Oracle Database SQL Expert

Oracle DBA recommended training provides the best DBA course(s) to help you prepare for your OCP exam. Exam topics may not map exactly, a multifaceted preparation approach is recommended.Restricting and Sorting Data

• Limit the rows that are retrieved by a query
• Sort the rows that are retrieved by a query
• Use substitution variables
• Use the SQL row limiting clause
• Create queries using the PIVOT and UNPIVOT clause
• Use pattern matching to recognize patterns across multiple rows in a table

Using Single-Row Functions to Customize Output

• Describe various types of functions that are available in SQL
• Use character, number, and date and analytical (PERCENTILE_CONT, STDDEV, LAG, LEAD) functions in SELECT statements
• Use conversion functions

Reporting Aggregated Data Using the Group Functions

• Identify the available group functions
• Use group functions
• Group data by using the GROUP BY clause
• Include or exclude grouped rows by using the HAVING clause

Displaying Data from Multiple Tables

• Use equijoins and nonequijoins
• Use a self-join
• Use outer joins
• Generate a Cartesian product of all rows from two or more tables
• Use the cross_outer_apply_clause

Using Subqueries to Solve Queries

• Use subqueries
• List the types of subqueries
• Use single-row and multiple-row subqueries
• Create a lateral inline view in a query

EXTRACT Managing Schema Objects

• Manage constraints
• Create and maintain indexes including invisible indexes and multiple indexes on the same columns
• Create indexes using the CREATE TABLE statement
• Create function-based indexes
• Drop columns and set column UNUSED
• Perform flashback operations
• Create and use external tables

Manipulating Large Data Sets

• Manipulate data using subqueries
• Describe the features of multitable INSERTs
• Use multitable inserts
• Unconditional INSERT
• Pivoting INSERT
• Conditional ALL INSERT
• Conditional FIRST INSERT
• Merge rows in a table
• Track the changes to data over a period of time
• Use explicit default values in INSERT and UPDATE statements

Generating Reports by Grouping Related Data

• Use the ROLLUP operation to produce subtotal values
• Use the CUBE operation to produce crosstabulation values
• Use the GROUPING function to identify the row values created by ROLLUP or CUBE
• Use GROUPING SETS to produce a single result set

Using the Set Operators

• Explain set operators
• Use a set operator to combine multiple queries into a single query
• Control the order of rows returned

Manipulating Data

• Describe the DML statements
• Insert rows into a table
• Update rows in a table
• Delete rows from a table
• Control transactions

Using DDL Statements to Create and Manage Tables

• Categorize the main database objects
• Review the table structure
• Describe the data types that are available for columns
• Create tables
• Create constraints for tables
• Describe how schema objects work
• Truncate tables, and recursively truncate child tables
• Use 12c enhancements to the DEFAULT clause, invisible columns, virtual columns and identity columns in table creation/alteration

Creating Other Schema Objects

• Create simple and complex views with visible/invisible columns
• Retrieve data from views
• Create, maintain and use sequences
• Create private and public synonyms

Managing Objects with Data Dictionary Views

• Query various data dictionary views

Controlling User Access

• Differentiate system privileges from object privileges
• Grant privileges on tables and on a user
• View privileges in the data dictionary
• Grant roles
• Distinguish between privileges and roles

Managing Data in Different Time Zones

• Use various date time functions
• TZ_OFFSET
• FROM_TZ
• TO_TIMESTAMP
• TO_TIMESTAMP_TZ
• TO_YMINTERVAL
• TO_DSINTERVAL
• CURRENT_DATE
• CURRENT_TIMESTAMP
• LOCALTIMESTAMP
• DBTIMEZONE
• SESSIONTIMEZONE

Retrieving Data Using Subqueries

• Use multiple-column subqueries
• Use scalar subqueries
• Use correlated subqueries
• Update and delete rows using correlated subqueries
• Use the EXISTS and NOT EXISTS operators
• Use the WITH clause

Hierarchical Retrieval                           

• Interpret the concept of a hierarchical query
• Create a tree-structured report
• Format hierarchical data
• Exclude branches from the tree structure

Regular Expression Support

• Use meta Characters
• Use regular expression functions to search, match and replace
• Use replacing patterns
• Use regular expressions and check constraints

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