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- Question
Data integrity constraints are used to
Options- A. Ensure that duplicate records are not entered into the table
- B. Prevent users from changing the values stored in the table
- C. Control who is allowed access to the data
- D. Improve the quality of data entered for a specific property like table column
- Correct Answer
- Improve the quality of data entered for a specific property like table column
ExplanationIntegrity constraints are used to ensure accuracy and consistency of data in a relational database. Data integrity is handled in a relational database through the concept of referential integrity. Many types of integrity constraints play a role in referential integrity (RI).
Hence, Data integrity constraints are used to Improve the quality of data entered for a specific property i.e, table column.
- 1. The SQL keyword BETWEEN is used:
Options- A. for ranges
- B. as a wildcard
- C. to limit the columns displayed
- D. All the above Discuss
- 2. A subquery in an sql select statement. Discuss
- 3. Can?t update primary table?s primary key if row being modified has related rows in secondary table once referential integrity is enforced
Options- A. TRUE
- B. FALSE Discuss
- 4. Breaking of relationships is allowed once referential integrity on a database is enforced
Options- A. TRUE
- B. FALSE Discuss
- 5. STUFF and REPLACE are used to replace characters in a string
Options- A. TRUE
- B. FALSE Discuss
- 6. What is an Extension of Entity Type? Discuss
- 7. Which packages contain the JDBC classes?
Options- A. java.sql
- B. java.sl
- C. java.jd
- D. java.jdbc Discuss
- 8. A statistical method for identifying which factors may influence specific variables of a product or process under development or in production is called
Options- A. cost benefit analysis.
- B. sensitivity analysis.
- C. cost of quality analysis.
- D. design of experiments. Discuss
- 9. Who Creates The Project Charter?
Options- A. Sponser
- B. Stake holder
- C. Customer
- D. None Discuss
- 10. A project in PMP can be defined as a :
Options- A. Permanent endeavor that produces repetitive outputs
- B. Temporary endeavor undertaken to create a unique product, service, or result
- C. Permanent endeavor undertaken to create a unique product, service, or result
- D. Temporary endeavor that produces repetitive outputs Discuss
Oracle Certification problems
Search Results
Correct Answer: for ranges
Explanation:
In SQL, BETWEEN Keyword is used for ranges like Number Ranges, Date Ranges, etc...
Correct Answer: A Subquery or Inner query or a Nested query is a query within another SQL query and embedded within the WHERE clause Subqueries are most frequently used with the SELECT statement The basic syntax is as follows:: SELECT column_name [, column_name ] FROM table1 [, table2 ] WHERE column_name OPERATOR (SELECT column_name [, column_name ] FROM table1 [, table2 ] [WHERE]) A subquery is used to return data that will be used in the main query as a condition to further restrict the data to be retrieved Subqueries can be used with the SELECT, INSERT, UPDATE, and DELETE statements along with the operators like =, <, >, >=, <=, IN, BETWEEN, etc There are a few rules that subqueries must follow ? 1 Subqueries must be enclosed within parentheses 2 A subquery can have only one column in the SELECT clause, unless multiple columns are in the main query for the subquery to compare its selected columns 3 An ORDER BY command cannot be used in a subquery, although the main query can use an ORDER BY The GROUP BY command can be used to perform the same function as the ORDER BY in a subquery 4 Subqueries that return more than one row can only be used with multiple value operators such as the IN operator 5 The SELECT list cannot include any references to values that evaluate to a BLOB, ARRAY, CLOB, or NCLOB 6 A subquery cannot be immediately enclosed in a set function 7 The BETWEEN operator cannot be used with a subquery However, the BETWEEN operator can be used within the subquery
Correct Answer: TRUE
Correct Answer: FALSE
Explanation:
Breaking of relationships is prevented once referential integrity on a database is enforced
Correct Answer: TRUE
Explanation:
They both are used to replace characters in a string
Correct Answer: The collections of entities of a particular Entity Type are grouped together into an entity set
Correct Answer: java.sql
Explanation:
The Java packages which contain JDBC classes and interfaces is Java.SQL.
Correct Answer: design of experiments.
Correct Answer: None
Explanation:
The project initiator or sponsor should be at a level that is appropriate to funding the project. They will either create the project charter or delegate that duty to the project manager.
Projects are authorized by someone external to the project such as a sponsor, PMO or portfolio steering committee.
Correct Answer: Temporary endeavor undertaken to create a unique product, service, or result
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