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Natural Join - SQL
In the absence of NATURAL JOIN Example has to be replaced by something rather more longwinded, as shown in Example.
Example: Joining IS_CALLED and IS_ENROLLED_ON in original SQL
SELECT IC.StudentId, Name, CourseId
FROM IS_CALLED AS IC, IS_ENROLLED_ON AS IE
WHERE IC.StudentId = IE.StudentId
Explanation
Obtaining a natural join by specifying the common columns Synatax: SELECT * FROM IS_CALLED JOIN IS_ENROLLED_ON USING ( StudentId ) However, a named columns join doe
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Example of GROUPBY Operator Example: How many students sat each exam, using GROUP BY, NATURAL LEFT JOIN, and COALESCE SELECT CourseId, COALESCE (n, 0) AS n FROM COURS
At times, customers make mistakes in submitting their orders and call to cancel the order. Brewbean's wants to create a trigger that automatically updates the stock level of all pr
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