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Explain entity integrity and referential integrity rules in relational model.show how these aer realized in sql
When the database is set up it should be populated with the data that you have chosen. Display this data as part of your documentation. Each table should have from 3 to 6 records initially.
How does the order of joins in an SQL statement affect the performance of the join and what can the DBA do to determine the preferred order of joins for an SQL statement that includes the join of at least three tables?
Display the vendor ID and vendor name of the items whose item quantity is the largest and display the item ID and item quantity of all items whoseitem quantity is less than the average quantity. Also display the average quantity
Pretend that you are on the boards of the American National Standards Institute (ANSI) and the International Organization for Standards (ISO), two of the organizations who standardized SQL
Create a trigger named Products_INSERT that inserts the current date for the DateAdded column of the Products table if the value for that column is null. Test this trigger with an appropriate INSERT statement.
Draw an Entity-Relationship Diagram (ERD) for the data storage requirements of a business described in the case study and Data Model Transformation.
Write the following queries in SQL: If an employee works on every project located in Houston, then list the employees social security number and name.
Write the CREATE INDEX statements to create a clustered index on the GroupID column and a nonclustered index on the IndividuallD column of the GroupMembership table.
Give me a list of all the proposed prices for the next year from the l_foods table. Sort your results by proposed_price. (Note that proposed price, is price + price_increase.)
To represent a problem description given in natural language as an (Enhanced) Entity -Relationship model; to convert the ER/EER model into a relational data model;
The table name will be METALS and will be used to store description of various metals. Following offers some additional direction on how table must be created.
Produce a diagram showing schema and the partial and transitive dependencies in your 1NF. b. Produce a diagram showing table schema and any transitive dependencies in your 2NF
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