Creating a full‑text search system inside a database involves setting up a lightweight inverted index using metadata tables, word lookup tables, and row mapping structures. The core idea is to tokenize text, map tokens to indexed rows, and query the result through prebuilt relationships without rely...
Transaction Management Strategies Spring framework provides two primary strategies for managing transactional boundaries within an application: programmatic and declarative management. Programmatic management offers fine-grained control by allowing developers to explicitly demarcate transaction boun...
Hibernate Core Architecture Hibernate's architecture consists of several interconnected components that work together to handle database operations: Configuration: Loads Hibernate configuration files and settings ServiceRegistry: Manages service registrations in Hibernate 4.x and later versions Sess...
Table Definition Syntax CREATE TABLE table_name ( column1 data_type constraint, column2 data_type constraint ); Column Naming Convensions Avoid using numeric-only identifiers. Special characters are prohibited. Recommended practice: Use descriptive, snake_case names like employee_id or department_na...
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...
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...
Core Concepts JDBC (Java Database Connectivity) is a standardized Java API for interacting with relational databases. Database vendors provide JDBC-compliant drivers—typically distributed as JAR files—that implement this interface. To connect to a specific database, the corresponding driver must be...
Global LockingGlobal locks restrict the entire database instance to a read-only state, preventing any data modification operations (insert, update, or delete) while the lock is active. This is often used for maintenance tasks or consistent backups.-- Acquire a global read lock FLUSH TABLES WITH READ...
Conditional Query Execution Execute queries only when parameter are not empty: SELECT * FROM t_interlinkage WHERE IF('翁二翁' != '', name LIKE '%翁二翁%', 1=1); Enhanced fuzzy search with concatenation: SELECT * FROM t_interlinkage WHERE IF('翁二翁' != '', name LIKE CONCAT('%', '翁二翁', '%'), 1=1); Comma-Separ...