Database

This document is a complete set of advanced-level notes on Database Management Systems (DBMS) focusing on SQL operations and Normalization. It is designed for Computer Science and IT students preparing for university exams, competitive tests, or technical job interviews. The content is written in a clear, beginner-friendly language and includes practical explanations of key topics such as: SQL Clauses: WHERE, GROUP BY, HAVING Aggregate Functions: COUNT, SUM, AVG, MAX, MIN JOINs: INNE...

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. Which of the following functions will truncate a numeric value to a specific position? 1. TRUND 2. TRUNCATE 3. TRUNC 4. none of the above 2. Which of the following represents the number of days that have passed since January 1, 4712 B.C.? 1. Cartesian date 2. Julian date 3. Extended date 4. none of the above 3. Which of the following functions can be used to change the format of a date that has been entered by a user to the default storage format use by Oracle12c? 1. TO_DATE ...

MySQL is an open-source relational database management system (RDBMS). Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My and "SQL", the abbreviation for Structured Query Language. A relational database organizes data into one or more data tables in which data may be related to each other; these relations help structure the data. SQL is a language programmers use to create, modify and extract data from the relational database, as well as control user a...