Introduction to Writing SQL Queries (TTSQL003)
A company’s success hinges on responsible, accurate database management. Organizations rely on highly available data to complete all sorts of tasks, from creating marketing reports and invoicing customers to setting financial goals. Data professionals like analysts, developers and architects are tasked with creating, optimizing, managing and analyzing data from databases – with little room for error. When databases aren’t built or maintained correctly, it’s easy to mishandle or lose valuable data. Our SQL Programming and Database Training Series provides students with the skills they require to develop, analyze and maintain data and in correctly structured, modern and secure databases. SQL is the cornerstone of all relational 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. It also teaches alternative solutions to given problems, enabling you to choose the most efficient solution in each situation.
Course Objectives
This course combines expert lecture, real-world demonstrations and group discussions with machine-based practical labs and exercises. Working in a hands-on learning environment led by our expert practitioner, attendees will learn to:
- Maximize the potential of SQL to build powerful, complex and robust SQL queries Query multiple tables with inner joins, outer joins and self joins Construct recursive common table expressions Summarize data using aggregation and grouping Execute analytic functions to calculate ranks Build simple and correlated subqueries Thoroughly test SQL queries to avoid common errors Select the most efficient solution to complex SQL problems
Agenda
- Introduction to SQL and its development environments
- Using SQL*PLUS
- Using SQL Developer
- Capabilities of the SELECT statement
- Arithmetic expressions and NULL values in the SELECT statement
- Column aliases
- Use of concatenation operator, literal character strings, alternative quote operator, and the DISTINCT keyword
- Use of the DESCRIBE command
- Limiting the Rows
- Rules of precedence for operators in an expression
- Substitution Variables
- Using the DEFINE and VERIFY command
- Describe the differences between single row and multiple row functions
- Manipulate strings with character function in the SELECT and WHERE clauses
- Manipulate numbers with the ROUND, TRUNC and MOD functions
- Perform arithmetic with date data
- Manipulate dates with the date functions
- Describe implicit and explicit data type conversion
- Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions
- Nest multiple functions
- Apply the NVL, NULLIF, and COALESCE functions to data
- Decode/Case Statements
- Group Functions
- Creating Groups of Data
- Having Clause
- Cube/Rollup Clause
- Introduction to JOINS
- Types of Joins
- Natural join
- Self-join
- Non equijoins
- OUTER join
- Introduction to Subqueries
- Single Row Subqueries
- Multiple Row Subqueries
- Set Operators
- UNION and UNION ALL operator
- INTERSECT operator
- MINUS operator
- Matching the SELECT statements
- Data Manipulation Language
- Database Transactions
- Insert
- Update
- Delete
- Merge
- Data Definition Language
- Create
- Alter
- Drop
- Introduction to Data Dictionary
- Describe the Data Dictionary Structure
- Using the Data Dictionary views
- Querying the Data Dictionary Views
- Dynamic Performance Views
- Creating sequences
- Creating synonyms
- Creating indexes
- Index Types
- Creating Views
- Altering Views
- Replacing Views
- Managing constraints
- Creating and using temporary tables
- Creating and using external tables
- Retrieving Data by Using a Subquery as Source
- Working with Multiple-Column subqueries
- Correlated Subqueries
- Non-Correlated Subqueries
- Using Subqueries to Manipulate Data
- Using the Check Option
- Subqueries in Updates and Deletes
- In-line Views
- System privileges
- Creating a role
- Object privileges
- Revoking object privileges
- Overview of the Explicit Default Feature
- Using multitable INSERTs
- Using the MERGE statement
- Tracking Changes in Data
FREE
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Course Type: Instructor Led