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Assuming that all the tables have been created as given in the relational schema, write SQL code to make the following changes in the structure of the tables:
(i) Make the employee_id the Primary Key of the EMPLOYEES table
(ii) Make the department_id and the manager_id the foreign key of the Employee table assuming that the department_id has been declared as the primary key of the DEPARTMENTS.
(iii) Add a check constraint in the Job_History table so that the end_date will always be greater than the start_date.
(iv) Add a unique constraint in the Employee table so that each employee will have a unique email address.
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What are the advantages of horizontal partitioning? i. Software is must be easy to check. ii. Software is handy to maintain. iii. Create fewer side effects. iv. Softwa
Explain the term in brief- Test Script and Test Specification: Test Script: - It is generally used to refer to instructions for a particular test which will be carried out
A software tool that accepts as input source code, specifications, test criteria, or data structure definitions; uses these inputs to make test input data; and, sometimes, verifies
Q. Define graph matrix and connection matrix. Ans: Graph matrix: A graph matrix is a square matrix whose size that is a number of rows and columns is equal to the number of n
Level 4 (Managed) Organisation satisfies all the requirements of level-3. At this level quantitative standards are set for software processes andproducts. Project analysis is
Hard drive has space, but it keeps telling me that its full and asks me to delete files. I checked. There is nearly full C drives (8GB) but when i am open c drive and check than ne
Structured Analysis Model Structured analysis is the most broadly used of requirements modeling techniques relies on flow modeling and data modeling to established t
What are the types of metrics? Direct metrics - It refers to immediately measurable attributes. Example -Execution speed, Lines of code. Indirect metrics - It refers to the
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