Course Outline
Retrieving data from the database
- Syntax guidelines
- Selecting all columns
- Projection techniques
- Arithmetic operations in SQL
- Column aliases
- Literal values
- String concatenation
Filtering result sets
- The WHERE clause
- Comparison operators
- The LIKE condition
- The BETWEEN...AND condition
- The IS NULL condition
- The IN condition
- Logical operators: AND, OR, NOT
- Implementing multiple conditions in the WHERE clause
- Operator precedence
- The DISTINCT clause
Sorting result sets
- The ORDER BY clause
- Sorting by multiple columns or expressions
SQL Functions
- Differences between single-row and multi-row functions
- Character, numeric, and DateTime functions
- Explicit and implicit data conversion
- Data conversion functions
- Nested functions
- The Dual table (Oracle vs. other databases)
- Retrieving the current date and time using various functions
Aggregating data with aggregate functions
- Overview of aggregate functions
- Handling NULL values in aggregate functions
- The GROUP BY clause
- Grouping by different columns
- Filtering aggregated results using the HAVING clause
- Multi-dimensional data grouping using ROLLUP and CUBE operators
- Identifying summary rows with GROUPING
- The 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 products in Oracle and SQL99 syntax
Subqueries
- When and where to use subqueries
- Single-row and multi-row subqueries
- Operators for single-row subqueries
- Using aggregate functions within subqueries
- Operators for multi-row subqueries: 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 examples
- Constructing trees using CONNECT BY PRIOR and START WITH clauses
- The SYS_CONNECT_BY_PATH function
Conditional expressions
- CASE expression
- DECODE expression
Managing data across time zones
- Understanding time zones
- TIMESTAMP data types
- Differences between DATE and TIMESTAMP
- Conversion operations
Analytic functions
- Overview and usage
- Partitions
- Windows
- Rank functions
- Reporting functions
- LAG/LEAD functions
- FIRST/LAST functions
- Inverse percentile functions
- Hypothetical rank functions
- WIDTH_BUCKET functions
- Statistical functions
Requirements
There are no specific prerequisites for attending 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
