SQL for Database Construction Questions and Answers
SQL (Structured Query Language) forms the backbone of database construction and management. It is a core topic in programming questions and answers for placement and certification exams like those from Accenture, IBM, and TCS. SQL allows users to create, manipulate, and query databases using commands like CREATE, SELECT, and JOIN. Understanding normalization, indexing, and schema design ensures efficient data handling. Students preparing for SQL programming interview questions with answers can boost their database management skills and perform well in both academic and corporate assessments.
SQL for Database Construction
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19 questions
11. When using the SQL INSERT statement:
- rows can be modified according to criteria only.
- rows cannot be copied in mass from one table to another only.
- rows can be inserted into a table only one at a time only.
- rows can either be inserted into a table one at a time or in groups.
12. What is not an advantage of stored procedures?
- Greater security
- SQL can be optimized
- Code sharing
- Increased network traffic
13. A reason for using an SQL view to hide columns is:
- to simplify a result only.
- to prevent the display of sensitive data only.
- to accomplish both of the above.
- None of the above are reasons for using an SQL view.
14. Which of the following is an SQL trigger supported by Oracle?
- BEFORE
- INSTEAD OF
- AFTER
- All of the above
15. The SQL ALTER statement can be used to:
- change the table structure.
- change the table data.
- add rows to the table.
- delete rows from the table.
16. What SQL structure is used to limit column values of a table?
- The LIMIT constraint
- The CHECK constraint
- The VALUE constraint
- None of the above is correct.
17. Which is NOT one of the most common types of SQL CHECK constraints?
- System date
- Range checks
- Lists of values
- Comparing one column value to another within the same table
18. What is an advantage of placing computations in SQL views?
- To save users from having to write an expression.
- To ensure that the results are consistent.
- To accomplish both of the above.
- None of the above is correct - computations cannot be placed in a view.
19. Views constructed from SQL SELECT statements that conform to the SQL-92 standard may not contain:
- GROUP BY.
- WHERE.
- ORDER BY.
- FROM.