SQL Properties: • SQL is a declarative language: it states what we want, not how to get it • SQL is functional: it builds results by applying functions to inputs • SQL treats data as sets, enabling powerful set-based operations
Three Constraints in Relational Databases:
Summary
🚐Summary
Summary
Introduction of database history • Description of Big Data with the three Vs—Volume, Variety, Velocity • Challenges with capacity, throughput, and latency • Solutions like parallelization and batch processing
Relational Database Management Systems (RDBMS) • Structured data storage using tables with rows and columns • ACID properties (Atomicity, Consistency, Isolation, Durability) ensure data integrity • SQL (Structured Query Language) for data manipulation and querying • Normalization techniques to reduce data redundancy • Support for complex relationships between data entities through foreign keys • Examples include MySQL, PostgreSQL, Oracle, and SQL Server
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SQL Properties: • SQL is a declarative language: it states what we want, not how to get it • SQL is functional: it builds results by applying functions to inputs • SQL treats data as sets, enabling powerful set-based operations
Three Constraints in Relational Databases: