Duration
21 hours (usually 3 days including breaks)
Requirements
- Computer literacy
- Knowledge of any operating system
Overview
Listeners
This training is addressed for people starting to work with the SQL language in Oracle database
The course answer for questions:
- How to build a query?
- What possibilities have SQL?
- What is a relational database?
- What is the structure and SQL commands
Course Outline
Relational database models
- The structure of a relational database
- Connection types of tables
- The normalization and denormalization database
- Relational Operators
Download the data
- Rules for writing SQL queries
- The syntax for the SELECT
- Selecting all columns
- Inquiries from arithmetic operations
- Aliases columns
- Literals
- Concatenation operator
Limiting results
- The WHERE clause
- Comparison operators
- LIKE Condition
- Prerequisite BETWEEN … AND
- IS NULL condition
- Condition IN
- Boolean operators AND, OR and NOT
- Many of the conditions in the WHERE clause
- The order of the operators.
- DISTINCT clause
Sorting Data
- The ORDER BY clause
- Sorting by multiple columns or expressions
SQL functions
- The differences between the functions of one and multilines
- Features text, numeric, date,
- Explicit and implicit conversion
- Conversion functions
- Nesting functions
- Viewing the performance of the functions – dual table
- Getting the current date function SYSDATE
- Handling of NULL values
Aggregating data using the grouping
- Grouping functions
- How grouping functions treat NULL values
- Create groups of data – the GROUP BY clause
- Grouping multiple columns
- Limiting the function result grouping – the HAVING clause
Retrieving data from multiple tables
- Types of connectors
- The use NATURAL JOIN
- Aliases tables
- Joins in the WHERE clause
- INNER JOIN Inner join
- External Merge LEFT, RIGHT, FULL OUTER JOIN
- Cartesian product
Subqueries
- Place subqueries in the SELECT command
- Subqueries single and multi-lineage
- Operators Subqueries single-line
- Features grouping in subquery
- Operators Subqueries multi-IN, ALL, ANY
- How NULL values are treated in subqueries
Operators collective
- UNION operator
- UNION ALL operator
- INTERSECT operator
- MINUS operator
Insert, update, and delete data
- INSERT command
- Copy data from another table
- UPDATE command
- DELETE command
- TRUNCATE command
Transactions
- Commands COMMIT, ROLLBACK, and SAVEPOINT
DDL commands
- The main database objects
- Rules for naming objects
- Creating tables
- The data types available for columns
- DEFAULT option
- Option NULL and NOT NULL
Managing tables
- Referential integrity CHECK, PRIMARY KEY, FOREIGN KEY, UNIQUE
- Create a table by the query
- Delete a table DROP TABLE
- DESCRIBE command
Other schema objects
- Sequences
- Synonyms
- Views
