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| Section | Weight | Objectives |
|---|---|---|
| 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 DDL Statements to Create and Manage Tables | 14% | - Alter table definitions - Review the table structure - Describe the data types that are available for columns - Drop, rename, and truncate tables - Create a simple table - Categorize the main database objects |
| Manipulating Data | 14% | - Describe each data manipulation language (DML) statement - Delete rows from a table - Update rows in a table - Control transactions - Insert rows into a table |
| 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 |
| Restricting and Sorting Data | 6% | - Use DEFINE and UNDEFINE commands - Limit the rows that are retrieved by a query - Use ampersand substitution to restrict and sort output at runtime - Sort the rows that are retrieved by a query |
| Working with Oracle Database SQL | 8% | - Start up and shut down a database - Create a container database - Describe the Oracle Database architecture - Explain the installation of Oracle Database software |
| Controlling User Access | 5% | - Grant privileges on tables and on a view - Distinguish between granting privileges and roles - Differentiate system privileges from object privileges |
| Using Single-Row Functions to Customize Output | 10% | - 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 - Manipulate dates with the date functions |
| 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 |
| Reporting Aggregated Data Using Group Functions | 15% | - Include or exclude grouped rows by using the HAVING clause - Describe the use of group functions - Group data by using the GROUP BY clause - Identify the available group functions |
| Creating Other Schema Objects | 10% | - Create and maintain indexes - Create, maintain, and use sequences - Create, modify, and retrieve data from a view - Create synonyms for database objects |
| Displaying Data from Multiple Tables Using Joins | 15% | - Write SELECT statements to access data from more than one table using equijoins and non-equijoins - 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 |
| Using Conversion Functions and Conditional Expressions | 10% | - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions - Use conditional IF THEN ELSE logic in a SELECT statement - Describe implicit and explicit data type conversion - Apply the NVL, NULLIF, and COALESCE functions to data |
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NEW QUESTION # 420
The user SCOTT who is the owner of ORDERS and ORDER_ITEMS tables issues this GRANT command:
GRANT ALL
ON orders, order_items
TO PUBLIC;
What must be done to fix the statement?
Answer: B
Explanation:
Explanation
http://docs.oracle.com/javadb/10.8.3.0/ref/rrefsqljgrant.html
NEW QUESTION # 421
Which two statements are true about Entity Relationships?
Answer: C
Explanation:
A relationship in an Entity-Relationship (ER) model can indeed be mandatory for both entities, meaning that an instance of one entity must relate to one and only one instance of another entity, and vice versa. This is commonly seen in a one-to-one relationship where both sides are mandatory.
Option B is incorrect; a one-to-one relationship does not have to be self-referencing. Self-referencing (or recursive) relationships occur when an entity has a relationship with itself.
Option C is incorrect; a many-to-many relationship typically requires a join table or associative entity with foreign keys that reference the primary keys of the two entities it connects.
Option D is incorrect; in the case of a self-referencing relationship, you may need to use aliases to specify the table more than once to differentiate between the self-referenced columns.
Option E is incorrect because a one-to-many relationship in one direction does not equate to a one-to-one relationship in the opposite direction.
References:
* Entity-Relationship Model Concepts: ER Model
NEW QUESTION # 422
Which three are true about privileges and roles?
Answer: A,D,G
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/B19306_01/network.102/b14266/authoriz.htm#i1010570
NEW QUESTION # 423
View the Exhibit and examine the structure of the PRODUCT table.
Which two tasks would require subqueries? (Choose two.)
Answer: B,C
NEW QUESTION # 424
Which three statements are true about an ORDER BY clause?
Answer: B,D,E
Explanation:
In Oracle Database 12c, the behavior of the ORDER BY clause is guided by several rules:
* Option B: An ORDER BY clause can perform a binary sort.
* A binary sort is the default sorting mechanism in Oracle Database, which is based on the binary representation of the data.
* Option C: An ORDER BY clause can perform a linguistic sort.
* Oracle supports linguistic sorting through the use of the NLS_SORT parameter, which can be set to various linguistic and cultural norms.
* Option D: By default, an ORDER BY clause sorts rows in ascending order.
* If no ASC or DESC keyword is specified, Oracle will sort the results in ascending order by
* default.
Options A and E are incorrect:
* Option A is not universally true; the position of NULL values in the sort order can be controlled by settings or specific SQL syntax (NULLS FIRST or NULLS LAST).
* Option E is incorrect as the HAVING clause filters groups after data has been grouped by the GROUP BY clause and cannot be logically placed before ORDER BY in processing order.
NEW QUESTION # 425
......
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