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Course Outline
Limiting Results
- The WHERE clause
- Comparison operators
- LIKE condition
- BETWEEN ... AND condition
- IS NULL condition
- IN condition
- Boolean operators: AND, OR, and NOT
- Various conditions applicable within the WHERE clause
- Operator precedence
- DISTINCT clause
SQL Functions
- Differences between single-row and multi-row functions
- Text, numeric, and date functions
- Explicit and implicit data conversion
- Conversion functions
- Nested functions
- Testing function performance using the DUAL table
- Retrieving the current date using SYSDATE
- Handling NULL values
Aggregating Data with Grouping Functions
- Grouping functions overview
- How grouping functions handle NULL values
- Creating data groups using the GROUP BY clause
- Grouping by multiple columns
- Filtering grouped results using the HAVING clause
Subqueries
- Placing subqueries within the SELECT command
- Single-line versus multi-row subqueries
- Operators for single-row subqueries
- Using grouping functions within subqueries
- Operators for multi-row subqueries: IN, ALL, ANY
- Handling NULL values in subqueries
Set Operators
- UNION operator
- UNION ALL operator
- INTERSECT operator
- MINUS operator
Advanced Joins
- Review of Joins
- Combining Inner and Outer Joins
- Partitioned Outer Joins
- Hierarchical Queries
Advanced Usage of Subqueries
- Review of subqueries
- Utilizing subqueries as virtual tables/inline views and columns
- Using the WITH clause (Common Table Expressions)
- Combining subqueries and joins
Analytic Functions
- OVER clause
- PARTITION BY clause
- Windowing clause
- Functions: RANK, LEAD, LAG, FIRST, LAST
Retrieving Data from Multiple Tables (if time permits)
- Types of joins
- Using NATURAL JOIN
- Table aliases
- Joins in the WHERE clause
- INNER JOIN
- Outer Joins: LEFT, RIGHT, FULL OUTER
- Cartesian product
Aggregate Functions (if time permits)
- Review of GROUP BY and HAVING clauses
- GROUPING SETS and ROLLUP
- GROUPING SETS and CUBE
Requirements
It is recommended to have completed the "Oracle SQL for Beginners" training course prior to attendance.
14 Hours
Testimonials (2)
Greg was very patient and helpful
Chris Havel - Encyclopaedia Britannica
Course - ORACLE SQL Fundamentals
I found his methods very informative
