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| Section | Weight | Objectives |
|---|---|---|
| Using Single-Row Functions to Customize Output | 20% | - Nested functions usage - Character, number, and date functions |
| Managing Indexes, Synonyms and Sequences | - Create and maintain indexes - Create and use synonyms - Create and use sequences | |
| Displaying Data from Multiple Tables | 15% | - Self-joins and outer joins - Equijoins and non-equijoins - Cartesian products |
| Manipulating Data and Managing Transactions | - INSERT, UPDATE, DELETE, MERGE statements - Multi-table inserts - Transaction control: COMMIT, ROLLBACK, SAVEPOINT | |
| Working with Time Zones and Date/Time Data | - TIMESTAMP, INTERVAL data types - Time zone conversion functions | |
| Relational Database Concepts | 10% | - Relationship between database and SQL - ERD and SQL statement mapping - Theoretical and physical aspects of relational databases |
| Using SET Operators | - Ordering results with set operations - UNION, UNION ALL, INTERSECT, MINUS operators | |
| Managing Views | - Create, modify and drop views - Updatable and read-only views | |
| Conversion Functions and Conditional Expressions | 10% | - NVL, NULLIF, COALESCE and CASE expressions - TO_CHAR, TO_NUMBER, TO_DATE functions - Implicit and explicit data type conversion |
| Retrieving Data Using SQL SELECT Statement | 20% | - SELECT statement syntax and usage - Arithmetic operations and NULL handling - Column aliases, concatenation, literals and DISTINCT |
| Restricting and Sorting Data | 15% | - Operator precedence - ORDER BY clause and sorting rules - Substitution variables, DEFINE and VERIFY commands - WHERE clause and filtering conditions |
| Using Data Dictionary Views | - Retrieve metadata and object information | |
| Controlling User Access | - Roles, granting and revoking privileges - System and object privileges | |
| Managing Tables and Constraints | - Data types, creating/altering/dropping tables - Constraints: primary key, foreign key, unique, check, not null - Temporary and external tables | |
| Using Subqueries to Solve Queries | - Correlated subqueries for update/delete - Single-row and multi-row subqueries | |
| Aggregating Data Using Group Functions | 10% | - SUM, AVG, COUNT, MAX, MIN functions - GROUP BY and HAVING clauses - Handling NULLs in group functions |
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NEW QUESTION # 109
Which statement is true regarding sub queries?
Answer: D
Explanation:
Using the ANY Operator in Multiple-Row Subqueries The ANY operator (and its synonym, the SOME operator) compares a value to each value returned by a subquery.
<ANY means less than the maximum.
>ANY means more than the minimum.
=ANY is equivalent to IN
Using the ALL Operator in Multiple-Row Subqueries The ALL operator compares a value to every value returned by a subquery.
>ALL means more than the maximum and <ALL means less than the minimum. The NOT operator can be used with IN, ANY, and ALL operators.
NEW QUESTION # 110
Examine the structure of the MEMBERS table:
Examine the SQL statement:
SQL > SELECT city, last_name LNAME FROM MEMBERS ORDER BY 1, LNAME DESC; What would be the result execution? (Choose the best answer.)
Answer: A
NEW QUESTION # 111
Which three are true about the MERGEstatement? (Choose three.)
Answer: A,C,E
Explanation:
Explanation/Reference: https://www.oracletutorial.com/oracle-basics/oracle-merge/
NEW QUESTION # 112
Which two are true about self joins?
Answer: D,E
NEW QUESTION # 113
Which two tasks can be performed by using Oracle SQL statements?
Answer: B,D
Explanation:
References:
http://www.techonthenet.com/oracle/password.php
https://docs.oracle.com/cd/B28359_01/server.111/b28324/tdpii_distdbs.htm
NEW QUESTION # 114
......
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