In the video I am uploading, you will find content related to a database (SQL) course exam. Please keep in mind that while the question patterns in the exam may change, the core concepts will remain the same. Therefore, it is crucial to understand the concepts clearly to successfully pass the SQL course exams.
The video covers the following topics:
1. Introduction to SQL: Basics of SQL, including its syntax and structure.
2.Querying with SQL: Using SELECT statements to retrieve data, filtering results with WHERE clauses, sorting with ORDER BY, and limiting results with LIMIT.
3.Aggregation and Group By: Using aggregate functions (COUNT, SUM, AVG, MIN, MAX) and the GROUP BY clause.
4.Modelling Database: Principles of database design, normalization, entity-relationship diagrams (ERDs), creating tables, and defining relationships.
5.Joins: Different types of joins (INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN) to combine rows from multiple tables.
6.Views and Subqueries: Creating and using views (virtual tables) and writing subqueries (queries within queries).
7.Transactions: Understanding transactions and ACID properties (Atomicity, Consistency, Isolation, Durability) for ensuring data integrity.
8.Indexes: Using indexes to speed up data retrieval.
By thoroughly understanding these core concepts, you will be well-prepared for the SQL course exams despite any changes in the question patterns.
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10 сен 2024
