Consider the following relational schemas, namely Employee, WorkOn, and Project. Employee (eid, ename, age, supv_eid) WorkOn...
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Consider the following relational schemas, namely Employee, WorkOn, and Project. Employee (eid, ename, age, supv_eid) WorkOn (eid, pid) Project (pid, pname, year) The key fields are bold. WorkOn.eid refers to Employee.eid, WorkOn.pid refers to Project.pid, and Employee.supv_eid refers to Employee.eid. Write a SQL statement to answer the following question. Retrieve the names of employees who have worked on both 'Database' and 'DataMining' projects. Consider the following relational schemas, namely Employee, WorkOn, and Project. Employee (eid, ename, age, supv_eid) WorkOn (eid, pid) Project (pid, pname, year) The key fields are bold. WorkOn.eid refers to Employee.eid, WorkOn.pid refers to Project.pid, and Employee.supv_eid refers to Employee.eid. Write a SQL statement to answer the following question. Retrieve the names of employees who have worked on both 'Database' and 'DataMining' projects.
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You can use a SQL statement with subqueries to retrieve the names of emplo... View the full answer
Related Book For
Database management systems
ISBN: 978-0072465631
3rd edition
Authors: Raghu Ramakrishan, Johannes Gehrke, Scott Selikoff
Posted Date:
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