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| Section | Weight | Objectives |
|---|---|---|
| Manipulating Data | 14% | - Delete rows from a table - Describe each data manipulation language (DML) statement - Update rows in a table - Control transactions - Insert rows into a table |
| Using Conversion Functions and Conditional Expressions | 10% | - Describe implicit and explicit data type conversion - 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 |
| 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 |
| Using Single-Row Functions to Customize Output | 10% | - Manipulate strings with character function in the SELECT and WHERE clauses - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Describe the differences between single-row and multiple-row functions - Manipulate dates with the date functions - Perform arithmetic with date data |
| Working with Oracle Database SQL | 8% | - Create a container database - Describe the Oracle Database architecture - Explain the installation of Oracle Database software - Start up and shut down a database |
| Using Set Operators | 5% | - Use a set operator to combine multiple queries into a single query - Describe set operators - Describe the order of precedence when the set operators are used |
| Using DDL Statements to Create and Manage Tables | 14% | - Categorize the main database objects - Drop, rename, and truncate tables - Create a simple table - Review the table structure - Alter table definitions - Describe the data types that are available for columns |
| Using Subqueries to Solve Queries | 15% | - Define subqueries - Write single-row and multi-row subqueries - List the types of subqueries - Describe the types of problems that subqueries can solve |
| 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 |
| Restricting and Sorting Data | 6% | - Sort the rows that are retrieved by a query - Use ampersand substitution to restrict and sort output at runtime - Use DEFINE and UNDEFINE commands - Limit the rows that are retrieved by a query |
| Displaying Data from Multiple Tables Using Joins | 15% | - View data that does not meet a join condition by using outer joins - Join a table to itself by using a self-join - Cross join tables - Write SELECT statements to access data from more than one table using equijoins and non-equijoins |
| Controlling User Access | 5% | - Differentiate system privileges from object privileges - Grant privileges on tables and on a view - Distinguish between granting privileges and roles |
| Creating Other Schema Objects | 10% | - Create synonyms for database objects - Create, maintain, and use sequences - Create, modify, and retrieve data from a view - Create and maintain indexes |
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NEW QUESTION # 339
Examine the structure of the EMPLOYEES table.
You must display the details of employees who have manager with MANAGER_ID 100, who were hired in the past 6 months and who have salaries greater than 10000.
Which query would retrieve the required result?
Answer: D
NEW QUESTION # 340
Which two statements are true about Data Manipulation Language (DML) statements? (Choose two.)
Answer: C,F
Explanation:
Explanation
References:
http://www.techonthenet.com/sql/and_or.php
NEW QUESTION # 341
Examine this SQL statement:
SELECT cust_id, cus_last_name "Last Name"
FROM customers
WHERE country_id = 10
UNION
SELECT cust_id CUST_NO, cust_last_name
FROM customers
WHERE country_id = 30
Identify three ORDER BY clauses, any one of which can complete the query successfully.
Answer: C,E
Explanation:
In SQL, the ORDER BY clause can refer to columns by their alias defined in the SELECT clause or by their positional number in the SELECT list. It's important to understand that after a UNION, the column names in the ORDER BY clause refer to the first SELECT statement's column names and aliases:
* Option A: ORDER BY 2, 1This is correct because it refers to the second and first columns in the first SELECT clause, which correspond to the aliases "Last Name" and cust_id, respectively.
* Option E: ORDER BY "Last Name"This is correct because "Last Name" is a valid alias defined in the first SELECT clause.
The other options fail for the following reasons:
* Option B: "CUST_NO" is not recognized in the ORDER BY clause because it's not an alias used in the first SELECT statement.
* Option C: Incorrect because 2, cust_id mixes positional reference with a column name that doesn't apply to both SELECT statements consistently.
* Option D: ORDER BY CUST_NO fails because CUST_NO is not an alias in the first SELECT clause.
NEW QUESTION # 342
Which statement is true regarding external tables?
Answer: A
Explanation:
Explanation/Reference:
References:
https://docs.oracle.com/cd/B28359_01/server.111/b28310/tables013.htm
NEW QUESTION # 343
Examine the description of the SALES1 table:
SALES2 is a table with the same description as SALES1,
Some sales data is duplicated In both tables.
You want to display the rows from the SALES1 table which are not present in the SALIES2 table.
Which set operator generates the required output?
Answer: D
NEW QUESTION # 344
......
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