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The validity life period of the certification:
After passing the exam ORACLE 1Z0-071 and winning the certificate. Remember that the certificate will be valid for 03 years. After that, you have to renew it. There is a process of maintaining the certification, you have to follow that process to maintain it. So after getting certification, try to keep in touch with the professional knowledge related to the 1Z0-071 exam otherwise you have to take the exam to be recertified.
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Exam Topics
The Oracle 1Z0-071 exam checks the candidates’ expertise in a wide range of technical areas. The description of each topic included in this certification test is outlined below:
- Using SET Operators: To tackle the question from this sector, the students need to have expertise in matching the SELECT statements; utilizing the ORDER BY clause within set operations; utilizing the INTERSECT operator; utilizing the MINUS operator; utilizing the UNION as well as UNION ALL operators.
- Reporting Aggregated Data with the Help of Group Functions: This includes such technical abilities as restricting group results; creating data groups; utilizing group functions.
- Managing Data in Different Time Zones: The topic requires that the applicants possess competency in operating with CURRENT_TIMESTAMP, LOCALTIMESTAMP, and CURRENT_DATE, as well as dealing with INTERVAL data types.
- Retrieving Data with the Help of the SQL SELECT Statement: This domain includes the following technical skills: utilizing column aliases; utilizing the SQL SELECT statement; utilizing literal character strings, replacement quote operator, the DISTINCT keyword, concatenation operator; utilizing arithmetic expressions as well as NULL values within the SELECT statement.
- Using Single-Row Functions to Configure Output: The topic encompasses one’s skills in manipulating strings with the character functions within the SQL SELECT as well as WHERE clauses; implementing arithmetic using date data; manipulating numbers with MOD, TRUNC, and ROUND functions; manipulating dates using the date function.
- Using Subqueries to Solve Queries: The skills covered in this topic include utilizing single row subqueries; upgrading and deleting rows with the help of correlated subqueries; utilizing multiple-row subqueries.
- Using Conversion Functions & Conditional Expressions: In the framework of this domain, the learners should prove that they are able to apply the COALESCE, NULLIF, NVL functions to data; understand implicit as well as explicit data type conversion; utilize the TO_NUMBER, TO_DATE, and TO_CHAR conversion functions; nest multiple functions.
- Showcasing Data from Multiple Tables: In the framework of this area, the examinees need to prove their proficiency in utilizing self-joins; utilizing different joins types; utilizing non equijoins; utilizing OUTER joins; describing and utilizing Cartesian products.
- Using DDL to Handle Tables and Their Relationships: The subject requires the candidates’ skills in explaining and operating with tables; explaining and operating with data types and columns; creating tables; dropping columns as well as setting column UNUSED; truncating tables; creating and utilizing temporary tables; creating and utilizing external tables; handling constraints.
- Managing Tables with the Help of DML Statements: Here, the individuals should know how to manage database transactions; control transactions; implement update, delete, and insert, operations; execute multi-table inserts; execute merge statements.
- Managing Indexes Synonyms & Sequences: This domain focuses on such technical skills as handling indexes; handling sequences as well as handling synonyms.
- Understanding Relational Database Concepts: Within this objective, the test takers should demonstrate that they are capable of describing both physical and theoretical relation database aspects; associating the clauses within SQL Select Statement with the ERD components; describing the link between SQL and a database.
- Sorting & Restricting Data: Here, the applicants must be conversant with implementing precedence rules for the operators within an expression; restricting Rows Returned within the SQL Statement; utilizing Substitution Variables; utilizing VERIFY as well as DEFINE commands.
- Managing Views: This area comes with the abilities, such as differentiating object privileges from system privileges; granting privileges on tables; distinguishing between granting roles and privileges.
