Discuss basic relational database concepts
Use some of the OLAP features of DB2, such as GROUPing and RANKing functions
Create tables, views and indexes
Use referential integrity, check constraints and triggers
Use outer joins, and join tables to themselves
Use CASE expressions, and the CAST function
Identify the impact of Summary Tables, Materialized Query Tables, and
temporary tables
Use complex subqueries
Use a greater number of scalar SQL functions
Use advanced SQL constructs, such as recursive SQL and table expressions
Define User-Defined Distinct Types and User-Defined Functions
Avoid several of the most common causes for poorly-performing SQL
Požadované vstupné znalosti
You should have experience with:
- coding and executing basic SQL statements.
These skills can be developed by attending
- SQL Workshop (CE120GB), or equivalent experience.
Študijné materiály
Príručka ku kurzu firmy IBM podľa programu kurzu.
Osnova kurzu
Introduction
- Identify the purpose of the clauses in the SELECT statement
- Describe the key differences among the IBM DB2 platforms
- Describe and use some of the OLAP features of DB2, such as GROUPING
functions like CUBE and ROLLUP, and the RANK, DENSE_RANK and ROW_NUMBER
functions
Create Objects
- Code statements to: Create tables and views, Alter tables, Create indexes,
Implement referential integrity (RI), and Define triggers and check
constraints
- Identify impacts and advantages of referential integrity, including
impacts of delete rules
- Identify considerations when using triggers and check constraints
- Define and make use of INSTEAD OF triggers
Join
- Retrieve data from more than one table via inner and outer joins
- Use outer joins (LEFT, RIGHT, FULL)
- Use ANTI JOINS
- Join a table to itself
- Use UNION and UNION ALL
- Use EXCEPT and INTERCEPT
CASE, CAST, Summary Tables, and Materialized Query
Tables
- Identify when CASE expressions can be used
- Code CASE expressions in SELECT list and in the WHERE clause
- Identify when CAST specifications can be used
- Identify the advantages of using Summary (Materialized Query) Tables and
Temporary tables
- Identify the advantages of using Materialized Query Tables (MQTs)
- Identify when and how to use Temporary tables
Using Subqueries
- Code subqueries using the ALL, ANY/SOME, and EXISTS keywords
- Code correlated subqueries
- Choose the proper type of subquery to use in each case
Scalar Functions
- Extend your knowledge of scalar functions which: Manipulate arithmetic
data, Manipulate date values, and Manipulate character data
- Examples of scalar functions that are addressed in this course:
- SUBSTR
- POSSTR
- COALESCE/VALUE
- DECIMAL
- ROUND
- DIGITS
- CHAR
- DATE/TIME
Table Expressions and Recursive SQL
- Identify reasons for using table expressions and recursive SQL
- Use nested and common table expressions
- Identify the difference between views and table expressions
- Code recursive SQL
- Control the depth of recursion when coding recursive SQL
UDTs/UDFs and Performance
- Describe the concepts behind User-Defined Types, User-Defined Functions
and Stored Procedures
- Predict when queries will use indexes to get better performance
- Identify concepts of predicate processing
- State introductory concepts about index structure
- State general best practices advice
