Display names of all those students who have “A”
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
Consider Following Tables.
Student ( regNo, sName, sCity, sCGPA, sAge) Course ( cCode, cName, credit_hours) Enrollment (regNo, cCode, semester, Grade)
Write SQL queries for the following statements.
NOTE: you must use “JOINS” query only.
- Display names of all those students who have “A”
- Display student name and ccode of all those students who have ‘F’ grade in 5th
- Display data of all those students who have enrolled at least 10
- Display grade of ‘Ali’ in course ‘CS101’.
- Display all courses of ‘Amir’ along with grade, also display names of courses which are not yet enrolled by ‘Amir’.
- Display course names along with number of enrolled student in it. If no one has yet enrolled that particular course, it must display ‘0’ in number of enrollment
- Display list of courses which are taught in 7th (course name must not repeat)
- Display list of all students by name and course name they have
- Display names of students and names of courses they have enrolled. Also display student’s name that have not enrolled any course
- Display all those students who have not enrolled any course
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