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- Question
A subquery in an SQL SELECT statement:
Options- A. can only be used with two tables.
- B. can always be duplicated by a join.
- C. has a distinct form that cannot be duplicated by a join.
- D. cannot have its results sorted using ORDER BY.
- Correct Answer
- has a distinct form that cannot be duplicated by a join.
- 1. The command to eliminate a table from a database is:
Options- A. REMOVE TABLE CUSTOMER;
- B. DROP TABLE CUSTOMER;
- C. DELETE TABLE CUSTOMER;
- D. UPDATE TABLE CUSTOMER; Discuss
- 2. In an SQL SELECT statement querying a single table, according to the SQL-92 standard the asterisk (*) means that:
Options- A. all columns of the table are to be returned.
- B. all records meeting the full criteria are to be returned.
- C. all records with even partial criteria met are to be returned.
- D. None of the above is correct. Discuss
- 3. A view is which of the following?
Options- A. A virtual table that can be accessed via SQL commands
- B. A virtual table that cannot be accessed via SQL commands
- C. A base table that can be accessed via SQL commands
- D. A base table that cannot be accessed via SQL commands Discuss
- 4. Using ODL, you can define which of the following?
Options- A. Attribute
- B. Structure
- C. Operation
- D. All of the above. Discuss
- 5. ODL supports which of the following types of association relationships?
Options- A. Unary
- B. Unary and Binary
- C. Unary and Binary and Ternary
- D. Unary and Binary and Ternary and higher Discuss
- 6. To define what columns should be displayed in an SQL SELECT statement:
Options- A. use FROM to name the source table(s) and list the columns to be shown after SELECT.
- B. use USING to name the source table(s) and list the columns to be shown after SELECT.
- C. use SELECT to name the source table(s) and list the columns to be shown after USING.
- D. use USING to name the source table(s) and list the columns to be shown after WHERE. Discuss
- 7. SQL query and modification commands make up a(n) ________ .
Options- A. DDL
- B. DML
- C. HTML
- D. XML Discuss
- 8. A subquery in an SQL SELECT statement is enclosed in:
Options- A. braces -- {...}.
- B. CAPITAL LETTERS.
- C. parenthesis -- (...) .
- D. brackets -- [...]. Discuss
- 9. SQL data definition commands make up a(n) ________ .
Options- A. DDL
- B. DML
- C. HTML
- D. XML Discuss
- 10. The Microsoft Access wildcards are ____ and ____ .
Options- A. asterisk (*); percent sign (%)
- B. percent sign (%); underscore (_)
- C. underscore(_); question mark (?)
- D. question mark (?); asterisk (*) Discuss
Introduction to SQL problems
Search Results
Correct Answer: DROP TABLE CUSTOMER;
Correct Answer: all columns of the table are to be returned.
Correct Answer: A virtual table that can be accessed via SQL commands
Correct Answer: All of the above.
Correct Answer: Unary and Binary
Correct Answer: use FROM to name the source table(s) and list the columns to be shown after SELECT.
Correct Answer: DML
Correct Answer: parenthesis -- (...) .
Correct Answer: DDL
Correct Answer: question mark (?); asterisk (*)
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