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| Section | Weight | Objectives |
|---|---|---|
| Reporting Aggregated Data Using Group Functions | 15% | - Describe the use of group functions - Identify the available group functions - Include or exclude grouped rows by using the HAVING clause - Group data by using the GROUP BY clause |
| Retrieving Data Using the SQL SELECT Statement | 5% | - Execute a basic SELECT statement - Differentiate between SQL statements and SQL*Plus commands - List the capabilities of SQL SELECT statements |
| Restricting and Sorting Data | 6% | - Limit the rows that are retrieved by a query - Sort the rows that are retrieved by a query - Use DEFINE and UNDEFINE commands - Use ampersand substitution to restrict and sort output at runtime |
| Using Subqueries to Solve Queries | 15% | - Write single-row and multi-row subqueries - Define subqueries - List the types of subqueries - Describe the types of problems that subqueries can solve |
| Creating Other Schema Objects | 10% | - Create and maintain indexes - Create synonyms for database objects - Create, maintain, and use sequences - Create, modify, and retrieve data from a view |
| Using DDL Statements to Create and Manage Tables | 14% | - Categorize the main database objects - Alter table definitions - Describe the data types that are available for columns - Review the table structure - Create a simple table - Drop, rename, and truncate tables |
| Using Set Operators | 5% | - Describe the order of precedence when the set operators are used - Use a set operator to combine multiple queries into a single query - Describe set operators |
| Working with Oracle Database SQL | 8% | - Explain the installation of Oracle Database software - Create a container database - Describe the Oracle Database architecture - Start up and shut down a database |
| Using Single-Row Functions to Customize Output | 10% | - Manipulate dates with the date functions - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Manipulate strings with character function in the SELECT and WHERE clauses - Perform arithmetic with date data - Describe the differences between single-row and multiple-row functions |
| Displaying Data from Multiple Tables Using Joins | 15% | - Cross join tables - Join a table to itself by using a self-join - Write SELECT statements to access data from more than one table using equijoins and non-equijoins - View data that does not meet a join condition by using outer joins |
| Controlling User Access | 5% | - Differentiate system privileges from object privileges - Grant privileges on tables and on a view - Distinguish between granting privileges and roles |
| Using Conversion Functions and Conditional Expressions | 10% | - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions - Describe implicit and explicit data type conversion - Apply the NVL, NULLIF, and COALESCE functions to data - Use conditional IF THEN ELSE logic in a SELECT statement |
| Manipulating Data | 14% | - Control transactions - Insert rows into a table - Delete rows from a table - Update rows in a table - Describe each data manipulation language (DML) statement |
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NEW QUESTION # 22
View the Exhibit and examine the structure of the ORDERS table. The ORDER_ID column is the PRIMARY KEY in the ORDERS table.
Evaluate the following CREATE TABLE command:
CREATE TABLE new_orders(ord_id, ord_date DEFAULT SYSDATE, cus_id)
AS
SELECT order_id.order_date,customer_id
FROM orders;
Which statement is true regarding the above command?
Answer: D
NEW QUESTION # 23
Which two statements about INVISIBLE indexes are true?
Answer: B,D
Explanation:
INVISIBLE indexes are a feature in Oracle Database 12c and later versions that allow an index to be maintained but not used by the optimizer unless explicitly hinted.
A). False. An INVISIBLE index still consumes storage space as it is maintained in the background.
B). False. There is no such restriction. You can create multiple INVISIBLE indexes on the same column list.
C). False. The optimizer can consider INVISIBLE indexes if they are hinted at in the query.
D). True. You can alter the visibility of an index using the ALTER INDEX command to make an INVISIBLE index VISIBLE.
E). True. Even though they are invisible to the optimizer by default, all DML operations such as INSERT, UPDATE, and DELETE continue to maintain the index as they would with a VISIBLE index.
NEW QUESTION # 24
View and Exhibit and examine the structure and data in the INVOICE table.
Which two statements are true regarding data type conversion in query expressions? (Choose two.)
Answer: B,E
NEW QUESTION # 25
Which two statements are true regarding savepoints? (Choose two.)
Answer: D,E
NEW QUESTION # 26
Which two statements are true about the data dictionary? (Choose two.)
Answer: B,D
Explanation:
ALL_ -include objects all objects (from all schemas) accessible to the current user.
https://dataedo.com/blog/useful-oracle-data-dictionary-queries-every-dba-should-have
https://docs.oracle.com/cd/E11882_01/server.112/e40540/datadict.htm
NEW QUESTION # 27
......
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