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You Will Learn How To
- Develop complex and robust SQL queries for SQL Server 2008, 2005 and 2000
- Query multiple tables with inner joins, outer joins and self joins
- Transform data with built-in functions
- Summarize data using aggregation and grouping
- Execute analytic functions to calculate ranks
- Build simple and correlated subqueries
Course Benefits Microsoft's Transact-SQL is the cornerstone of all SQL Server database operations. In this hands-on course, you learn to exploit the full potential of the SELECT statement to write robust queries using the best query method for your application, test your queries, and avoid common errors and pitfalls.
Who Should Attend Those who are developing systems using SQL Server databases or who are using SQL to extract and analyze data from SQL Server databases. Knowledge of SQL Server at the level of Course 137, " SQL Server 2008 Comprehensive Introduction," or Course 925, " SQL Programming Language Introduction," is assumed.
Hands-On Training Learn by doing as you use Transact-SQL to solve problems and maximize performance. Instructor-led exercises include:
- Handling NULL values in expressions and conditions
- Coding inner and outer joins
- Implementing self joins
- Computing aggregate results
- Adding subtotals and grand totals to aggregate results
- Employing ranking and analytic functions
- Reusing subqueries as common table expressions
- Analyzing query plans and tuning queries
Course 534 Content Introduction and Overview
SQL fundamentals
- Retrieving data with SELECT
- Expressions
- Literals
- Handling NULLs properly
Executing queries
- Analyzing query plans
- Enhancing query performance
- Testing queries
- 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
Scalar and Aggregate Functions
Taking advantage of scalar functions
- Converting datatypes
- Handling dates
- Manipulating strings
- Choosing the right function for the job
Summarizing data with aggregate functions
- COUNT
- SUM
- AVG
- MIN
- MAX
- Managing NULLs
- Suppressing duplicates
Grouping data
- GROUP BY and GROUPING SETS
- Applying conditions with HAVING
- Calculating moving averages
Extending group queries
- Nesting grouped aggregates
- Joins and grouping
- Introducing subtotals with CUBE and ROLLUP
Building crosstab reports
- Using CASE to turn rows into columns
- Applying PIVOT and UNPIVOT
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
Extending the use of aggregates
- Partitioning in multiple levels
- Computing running totals
- Comparing row and aggregate values
Building Subqueries
Simple subqueries
- Subqueries in conditions and column expressions
- Creating multilevel subqueries
- Avoiding problems when subqueries return NULLs
- Handling multirow subquery results
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
- Exploring alternatives for decomposing: tables, views, common table expressions, table variables
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Course Dates | Oct 26 - 29 | Ottawa enrol | | Nov 23 - 26 | Toronto enrol | | Feb 22 - 25 | Ottawa enrol | | Mar 22 - 25 | Toronto enrol | | Jun 21 - 24 | Ottawa enrol | | Jul 19 - 22 | Toronto enrol | US Dates | | Oct 12 - 15 | Chicago (Schaumburg) enrol | | Nov 2 - 5 | New York enrol | | Nov 9 - 12 | Rockville, MD enrol | | Dec 7 - 10 | Los Angeles enrol |
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Course participants building correlated subqueries.
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