Course Outline
Data Selection from Databases
- Syntax conventions
- Retrieving all columns
- Projection
- Arithmetic operations in SQL
- Column aliases
- Literals
- String concatenation
Filtering Result Sets
- WHERE clause usage
- Comparison operators
- LIKE condition
- BETWEEN...AND condition
- IS NULL condition
- IN condition
- Logical operators (AND, OR, NOT)
- Combining multiple conditions in the WHERE clause
- Operator precedence
- DISTINCT clause
Sorting Result Sets
- ORDER BY clause
- Sorting by multiple columns or expressions
SQL Functions
- Distinction between single-row and multi-row functions
- Character, numeric, and DateTime functions
- Explicit and implicit type conversion
- Conversion functions
- Nested function calls
- Dual table usage (Oracle vs. other databases)
- Retrieving current date and time using various functions
Aggregating Data with Aggregate Functions
- Overview of aggregate functions
- Handling NULL values in aggregates
- GROUP BY clause
- Grouping by multiple columns
- Filtering aggregated results with the HAVING clause
- Multidimensional grouping using ROLLUP and CUBE operators
- Identifying summary rows with GROUPING
- GROUPING SETS operator
Retrieving Data from Multiple Tables
- Various types of joins
- NATURAL JOIN
- Table aliases
- Oracle syntax - join conditions in the WHERE clause
- SQL99 syntax - INNER JOIN
- SQL99 syntax - LEFT, RIGHT, and FULL OUTER JOINS
- Cartesian product - Oracle and SQL99 syntax
Subqueries
- Appropriate contexts for subqueries
- Single-row and multi-row subqueries
- Single-row subquery operators
- Using aggregate functions in subqueries
- Multi-row subquery operators - IN, ALL, ANY
Set Operators
- UNION
- UNION ALL
- INTERSECT
- MINUS/EXCEPT
Transactions
- COMMIT, ROLLBACK, and SAVEPOINT statements
Other Schema Objects
- Sequences
- Synonyms
- Views
Hierarchical Queries and Samples
- Tree structure construction (CONNECT BY PRIOR and START WITH clauses)
- SYS_CONNECT_BY_PATH function
Conditional Expressions
- CASE expression
- DECODE expression
Data Management Across Time Zones
- Time zone concepts
- TIMESTAMP data types
- Differences between DATE and TIMESTAMP
- Time zone conversion operations
Analytic Functions
- Application of analytic functions
- Partitions
- Windows
- Rank functions
- Reporting functions
- LAG/LEAD functions
- FIRST/LAST functions
- Reverse percentile functions
- Hypothetical rank functions
- WIDTH_BUCKET functions
- Statistical functions
Requirements
No prior specific requirements or prerequisites are necessary to enrol 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
