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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using DDL Statements to Create and Manage Tables | 14% | - Create a simple table - Drop, rename, and truncate tables - Alter table definitions - Review the table structure - Categorize the main database objects - Describe the data types that are available for columns |
| Topic 2: Displaying Data from Multiple Tables Using Joins | 15% | - Cross join tables - 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 - Join a table to itself by using a self-join |
| Topic 3: Using Single-Row Functions to Customize Output | 10% | - Describe the differences between single-row and multiple-row functions - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Perform arithmetic with date data - Manipulate strings with character function in the SELECT and WHERE clauses - Manipulate dates with the date functions |
| Topic 4: Using Conversion Functions and Conditional Expressions | 10% | - 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 - Use conditional IF THEN ELSE logic in a SELECT statement |
| Topic 5: Working with Oracle Database SQL | 8% | - Create a container database - Explain the installation of Oracle Database software - Start up and shut down a database - Describe the Oracle Database architecture |
| Topic 6: Manipulating Data | 14% | - Insert rows into a table - Delete rows from a table - Control transactions - Describe each data manipulation language (DML) statement - Update rows in a table |
| Topic 7: Creating Other Schema Objects | 10% | - Create, maintain, and use sequences - Create synonyms for database objects - Create and maintain indexes - Create, modify, and retrieve data from a view |
| Topic 8: Restricting and Sorting Data | 6% | - Sort the rows that are retrieved by a query - Limit the rows that are retrieved by a query - Use ampersand substitution to restrict and sort output at runtime - Use DEFINE and UNDEFINE commands |
| Topic 9: Controlling User Access | 5% | - Differentiate system privileges from object privileges - Grant privileges on tables and on a view - Distinguish between granting privileges and roles |
| Topic 10: Using Subqueries to Solve Queries | 15% | - Define subqueries - Write single-row and multi-row subqueries - Describe the types of problems that subqueries can solve - List the types of subqueries |
| Topic 11: Using Set Operators | 5% | - Describe the order of precedence when the set operators are used - Describe set operators - Use a set operator to combine multiple queries into a single query |
| Topic 12: Reporting Aggregated Data Using Group Functions | 15% | - Group data by using the GROUP BY clause - Describe the use of group functions - Include or exclude grouped rows by using the HAVING clause - Identify the available group functions |
| Topic 13: Retrieving Data Using the SQL SELECT Statement | 5% | - List the capabilities of SQL SELECT statements - Execute a basic SELECT statement - Differentiate between SQL statements and SQL*Plus commands |
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NEW QUESTION # 128
View the Exhibit and examine the structure of the CUSTOMERS table.
You want to generate a report showing the last names and credit limits of all customers whose last names start with A, B, or C, and credit limit is below 10,000.
Evaluate the following two queries:
SQL> SELECT cust_last_name, cust_credit_limit FROM customers
WHERE (UPPER(cust_last_name) LIKE 'A%' OR
UPPER (cust_last_name) LIKE 'B%' OR UPPER (cust_last_name) LIKE 'C%')
AND cust_credit_limit < 10000;
SQL>SELECT cust_last_name, cust_credit_limit FROM customers
WHERE UPPER (cust_last_name) BETWEEN 'A' AND 'C'
AND cust_credit_limit < 10000;
Which statement is true regarding the execution of the above queries?
Answer: D
NEW QUESTION # 129
Which three statements are true about sequences in a single instance Oracle database? (Choose three.)
Answer: D,E,F
NEW QUESTION # 130
In which three situations does a new transaction always start?
Answer: A,E,F
Explanation:
Substitution variables in Oracle are used to replace a value dynamically during the execution of SQL statements. The behavior of these variables is well-documented:
C . A substitution variable prefixed with & always prompts only once for a value in a session: This is true. In a session, when you use a single ampersand (&), SQL*Plus or SQL Developer will prompt for the value the first time the variable is encountered. The value for this variable will then be reused for the remainder of the session unless it is redefined.
D . A substitution variable can be used with any clause in a SELECT statement: Substitution variables can be placed in any part of a SQL statement, including the SELECT, WHERE, GROUP BY, ORDER BY, etc. They are not limited to any specific clause.
Reference:
Oracle SQL*Plus User's Guide and Reference, which discusses substitution variables.
NEW QUESTION # 131
Examine the description of the EMPLOYEES table:
Which query is valid?
Answer: D
Explanation:
When using the GROUP BY clause, every column in the SELECT clause that is not an aggregate function must be included in the GROUP BY clause:
* A. SELECT dept_id, join_date, SUM(salary) FROM employees GROUP BY dept_id, join_date:
This is a valid query because all non-aggregate columns in the SELECT list (dept_id and join_date) are included in the GROUP BY clause.
Queries B and C are invalid because they attempt to nest aggregate functions, which is not allowed. Query D is invalid because join_date is not included in the GROUP BY clause.
References:
* Oracle Database SQL Language Reference 12c, specifically the section on GROUP BY clause constraints.
NEW QUESTION # 132
You execute this query:
What is the result?
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION # 133
......
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