1. Java Basics 1.1 What are the data types in Java? Primitive types: byte (1), char (2), short (2), int (4), long (8), double (8), float (4), boolean (1) Reference types: classes, interfaces, enums, arrays 1.2 Differences between object-oriented and procedural programming? Both are development parad...
Multi-table queries, also known as join queries, retrieve data from two or more related tables simultaneously. This requires the tables to be logically connected through common fields, such as a shared department ID, which may or may not be a formal foreign key. Understanding Cartesian Product Issue...
Bulk Data Insert Optimization Three key strategies for efficient bulk loading: Data Ordering: Since InnoDB tables store data in primary key order, sorting import data by primary key sequence significantly improves load performance. Disable Unique Validation: Turn off constraint checking for unique c...
System Preparation Execute the following on a CentOS 7 host. First eliminate conflicts with the distribution’s default database packages: yum -y remove mariadb* Install the supporting libraries and build utilities required by the generic Linux binary: yum -y install autoconf bison ncurses-devel liba...
Database and Table Operations Basic database creation and table management examples: -- Create database with UTF8 charset CREATE DATABASE IF NOT EXISTS school_db DEFAULT CHARACTER SET utf8mb4; USE school_db; -- Create student profile table CREATE TABLE IF NOT EXISTS student_profiles ( student_id SMA...
The system offers a complete solution for managing matchmaking-related activities, including wedding company listings, booking and favoriting, marriage case studies with bookmarking, user profiles, matchmaking interactions such as messages and favorites, and administrative tools. It is implemented w...
MySQL Functions Creating Database and Department Table USE UNIVERSITY_DB; CREATE TABLE departments( dept_name VARCHAR(20), budget BIGINT(20), building VARCHAR(20) ); INSERT INTO departments VALUES('Electrical Engineering',15000,'Building A'); INSERT INTO departments VALUES('Telecommunications',45000...
MySQL Built-in Stress Testing with mysqlslap MySQL ships with a native benchmarking utility called mysqlslap that simluates client load without requiring additional installation. Basic Usage mysqlslap --auto-generate-sql \ --concurrency=100,200 \ --iterations=5 \ --number-char-cols=30 \ --number-int...
The Critical Role of Indexes Proper indexing directly impacts MySQL database performance. Without appropriate indexes, even moderate-sized tables become vulnerable to full table scans that can cause response times to spike dramatically under concurrent load. In severe cases, this leads to database p...
System Overview Modern society advances rapidly, and computer applications for data management have become quite sophisticated. With the rise of mobile internet, information processing no longer depends on geographical constraints, offering timely and efficient solutions that are widely appreciated....
