CST 363 Week 4

WELCOME TO WEEK 4

Learning Journal: 

    I can't believe we are halfway through the course! I have really enjoyed this course and all the material I have learned so far. One thing I have learned so far is that for large complex databases we need to complete 3 phases: 

  1. Analysis - Specification of database requirements without regard to implementation.
  2. Logical Design - Implements of database requirements as tables, keys, and column in a specific database system.
  3. Physical Design - Addition of indexes and specification of how tables are organized on storage media.

    I also learned how join queries work. The select statement combines two tables (left and right tables) into a single result using the = operator. However, these columns must have comparable data types. There are many types of join queries such as: 

  • Inner Join: Selects only matching left and right table rows.
  • Full Join: Selects all left and right tables rows regardless of matching.
  • Left Join: Selects all left table rows but only matching right table rows.
  • Right Join: Selects all right table rows but only matching left rows.
  • Outer Join: Any join that selects unmatched rows, including left, right, and full joins. 

    Something I found really interesting and initially hard to grasp was subqueries. It took me a while to learn the syntax. Even now, sometimes I have to look back at my notes, but I understand how it works. 

Creating views is another thing I have learned so far. These tables are very helpful when there needs to be data restriction. However, it is important to know that inserting, updating, and deleting data through views should be avoided. 

    Lastly, learning about Cardinality, which refers to the maxima and minima of relationships and attributes. When the relationship maximum (greatest number of instances of one entity that can relate to a single instance of another entity) is one, it is called singular, and when it is many, it is called plural. On the other hand, when the relationship minimum (least number of instances of one entity that can relate to a single instance of another entity) is zero, it is called optional, and when it is one, it is called required. 

    A question I have is when should one consider using NoSQL databases like MongoDB instead of traditional relational databases. What are the pros and cons for each approach? Another question I have is when would one choose to denormalize a database, and what are the benefits or potential drawbacks? One last question I have is how do you know which type of index to use and when they should be used? 

Comments

Post a Comment

Popular posts from this blog

CST 300 Week 4

Image
  WELCOME TO WEEK 4 Educational & Career Goals This I learned that it is essential to use these 7 Career Goals in order to succeed:  Self-Assessment Networking Tracking Accomplishments Know Your Worth  Update Your Skills Negotiate Allow for Downtime https://cdn.shortpixel.ai/spai/w_1052+q_lossy+ret_img+to_webp/tipsforlawyers.com/wp-content/uploads/2021/01/Goal-setting-2048x1152.jpg      Tracking accomplishments is one goal that I want to apply to my career. It will help me in the future when I begin applying for jobs. Having everything documented will save me from trying to remember things and possibly leaving things out. This goal will also help me create my portfolio. Another career goal that I want to apply is to update my skills and begin networking. For instance, updating my skills by learning new programming languages, will be beneficial when being considered for interviews. Networking will also be beneficial, as job recruitment has changed from what it used to in the past. 
Read more

CST 300 Week 3

Image
       WELCOME TO WEEK 3 Work Styles & Conflict Styles      This week, I learned about the different work styles there are and conflict styles in action.  Each work style, whether it's about getting it right, getting it done, getting along, or getting appreciation, seeks something distinct. For instance, Get it Right wants the facts, to focus on details, and values being right. Get it Done on the other hand, focuses on deadlines and is not afraid of mistakes. They also focus on tasks being done and speeding up. Get Along is people oriented, they are aware of the needs of others, are social, direct, and want everyone satisfied. Last but not least is Get Appreciation. They tend to like to contribute, give positive feedback, and they like assertiveness.      I also learned about the different conflict styles, which are: Avoiding Forcing Accommodating Compromising Collaborating. https://www.red-thread.com/wp-content/uploads/sites/779/2016/08/Blog_Header_work-style.jpg?w=1770&h=
Read more

CST 300 Week 1

Image
WELCOME TO WEEK 1           Week 1 out 100 has begun! Im thrilled to share my journey while completing the CS Online program at California State University Monterey Bay. I can't wait to see what the next two years will bring.  https://www.prepbaseballreport.com/upload/school_logos/thumbs/334_thumb.png      This week I read a little bit of the history of CSUMB. It used to be an Army Base, Fort Ord, from the 50's to the 70's. Well known celebrities such as Clint Eastwood and Jimi Hendrix received training at Fort Ord.       I learned a few tips in order to succeed in online learning. The one that stood out the most was the importance of creating an organized schedule and planning study sessions. The online learning environment can make it easy for students to procrastinate. Therefore, engaging with others and logging into canvas at least three times a week should be helpful to maintain focus. Looking forward to next week!   
Read more