Relational Model Introduction - E-Courses
Relational Model Introduction - E-Courses
Relational Model Introduction - E-Courses
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Example Queries<br />
Retrieve the list of female PhD students<br />
σ degree = ‘phD’ ^ sex = ‘F’ (student)<br />
Obtain the name and rollNo of all female Btech students<br />
π rollNo, name (σ degree = ‘BTech’ ^ sex = ‘F’ (student))<br />
Obtain the rollNo of students who never obtained an ‘E’ grade<br />
π rollNo (student) – π rollNo (σ grade = ‘E’ (enrollment))<br />
Prof P Sreenivasa Kumar<br />
Department of CS&E, IITM<br />
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