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 […]
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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 […]
SQL – Quick Guide SQL – Overview SQL is a language to operate databases; it includes database creation, deletion, fetching rows, modifying rows, etc. SQL is an ANSI (American National Standards Institute) standard language, but there are many different versions of the SQL language. What is SQL? SQL is Structured Query Language, which is a […]