Answer:
The correct option is option 4 from the options indicated below:
Explanation:
The options are as given below
1-SELECT customer# FROM customers
UNION
SELECT customer# FROM orders;
2-SELECT customer# FROM orders
MINUS
SELECT customer# FROM customers;
3-SELECT customer# FROM orders
INTERSECT
SELECT customer# FROM customers;
4-SELECT customer# FROM customers
MINUS
SELECT customer# FROM orders;
Option 1 is not correct as it will provide the list of all the customers whether they have placed order or not.
Option 2 is not correct as it will provide the list of customers who have placed order but are not in the customers table. This will return the empty records.
Option 3 is not correct as it will provide the list of customers who have placed the order.
Option 4 is correct as it will provide the list of customers from the CUSTOMERS table which are not in the Orders table. thus the list of customers who have not placed the order yet.
Answer:
Used to lol not anymore tho :p
Answer:
Crisis-Mapping
Explanation:
Social networks are characterized by the immediacy of the content that users produce, and that same feature can be transferred to the online mapping of crises and conflicts.
Characteristics Crisis-Mapping:
- Real-time information processing.
- Immediacy;
- Visualization of the aggregated information can allow the detection of patterns that cause new analyzes to be undertaken or work hypothesis to verify.
- Continuity in the tasks, the maps record activity without interruption during the twenty-four hours of the day and seven days per week.
-
Flexibility in the protocols, since the tasks are distributed and evolve according to the dynamics (the crisis maps evolve with the crisis itself).
It is a programmer's responsibility to contribute to society and human well-being is true.
Explanation:
- It is a programmer's responsibility to contribute to society and human well-being is true.
- The Association for Computing Machinery (ACM) is known as the world's largest educational and scientific computing society.
- It has its own Code of Ethics and another set of ethical principles which were also approved by the IEEE as the known standards of teaching and practicing software engineering.
- Programmers contribute to develop computer systems which can reduce negative impression to the society.
- The negativity includes as threats to safety and health, which can be reduced and make everyday activities and work easier.
- software developers should reduce the risk of harming others due to the coding errors or the security issues which could impact human well-being.
