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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: 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 |
| Topic 2: Manipulating Data | 14% | - Update rows in a table - Describe each data manipulation language (DML) statement - Control transactions - Insert rows into a table - Delete rows from a table |
| Topic 3: Working with Oracle Database SQL | 8% | - Explain the installation of Oracle Database software - Start up and shut down a database - Describe the Oracle Database architecture - Create a container database |
| Topic 4: 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 - Manipulate strings with character function in the SELECT and WHERE clauses - Manipulate dates with the date functions - Perform arithmetic with date data |
| Topic 5: 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 |
| Topic 6: Using Subqueries to Solve Queries | 15% | - Write single-row and multi-row subqueries - Describe the types of problems that subqueries can solve - Define subqueries - List the types of subqueries |
| Topic 7: 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 |
| Topic 8: Controlling User Access | 5% | - Distinguish between granting privileges and roles - Grant privileges on tables and on a view - Differentiate system privileges from object privileges |
| Topic 9: Creating Other Schema Objects | 10% | - Create, maintain, and use sequences - Create, modify, and retrieve data from a view - Create and maintain indexes - Create synonyms for database objects |
| Topic 10: Using DDL Statements to Create and Manage Tables | 14% | - Describe the data types that are available for columns - Categorize the main database objects - Drop, rename, and truncate tables - Create a simple table - Review the table structure - Alter table definitions |
| Topic 11: Using Conversion Functions and Conditional Expressions | 10% | - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions - Describe implicit and explicit data type conversion - Use conditional IF THEN ELSE logic in a SELECT statement - Apply the NVL, NULLIF, and COALESCE functions to data |
| Topic 12: Restricting and Sorting Data | 6% | - 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 - Use DEFINE and UNDEFINE commands |
| 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 # 339
The ORDERS table has a primary key constraint on the ORDER_ID column.
The ORDER_ITEMS table has a foreign key constraint on the ORDER_ID column, referencing the primary key of the ORDERS table.
The constraint is defined with on DELETE CASCADE.
There are rows in the ORDERS table with an ORDER_TOTAL less than 1000.
Which three DELETE statements execute successfully?
Answer: A,D,E
Explanation:
In Oracle 12c SQL, the DELETE statement is used to remove rows from a table based on a condition. Given the constraints and the information provided, let's evaluate the options:
A . DELETE FROM orders WHERE order_total<1000;: This statement is correctly formatted and will delete rows from the ORDERS table where ORDER_TOTAL is less than 1000. If there is a DELETE CASCADE constraint, corresponding rows in the ORDER_ITEMS table will also be deleted.
B . DELETE * FROM orders WHERE order_total<1000;: This syntax is incorrect. The asterisk (*) is not used in the DELETE statement.
C . DELETE orders WHERE order_total<1000;: This statement is also correctly formatted and is a shorthand version of the DELETE statement without the FROM clause.
D . DELETE FROM orders;: This statement will delete all rows from the ORDERS table, and with DELETE CASCADE, it will also delete all related rows in the ORDER_ITEMS table.
E . DELETE order_id FROM orders WHERE order_total<1000;: This syntax is incorrect because you cannot specify a column after the DELETE keyword.
Reference:
Oracle Database SQL Language Reference 12c Release 1 (12.1), DELETE Statement
NEW QUESTION # 340
View the Exhibit and examine the structure of the CUSTOMERStable.
CUSTOMER_VUis a view based on CUSTOMERS_BR1 table which has the same structure as CUSTOMERStable.
CUSTOMERSneed to be updated to reflect the latest information about the customers.
What is the error in the following MERGEstatement?
Answer: D
Explanation:
Explanation/Reference:
NEW QUESTION # 341
Examine the command:
What does ON DELETE CASCADE imply?
Answer: D
NEW QUESTION # 342
Examine this SQL statement:
Identify three order by clauses, any one of which can complete the query successfully.
Answer: C,D,E
NEW QUESTION # 343
Examine this partial command:
CREATE TABLE cust(
cust_id NUMBER(2),
credit_limit NUMBER(10)
ORGANIZATION EXTERNAL
Which two clauses are required for this command to execute successfully?
Answer: A,E
Explanation:
When creating an external table, which allows you to access data in a flat file as though it is a table inside the database, certain clauses are required:
* A. the ACCESS PARAMETERS clause: This clause specifies the parameters required by the access driver to read the data files.
* D. the LOCATION clause: This clause specifies the location of the data files that make up the external table.
References:
* Oracle Database SQL Language Reference 12c, particularly the sections detailing the creation and management of external tables.
NEW QUESTION # 344
......
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