Question
Read the given statements and conclusions carefully and
decide which of the conclusions logically follow(s) from the statements. Statements: Regularity is a cause for a success in exams. Some irregular students pass in the examinations. Conclusions: I. All irregular students pass in exams. II. Some irregular students fail in the exam.Solution
Conclusions: I. All irregular students pass in exams. → The conclusion does not follows. (As Some irregular students pass in the examinations) II. Some irregular students fail in the exam. → The conclusion does follows. (As Some irregular students pass in the examinations → Some irregular students fail in the exam) Hence, only conclusion (II) follows.
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?