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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Creating Other Schema Objects | 10% | - Create, maintain, and use sequences - Create synonyms for database objects - Create, modify, and retrieve data from a view - Create and maintain indexes |
| Topic 2: Controlling User Access | 5% | - Grant privileges on tables and on a view - Distinguish between granting privileges and roles - Differentiate system privileges from object privileges |
| Topic 3: Displaying Data from Multiple Tables Using Joins | 15% | - 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 - Cross join tables - View data that does not meet a join condition by using outer joins |
| Topic 4: Using Set Operators | 5% | - Describe set operators - Describe the order of precedence when the set operators are used - Use a set operator to combine multiple queries into a single query |
| Topic 5: Using Subqueries to Solve Queries | 15% | - Define subqueries - Describe the types of problems that subqueries can solve - List the types of subqueries - Write single-row and multi-row subqueries |
| Topic 6: Manipulating Data | 14% | - Insert rows into a table - Control transactions - Describe each data manipulation language (DML) statement - Update rows in a table - Delete rows from a table |
| Topic 7: Restricting and Sorting Data | 6% | - Limit the rows that are retrieved by a query - Sort the rows that are retrieved by a query - Use ampersand substitution to restrict and sort output at runtime - Use DEFINE and UNDEFINE commands |
| Topic 8: Using DDL Statements to Create and Manage Tables | 14% | - Describe the data types that are available for columns - Create a simple table - Drop, rename, and truncate tables - Alter table definitions - Categorize the main database objects - Review the table structure |
| Topic 9: Working with Oracle Database SQL | 8% | - Describe the Oracle Database architecture - Explain the installation of Oracle Database software - Start up and shut down a database - Create a container database |
| Topic 10: Reporting Aggregated Data Using Group Functions | 15% | - Identify the available group functions - Include or exclude grouped rows by using the HAVING clause - Group data by using the GROUP BY clause - Describe the use of group functions |
| Topic 11: Using Conversion Functions and Conditional Expressions | 10% | - Use conditional IF THEN ELSE logic in a SELECT statement - 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 |
| Topic 12: Retrieving Data Using the SQL SELECT Statement | 5% | - Differentiate between SQL statements and SQL*Plus commands - Execute a basic SELECT statement - List the capabilities of SQL SELECT statements |
| Topic 13: Using Single-Row Functions to Customize Output | 10% | - Manipulate strings with character function in the SELECT and WHERE clauses - Describe the differences between single-row and multiple-row functions - Perform arithmetic with date data - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Manipulate dates with the date functions |
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NEW QUESTION # 142
Which two are true about the data dictionary?
Answer: C,D
Explanation:
C . True, the data dictionary is constantly updated to reflect changes to the metadata of the database objects, permissions, and structures, among other things.
E . True, the SYS user owns all base tables in the data dictionary. These base tables underlie all data dictionary views that are accessible by the users.
A, B, and D are not correct because: A. Base tables do not necessarily have the prefix DBA_; instead, DBA_ is a prefix for administrative views that are accessible to users with DBA privileges. B. The data dictionary records metadata about the actions, not the actions themselves. D. Not all users have access to all information in the data dictionary. Access is controlled by privileges.
Reference:
Oracle documentation on data dictionary and dynamic performance views: Oracle Database Reference Understanding the Oracle data dictionary: Oracle Database Concepts
NEW QUESTION # 143
In the PROMOTIONS table, the PROMO_BEGIN_DATEcolumn is of data type DATEand the default date format is DD-MON-RR.
Which two statements are true about expressions using PROMO_BEGIN_DATEcontained a query? (Choose two.)
Answer: C,D
NEW QUESTION # 144
Examine the structure of the BOOKS_TRANSACTIONS table:
Examine the SQL statement:
Which statement is true about the outcome?
Answer: B
NEW QUESTION # 145
Which two are true about the USING clause when joining tables?
Answer: B,D
Explanation:
When joining tables in Oracle Database 12c, the USING clause has specific behaviors:
* Option C: It is used to specify an equijoin of columns that have the same name in both tables.
* The USING clause is indeed used to specify an equijoin between two tables based on columns with identical names in the tables being joined. It simplifies the syntax of the JOIN operation by eliminating the need to qualify the joined columns with table names.
* Option D: It can never be used with a full outer join.
* The USING clause cannot be used with a full outer join because the full outer join requires a specification of how to treat each side of the join, including rows that don't match the join condition, which is not compatible with the semantics of the USING clause.
Options A, B, and E are incorrect:
* Option A is incorrect because when using the USING clause, you do not need to qualify the columns with table names or aliases in the select list; Oracle assumes that they are the same in both tables.
* Option B is incorrect because the USING clause can be used with natural joins.
* Option E is incorrect as the USING clause is not meant to specify explicit join conditions with operators; it's specifically for equijoins on columns of the same name.
NEW QUESTION # 146
Examine the structure of the ORDERS table: (Choose the best answer.)
You want to find the total value of all the orders for each year and issue this command:
SQL> SELECT TO_CHAR(order_date,'rr'), SUM(order_total) FROM orders
GROUP BY TO_CHAR(order_date, 'yyyy');
Which statement is true regarding the result?
Answer: D
NEW QUESTION # 147
......
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