Question
Read the given statements and conclusions carefully.
Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: All Sofa are Flower. No Flower is Wall. Some Wall are Pot. Conclusions: I. Some Sofa are Pot. II. No Flower is Pot III. No Sofa is Wall.Solution
All Sofa are Flower (A) + No Flower is Wall (E) → No Sofa is Wall (E) + Some Wall are Pot (I) → Some Pot are not Sofa (O*). Hence conclusion I does not follow but conclusion III follows. No Flower is Wall (E) + Some Wall are Pot (I) → Some Pot are not Flower (O*). Hence conclusion II does not follow.
A star schema in a data warehouse consists of:
A snowflake schema differs from a star schema mainly because:
Which of the following is used to maintain information about the structure of a data warehouse?
In a data warehouse, which type of table stores quantitative data for analysis?
What is the result of SELECT COALESCE(NULL, NULL, 5, 10);?
Which OLAP operation involves focusing on a subset of dimensions (e.g., region=‘Asia’)?
Which SQL query will correctly calculate the average salary of employees in each department and group them by department in a table named 'employees'?
Which SQL function returns the total number of rows in a table?
Which SQL keyword is used to combine results from two queries and remove duplicates?
What is a data mart?
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