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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: 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 - Apply the NVL, NULLIF, and COALESCE functions to data - Describe implicit and explicit data type conversion |
| Topic 2: Manipulating Data | 14% | - Insert rows into a table - Delete rows from a table - Update rows in a table - Describe each data manipulation language (DML) statement - Control transactions |
| Topic 3: 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 |
| Topic 4: 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 |
| Topic 5: Using Single-Row Functions to Customize Output | 10% | - Manipulate dates with the date functions - Perform arithmetic with date data - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Manipulate strings with character function in the SELECT and WHERE clauses - Describe the differences between single-row and multiple-row functions |
| Topic 6: Displaying Data from Multiple Tables Using Joins | 15% | - Join a table to itself by using a self-join - 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 |
| Topic 7: Restricting and Sorting Data | 6% | - Use DEFINE and UNDEFINE commands - Use ampersand substitution to restrict and sort output at runtime - Limit the rows that are retrieved by a query - Sort the rows that are retrieved by a query |
| Topic 8: Controlling User Access | 5% | - Distinguish between granting privileges and roles - Differentiate system privileges from object privileges - Grant privileges on tables and on a view |
| Topic 9: Using Set Operators | 5% | - Use a set operator to combine multiple queries into a single query - Describe the order of precedence when the set operators are used - Describe set operators |
| Topic 10: Using DDL Statements to Create and Manage Tables | 14% | - Alter table definitions - Categorize the main database objects - Drop, rename, and truncate tables - Create a simple table - Describe the data types that are available for columns - Review the table structure |
| Topic 11: Working with Oracle Database SQL | 8% | - Describe the Oracle Database architecture - Create a container database - Start up and shut down a database - Explain the installation of Oracle Database software |
| Topic 12: Using Subqueries to Solve Queries | 15% | - Define subqueries - Describe the types of problems that subqueries can solve - Write single-row and multi-row subqueries - List the types of subqueries |
| Topic 13: Reporting Aggregated Data Using Group Functions | 15% | - Group data by using the GROUP BY clause - Describe the use of group functions - Identify the available group functions - Include or exclude grouped rows by using the HAVING clause |
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NEW QUESTION # 67
Examine the data in the EMPLOYEES table:
Which statement will compute the total annual compensation for each employee?
Answer: B
Explanation:
To calculate the total annual compensation, you need to sum the annual salary with the annual commission. The annual commission is the monthly commission percentage times the monthly salary times 12 (months). The NVL function is used to replace NULL with 0 for commission percentage when calculating the commission.
A: This statement is incorrect because it does not handle NULL values for 'monthly_commission_pct', which will result in NULL for the entire expression if 'monthly_commission_pct' is NULL.
B: This statement is syntactically incorrect because it lacks commas and proper parentheses to separate the column name 'last_ name' from the calculation.
C: This is the correct statement as it uses NVL to replace NULL with 0 and calculates the total annual compensation correctly.
D: This statement is incorrect because, like in option A, it does not handle NULL values in 'monthly_commission_pct', resulting in NULL if 'monthly_commission_pct' is NULL.
NEW QUESTION # 68
When does a transaction complete? (Choose all that apply.)
Answer: C,D,E
NEW QUESTION # 69
View the Exhibit and examine, the description for the SALES and CHANNELS tables.
(Choose the best answer.)
You issued this SQL statement:
INSERT INTO SALES VALUES (23, 2300, SYSDATE,
(SELECT CAHNNEL_ID
FROM CHANNELS
WHERE CHANNEL_DESC='DIRECT SALES'), 12, 1, 500);
Which statement is true regarding the result?
Answer: C
NEW QUESTION # 70
View the Exhibit and examine the details of the ORDER_ITEMS table.
Evaluate the following SQL statements:
Statement 1:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items;
Statement 2:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items
GROUP BY order_id;
Which statements are true regarding the output of these SQL statements? (Choose all that apply.)
Answer: A,D,E
NEW QUESTION # 71
Examine the structure of the SHIPMENTS table:
You want to generate a report that displays the PO_ID and the penalty amount to be paid if the SHIPMENT_DATE is later than one month from the PO_DATE. The penalty is $20 per day.
Evaluate the following two queries:
Which statement is true regarding the above commands?
Answer: E
Explanation:
The MONTHS_BETWEEN(date 1, date 2) function returns the number of months between two dates:
months_between('01-FEB-2008','01-JAN-2008') = 1
The DECODE Function
Although its name sounds mysterious, this function is straightforward. The DECODE function implements if then-else conditional logic by testing its first two terms for equality and returns the third if they are equal and optionally returns another term if they are not. DECODE Function Facilitates conditional inquiries by doing the work of a CASE expression or an IF-THENELSE statement:
DECODE(col|expression, search1, result1
[, search2, result2,...,]
[, default])
DECODE Function
The DECODE function decodes an expression in a way similar to the IF-THEN-ELSE logic that is used in various languages. The DECODE function decodes expression after comparing it to each search value. If the expression is the same as search, result is returned.
If the default value is omitted, a null value is returned where a search value does not match any of the result values.
NEW QUESTION # 72
......
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