====== LU03.S02 - Answers: CRUD and SQL ======

1. Explain what is behind the so-called CRUD operations and add an example.
  * <color #ed1c24>CRUD is an acronym for Create, Read, Update, and Delete and represents the four fundamental operations for managing data in a database.</color> 
  * <color #ed1c24>CRUD is a conceptual framework.</color>
  * <color #ed1c24>It outlines the basic operations for data management but doesn't specify how these operations are implemented. </color>

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2. What does the acronym SQL stand for?
  - <color #ed1c24>Structured Query Language</color>
  - Standard Query Language. It used to be that name bevor 2000, but changed in "Structured"
  - Simple Quarrel Language. 

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3. Which of the following statements about CRUD and SQL is **not** correct?
  - The CRUD approach is a prerequisite for all types of dynamic web applications.
  - CRUD is realised in databases by SQL -statements, e.g. SELECT, CREATE, UPDATE and DELETE.
  - The CRUD approach groups SQL-operations logically.
  - <color #ed1c24>CRUD is an alternative to SQL and has to be applied, if we want to build stable web pages.</color>

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4. Which of the following SQL subtypes does **not** exist? Explain the meaning of the other terms.
  - DCL = <color #ed1c24>Data Control Language. Management of users and their permissions.</color> 
  - DML = <color #ed1c24>Data Manipulation Language. Management of the content. Insert, Update, Delete. </color> 
  - <color #ed1c24>DXL</color>
  - DDL = <color #ed1c24>Data Definition Language. Manamegement of the tables and their structure.</color> 
  - DQL = <color #ed1c24>Data Query Language. Structured reading and fetching of content.</color> 

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===== Vocabulary =====
^ English ^ German ^ 
| conceptual | abstrakt, konzeptionell |
| to outline | skizzieren, zusammenfassen |
| to implement | anwenden |
| query | Anfrage |
| quarrel | Streit, Zank |


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