Course Outline
Data Extraction from Databases
- Syntactic conventions
- Retrieving all columns
- Projection operations
- Performing arithmetic operations in SQL
- Assigning column aliases
- Use of literals
- String concatenation
Filtering Result Sets
- Utilizing the WHERE clause
- Application of comparison operators
- Employing the LIKE condition
- Using the BETWEEN...AND condition
- Handling null values with IS NULL
- Using the IN condition
- Logic operators: AND, OR, NOT
- Combining multiple conditions in the WHERE clause
- Operator precedence
- Eliminating duplicates with the DISTINCT clause
Sorting Result Sets
- Applying the ORDER BY clause
- Sorting by multiple columns or complex expressions
SQL Functionality
- Distinguishing between single-row and multi-row functions
- Character, numeric, and DateTime functions
- Explicit versus implicit data conversion
- Utilization of conversion functions
- Nesting functions
- The Dual table (Oracle compatibility vs. other databases)
- Retrieving current date and time using various functions
Aggregating Data with Aggregate Functions
- Overview of aggregate functions
- Handling aggregate functions and NULL values
- Using the GROUP BY clause
- Grouping by different column combinations
- Filtering aggregated results with the HAVING clause
- Multi-dimensional grouping using ROLLUP and CUBE operators
- Identifying summary rows with GROUPING
- The GROUPING SETS operator
Retrieving Data Across Multiple Tables
- Various types of joins
- NATURAL JOIN implementation
- Defining table aliases
- Oracle syntax: join conditions within the WHERE clause
- SQL99 syntax: INNER JOIN
- SQL99 syntax: LEFT, RIGHT, and FULL OUTER JOINS
- Cartesian products: Oracle and SQL99 syntax variations
Subqueries
- Appropriate contexts for subquery usage
- Differences between single-row and multi-row subqueries
- Operators for single-row subqueries
- Incorporating aggregate functions into subqueries
- Operators for multi-row subqueries: IN, ALL, ANY
Set Operators
- UNION
- UNION ALL
- INTERSECT
- MINUS/EXCEPT
Transaction Management
- COMMIT, ROLLBACK, and SAVEPOINT statements
Additional Schema Objects
- Sequences
- Synonyms
- Views
Hierarchical Queries and Sampling
- Tree structure construction (CONNECT BY PRIOR and START WITH clauses)
- Using the SYS_CONNECT_BY_PATH function
Conditional Logic
- CASE expressions
- DECODE expressions
Managing Data Across Time Zones
- Time zone concepts
- TIMESTAMP data types
- Distinguishing DATE from TIMESTAMP
- Time zone conversion operations
Analytic Functions
- Application scenarios
- Partitions
- Windows
- Ranking functions
- Reporting functions
- LAG/LEAD functions
- FIRST/LAST functions
- Reverse percentile functions
- Hypothetical rank functions
- WIDTH_BUCKET functions
- Statistical functions
Requirements
No specific prior requirements are necessary to participate in this course.
Testimonials (7)
I liked the pace of the training and the level of interaction. All participants were encouraged to actively partake in discussions around exercise solutions, etc.
Aaron - Computerbits
Course - SQL Advanced level for Analysts
The trainer's efforts to make sure the less knowledgeable participants weren't being left behind.
Cian - Computerbits
Course - SQL Advanced level for Analysts
I greatly appreciated the interactive nature of the class, where the trainer actively engaged with attendees to ensure they were comprehending the material. Additionally, the trainer's excellent understanding of various database manipulation tools significantly enriched his presentations, providing a comprehensive overview of the tools' capabilities.
Kehinde - Computerbits
Course - SQL Advanced level for Analysts
Lukasz's teaching approach is far superior to traditional methods. His engaging and innovative style made the training sessions incredibly effective and enjoyable. I highly recommend Lukasz and NobleProg to anyone seeking top-notch training. The experience was truly transformative, and I feel much more confident in applying what I've learned
Adnan Chaudhary - Computerbits
Course - SQL Advanced level for Analysts
The training was incredibly interactive, making it both engaging and enjoyable. The activities and discussions effectively reinforced the material. Every necessary topic was covered thoroughly, with a well-structured and easy-to-follow format that ensured we gained a solid understanding of the subject. The inclusion of real-world examples and case studies was particularly beneficial, helping us see how the concepts could be applied in practical scenarios. Łukasz fostered a supportive and inclusive atmosphere where everyone felt comfortable asking questions and participating, which greatly enhanced the overall learning experience. His expertise and ability to explain complex topics in a simple manner were impressive, and his guidance was invaluable in helping us grasp difficult concepts. Łukasz's enthusiasm and positive energy were contagious, making the sessions lively and motivating us to stay engaged and participate actively. Overall, the training was a fantastic experience, and I feel much more confident in my abilities thanks to the excellent instruction provided.
Karol Jankowski - Computerbits
Course - SQL Advanced level for Analysts
Extremely happy with Luke as a trainer. He is very engaging and explains each topic in a way that i could understand. He was also very willing to answer questions. I would highly recommend him as a trainer going forward. I ask a LOT of questions, and Luke was always more than happy to take the time to answer them.
Paul - Computerbits
Course - SQL Advanced level for Analysts
How he explains things
