Programming and Development Training Class Schedule
Training Schedule
(100677) Introduction to Writing SQL Queries (TTSQL003)
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Location: | Date | Guaranteed to Run: |
Live Virtual, US | 08/22/2022 | |
Live Virtual, US | 10/03/2022 | |
Live Virtual, US | 11/14/2022 | |
Live Virtual, US | 12/12/2022 |
Not finding any suitable dates? Contact us for additional availability: training@dunnsolutions.com
- You should have a basic understanding of SQL.
- Introduction and Overview
- SQL fundamentals
- Why SQL can be both easy and difficult
- Recommendations for thorough testing
- Retrieving data with SELECT
- Expressions
- Literals
- Handling NULLs properly
- Executing queries
- Analyzing query plans
- Enhancing query performance
- Retrieving partly results with FETCH and OFFSET
- Selecting the best alternatives
- Avoiding errors and pitfalls
- Querying Multiple Tables
- Implementing various types of joins
- Inner joins
- Cross joins
- Left, right and full outer joins
- Equijoins vs. theta joins
- The performance implications of joins
- Adding filter conditions to outer joins
- Writing self joins
- Joining a table to itself
- Chaining self joins
- Solving time-interval problems
- Combining queries with set operators
- UNION
- UNION ALL
- INTERSECT
- EXCEPT
- Aggregate Functions
- Summarizing data with aggregate functions
- COUNT
- SUM
- AVG
- MIN
- MAX
- Managing NULLs
- identifying duplicates
- Grouping data
- GROUP B
- Applying conditions with HAVING
- Calculating moving averages
- Building crosstab reports
- Extending group queries
- Nesting grouped aggregates
- Joins and grouping
- Introducing subtotals with CUBE and ROLLUP
- Performing Extensive Analysis with Analytic Functions
- The OVER clause
- Specifying the ordering before applying the function
- Splitting the result set into logical partitions
- Calculating ranks
- RANK and DENSE_RANK
- ROW_NUMBER with ordered sets
- Calculating percentiles
- Extending the use of aggregates
- Partitioning in multiple levels
- Computing running totals
- Comparing row and aggregate values
- Top-N queries
- Defining sliding window boundaries
- Self-contained subqueries
- Subqueries in conditions and column expressions
- Creating multilevel subqueries
- Avoiding problems when subqueries return NULLs
- Handling multirow subquery results
- Finding gaps in number series
- Correlated subqueries
- Accessing values from the outer query
- EXISTS vs. IN
- Identifying duplicates
- Avoiding accidental correlation
- Common table expressions
- Reusable subqueries
- Recursive subqueries
- Traversing hierarchies
- Breaking Down Complex Queries
- Overcoming SQL limitations
- Reducing complexity and improving performance
The course describes the ANSI/ISO SQL standard, but also identifies deviations from the standard in the two most widely used database products, Oracle and Microsoft SQL Server.
RELATED CERTIFICATIONS
None
Follow-On Courses:
None
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