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SQL Interview Preparation

Answer: Filter with the WHERE Clause

Explore how to filter SQL records effectively using the WHERE clause. Understand using conditions with equality, relational, and logical operators. Learn alternate filtering with LIKE and implementing session variables for dynamic input. Practice applying these concepts to solve common interview queries and challenges.

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Solution

The solution is given below:

MySQL
/* The query to find the student records for st-104 */
SELECT * FROM StudentGrades 
WHERE  StudentID = 'st-104';

Explanation

The explanation of the solution code is given below:

  • Line 2: The SELECT query selects all the columns using the * wildcard. The FROM clause specifies the table name as Students.

  • Line 3: The WHERE clause specifies the condition on which we want to retrieve the data from the table. ...