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| Section | Weight | Objectives |
|---|---|---|
| Displaying Data from Multiple Tables Using Joins | 15% | - View data that does not meet a join condition by using outer joins - Write SELECT statements to access data from more than one table using equijoins and non-equijoins - Cross join tables - Join a table to itself by using a self-join |
| Using Conversion Functions and Conditional Expressions | 10% | - Use conditional IF THEN ELSE logic in a SELECT statement - Describe implicit and explicit data type conversion - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions - Apply the NVL, NULLIF, and COALESCE functions to data |
| Using Single-Row Functions to Customize Output | 10% | - Perform arithmetic with date data - Manipulate dates with the date functions - 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 |
| Creating Other Schema Objects | 10% | - Create, maintain, and use sequences - Create and maintain indexes - Create, modify, and retrieve data from a view - Create synonyms for database objects |
| Controlling User Access | 5% | - Differentiate system privileges from object privileges - Distinguish between granting privileges and roles - Grant privileges on tables and on a view |
| Restricting and Sorting Data | 6% | - Use ampersand substitution to restrict and sort output at runtime - Sort the rows that are retrieved by a query - Limit the rows that are retrieved by a query - Use DEFINE and UNDEFINE commands |
| 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 |
| 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 |
| 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 |
| Reporting Aggregated Data Using Group Functions | 15% | - Identify the available group functions - Describe the use of group functions - Include or exclude grouped rows by using the HAVING clause - Group data by using the GROUP BY clause |
| Working with Oracle Database SQL | 8% | - Create a container database - Describe the Oracle Database architecture - Start up and shut down a database - Explain the installation of Oracle Database software |
| Using Subqueries to Solve Queries | 15% | - Define subqueries - List the types of subqueries - Describe the types of problems that subqueries can solve - Write single-row and multi-row subqueries |
| Using DDL Statements to Create and Manage Tables | 14% | - Drop, rename, and truncate tables - Describe the data types that are available for columns - Create a simple table - Alter table definitions - Categorize the main database objects - Review the table structure |
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NEW QUESTION # 355
Which two statements are true regarding savepoints? (Choose two.)
Answer: B,C
Explanation:
Explanation/Reference:
Reference: https://docs.oracle.com/cd/B19306_01/server.102/b14200/
statements_10001.htm#SQLRF01701
NEW QUESTION # 356
Examine this query:
SELECT 2 FROM dual d1 CROSS JOIN dual d2 CROSS JOIN dual d3;
What is returned upon execution?
Answer: F
Explanation:
The given query is using the CROSS JOIN clause, which produces a Cartesian product of the tables involved. The DUAL table in Oracle is a special one-row, one-column table present by default in all Oracle database installations. When you cross join the DUAL table with itself multiple times without any where clause to limit the rows, the result is a multiplication of the row count for each cross-joined instance.
Since DUAL has a single row, cross-joining it with itself any number of times will still result in a single row being returned. The SELECT 2 part of the query simply dictates that the number 2 will be the value in the column of this single row.
So, the result of this query will be one row with a single column containing the value 2.
Reference:
Oracle Database SQL Language Reference 12c, especially sections on join operations and the DUAL table.
NEW QUESTION # 357
Examine the command to create the BOOKS table.
The BOOK_IDvalue 101does not exist in the table.
Examine the SQL statement:
Which statement is true?
Answer: D
NEW QUESTION # 358
Examine the command:
SQL> ALTER TABLE books_transactions
ADD CONSTRAINT fk_book_id FOREIGN KEY (book_id)
REFERENCES books (book_id) ON DELETE CASCADE;
What does ON DELETE CASCADE imply?
Answer: D
NEW QUESTION # 359
On your Oracle 12c database, you invoked SQL *Loader to load data into the EMPLOYEES table in the HR schema by issuing the following command:
$> sqlldr hr/hr@pdb table=employees
Which two statements are true regarding the command?
Answer: B,C
NEW QUESTION # 360
......
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