SQL – Questions and Answers SQL Questions and Answers has been designed with a special intention of helping students and professionals preparing for various Certification Exams and Job Interviews. This section provides a useful collection of sample Interview Questions and Multiple Choice Questions (MCQs) and their answers with appropriate explanations. Sr.No. Question/Answers Type 1 This […]
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SQL – Useful Functions SQL has many built-in functions for performing processing on string or numeric data. Following is the list of all useful SQL built-in functions − – The SQL COUNT aggregate function is used to count the number of rows in a database table. – The SQL AVG aggregate function selects the average […]
SQL – Datatype Functions The Data Type functions in SQL are a scalar functions that returns information about various data type values. Following are the SQL date type functions − Sr.No. Function & Description 1 Returns the number of bytes used to represent any expression and also counts the leading and trailing spaces of the […]