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Oracle 1z0-071 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Subqueries to Solve Queries | - Correlated subqueries for update/delete - Single-row and multi-row subqueries | |
| Topic 2: Using Data Dictionary Views | - Retrieve metadata and object information | |
| Topic 3: Retrieving Data Using SQL SELECT Statement | 20% | - SELECT statement syntax and usage - Arithmetic operations and NULL handling - Column aliases, concatenation, literals and DISTINCT |
| Topic 4: Working with Time Zones and Date/Time Data | - TIMESTAMP, INTERVAL data types - Time zone conversion functions | |
| Topic 5: Aggregating Data Using Group Functions | 10% | - Handling NULLs in group functions - GROUP BY and HAVING clauses - SUM, AVG, COUNT, MAX, MIN functions |
| Topic 6: Manipulating Data and Managing Transactions | - INSERT, UPDATE, DELETE, MERGE statements - Multi-table inserts - Transaction control: COMMIT, ROLLBACK, SAVEPOINT | |
| Topic 7: Relational Database Concepts | 10% | - ERD and SQL statement mapping - Theoretical and physical aspects of relational databases - Relationship between database and SQL |
| Topic 8: Controlling User Access | - Roles, granting and revoking privileges - System and object privileges | |
| Topic 9: Displaying Data from Multiple Tables | 15% | - Self-joins and outer joins - Cartesian products - Equijoins and non-equijoins |
| Topic 10: Using Single-Row Functions to Customize Output | 20% | - Nested functions usage - Character, number, and date functions |
| Topic 11: Using SET Operators | - UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations | |
| Topic 12: Restricting and Sorting Data | 15% | - WHERE clause and filtering conditions - Operator precedence - Substitution variables, DEFINE and VERIFY commands - ORDER BY clause and sorting rules |
| Topic 13: Managing Indexes, Synonyms and Sequences | - Create and use synonyms - Create and maintain indexes - Create and use sequences | |
| Topic 14: Conversion Functions and Conditional Expressions | 10% | - TO_CHAR, TO_NUMBER, TO_DATE functions - Implicit and explicit data type conversion - NVL, NULLIF, COALESCE and CASE expressions |
| Topic 15: Managing Views | - Create, modify and drop views - Updatable and read-only views | |
| Topic 16: Managing Tables and Constraints | - Data types, creating/altering/dropping tables - Constraints: primary key, foreign key, unique, check, not null - Temporary and external tables |
Oracle Database SQL Sample Questions:
Which three statements are true reading subquenes?
- A. A subquery can have more than one main query
- B. The subquery and main query can retrieve data from different tables.
- C. Only one column or expression can be compared between the subquery and main query.
- D. A Main query can have many subqueries.
- E. The subquery and main query must retrieve date from the same table.
- F. Multiple columns or expressions can be compared between the subquery and main query.
Correct Answer: B,D,F 🗳️
Which two statements are true regarding views? (Choose two.)
- A. A subquery used in a complex view definition cannot contain group functions or joins.
- B. The WITH CHECK OPTION constraint can be used in a view definition to restrict the columns displayed through the view.
- C. The OR REPLACE option is used to change the definition of an existing view without dropping and re- creating it.
- D. Rows cannot be deleted through a view if the view definition contains the DISTINCT keyword.
- E. A simple view in which column aliases have been used cannot be updated.
- F. Rows added through a view are deleted from the table automatically when the view is dropped.
Correct Answer: C,D 🗳️
Which two statements are true? (Choose two.)
- A. DICTIONARY is a view that contains the names of all the data dictionary views that the user can access.
- B. The user SYSTEM owns all the base tables and user-accessible views of the data dictionary.
- C. The USER_SYNONYMS view can provide information about private synonyms.
- D. All the dynamic performance views prefixed with v$ are accessible to all the database users.
- E. The USER_OBJECTS view can provide information about the tables and views created by the user who queries the view.
Correct Answer: C,E 🗳️
Which two statements are true regarding the COUNT function? (Choose two.)
- A. The COUNT function can be used only for CHAR, VARCHAR2 and NUMBER data types
- B. COUNT(DISTINCT inv_amt) returns the number of rows excluding rows containing duplicates and NULL values in the INV_AMT column
- C. A SELECT statement using COUNT function with a DISTINCT keyword cannot have a WHERE clause
- D. COUNT(cust_id) returns the number of rows including rows with duplicate customer IDs and NULL value in the CUST_ID column
- E. COUNT(*) returns the number of rows including duplicate rows and rows containing NULL value in any of the columns
Correct Answer: B,E 🗳️
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View the Exhibit and examine the structure of ORDER_ITEMS and ORDERS tables.
You need to remove from the ORDER_ITEMS table those rows that have an order status of 0 or
1 in the ORDERS table.
Which two DELETE statements are valid (Choose two.)
- A. DELETE
FROM order_items
WHERE order_id IN (SELECT order_id
FROM orders
WHERE orders_status in (0,1)); - B. DELETE
FROM (SELECT * FROM order_items I,orders o
WHERE i.order_id = o.order_id AND order_status IN (0,1)); - C. DELETE
* FROM order_items
WHERE order_id IN (SELECT order_id)
FROM orders
WHERE order_status IN (0,1)); - D. DELETE FROM order_items i
WHERE order_id = (SELECT order_id FROM orders o
WHERE i.order_id = o.order_id AND order_status IN (0,1));
Correct Answer: A,B 🗳️
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