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You are required to implement integrity constraints within the database to enforce the following requirements: For Projects:
Start date must be supplied.Start date cannot be in the past. Finish date must be on or later than the start date.Must have a supervisor value (supervised by cannot be null).For ActivitiesLocation must be supplied. Finish time can be no later than 11.00pm.Number of volunteers required must be greater than zero.Date cannot be in the past.Information requests
Create queries to answer the following information requests. Note: Do not use the Access query builder (QBE) to create your queries - you should type the queries in manually using SQL view.
1. List details (type, name) of all assets with a type of "Skill". Sort the list in alphabetical order of asset name.2. List all details of projects that have been finished in the last ten days.Hint: Use DateDiff function.3. List the name and contact details of any members who have not yet volunteered for an activity. Note: It is not possible to answer this query with an inner join.4. List the name of each member who may be able to contribute a trailer to a project.5. How many members are able to provide cooking skills? Your result should be a single column with the heading ‘Number of Cooks'. 6. For each project, show the project name and the total number of volunteers required for all activities associated with that project.
What are the reasons of bucket overflow? Explain any two methods for solving this problem. Ans: It is general for file structures to be divided into equal-length partitions, k
Describe the GRANT function and explain, how it associates to security. What kind of privileges may be granted? How are they revoked? Ans: Since more than one user can aacce
Why are cursors necessary in embedded SQL? A cursor is an object used to store the output of a query for row-by-row processing through the application programs. SQL statements
The data of a view is not physically stored, but derived from one or more tables. True the data of a view is not physically stored
Which database level is closest to the users? External database level is closest to the users.
Question : (a) Explain with the help of appropriate examples the difference between ‘Data' and ‘Information'. (b) A digital image is an array of pixels, where each pixel h
database help
Your friend owns and operates a wholesale shoe business with annual revenues of $5 million dollars. His wholesale business specializes in supplying and supporting retailers with sh
Write a short note on QBE? Stands for "Query By Example." QBE is a feature involved along with various database applications which gives user-friendly techniques of running da
" Wound-wait" scheme : It is based on a preemptive method. It is based on a simple rule: If Ti requests a database resource that is held by Tj
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