created Linux.

You can install Git in various operating systems including non-Unix systems like Windows (Git Bash).

First we have to introduce yourself to Git.

  1. Initialize Git. 
    git init
  2. Then introduce yourself to Git. This is the way you can commit transactions. 
    git config --global user.name "[your_name]"
git config --global user.email "[your_email]"
  3. You can use helpful colorization of commands in Git. 
    git config --global color.ui auto
  4. Of course, we can edit our configuration file (.gitconfig). Note that files starting with a period ('.') are hidden. 
    [editor] .gitconfig
  5. At this point, you can tell Git what files it has to watch. 
    git add [directories/files]
  6. Of course, if you prefer to add all the files in a sub-directory, you can add of it. 
    git add .
  7. To make sure that Git is running, you can ask for its status. 
    git status

Once Git is running and collecting changes, we can manipulate the changes.

  1. We can ask Git what changes have been done in our code. 
    git diff
  2. We can also ask what changes have been made in each file. 
    git diff --staged
  3. Once we accept the changes, we can COMMIT them. 
    git commit -m "[message/memorandum]"
  4. We can group these changes before committing creating branches — alternate copies of the project in order not to destroy the original code. 
    git branch [branch_name]
  5. Once changes are approved in the branch, we can merge the changes into the new BRANCH. 
    git merge
  6. We can then upload the new branch into the original. 
    git push

For more information, get the GitHub Git Cheat Sheet (local copy, owned by GitHub) or go to try.github.io.

I would like to thank Julia López (@yukideluxe) from Spain and Kimberley Cook (@KimberleyCook91) from England for helping me put this quick tutorial together.

Top (Best) Programming Languages to Learn in 2017

Francisco Olvera

According to IBM developerWorks, the top languages are the following.

Institute of Electrical and Electronics Engineers has its own list.

Every site has different list, but IBM developerWorks and Institute of Electrical and Electronics Engineers are respectable sources.

Database Administration Fundamentals (WS17SQL1007) – Day 6

Francisco Olvera

I have emailed all students a one-time invitation to my Slack channel (https://sqlhq.slack.com/) where you can post any question/comment and get answers/response by your fellow students.

Last night we worked on a long lab covering all material that we have covered so far. Next week we will start to CREATE data objects, INSERT data into tables and DROP data objects.

Download the class notes for day 6.

Database Administration Fundamentals (WS17SQL1007) – Day 5

Francisco Olvera

We are half-way done (fifth class of ten). We will stop covering new material in order to review all the material we have covered so far. You need to understand and know the syntax well as this is the foundation of SQL. We will then continue and cover how to CREATE and ALTER database objects.

Download the class notes for day 5.