多项选择题Which are DML statements? ()

A.COMMIT
B.MERGE
C.UPDATE
D.DELETE
E.CREATE
F.DROP...


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1.单项选择题

Click the Exhibit button and examine the data in the EMPLOYEES table.
Examine the subquery:
SELECT last_name
FROM employees
WHERE salary IN (SELECT MAX(salary)
FROM employees
GROUP BY department_id);
Which statement is true?()

A.The SELECT statement is syntactically accurate.
B.The SELECT statement does not work because there is no HAVING clause.
C.The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list.
D.The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.

2.多项选择题Which two are character manipulation functions? ()

A.TRIM
B.REPLACE
C.TRUNC
D.TO_DATE
E.MOD
F.CASE

3.多项选择题Which two are attributes of iSQL*Plus? ()

A.iSQL*Plus commands cannot be abbreviated.
B.iSQL*Plus commands are accessed from a browser.
C.iSQL*Plus commands are used to manipulate data in tables.
D.iSQL*Plus commands manipulate table definitions in the database.
E.iSQL*Plus is the Oracle proprietary interface for executing SQL statements.

4.单项选择题In which case would you use a FULL OUTER JOIN?()

A.Both tables have NULL values.
B.You want all unmatched data from one table.
C.You want all matched data from both tables.
D.You want all unmatched data from both tables.
E.One of the tables has more data than the other.
F.You want all matched and unmatched data from only one table.

5.多项选择题Which three statements about subqueries are true? ()

A.Asinglerowsubquerycanretrieveonlyonecolumnandonerow.
B.Asinglerowsubquerycanretrieveonlyonerowbutmanycolumns.
C.Amultiplerowsubquerycanretrievemultiplerowsandmultiplecolumns.
D.Amultiplerowsubquerycanbecomparedusingthe";>;";operator.
E.AsinglerowsubquerycanusetheINoperator.
F.Amultiplerowsubquerycanusethe";=";operator.

6.单项选择题Which view should a user query to display the columns associated with the constraints on a table owned by the user?()

A.USER_CONSTRAINTS
B.USER_OBJECTS
C.ALL_CONSTRAINTS
D.USER_CONS_COLUMNS
E.USER_COLUMNS

7.多项选择题

Evaluate the SQL statement
DROP TABLE DEPT;
Which four statements are true of the SQL statement? ()

A.You cannot roll back this statement.
B.All pending transactions are committed.
C.All views based on the DEPT table are deleted.
D.All indexes based on the DEPT table are dropped.
E.All data in the table is deleted, and the table structure is also deleted.
F.All data in the table is deleted, but the structure of the table is retained.
G.All synonyms based on the DEPT table are deleted.

8.单项选择题Which SQL statement generates the alias Annual Salary for the calculated column SALARY*12?()

A.SELECT ename, salary*12 'Annual Salary' FROM employees;
B.SELECT ename, salary*12 "Annual Salary" FROM employees;
C.SELECT ename, salary*12 AS Annual Salary FROM employees;
D.SELECT ename, salary*12 AS INITCAP("ANNUAL SALARY") FROM employees

9.单项选择题Which clause should you use to exclude group results?()

A.WHERE
B.HAVING
C.RESTRICT
D.GROUP BY
E.ORDER BY

10.多项选择题Which two statements are true about constraints? ()

A.The UNIQUE constraint does not permit a null value for the column.
B.A UNIQUE index gets created for columns with PRIMARY KEY and UNIQUE constraints.
C.The PRIMARY KEY and FOREIGN KEY constraints create a UNIQUE index.
D.The NOT NULL constraint ensures that null values are not permitted for the column.

最新试题

Examine the structure of the STUDENTS table:STUDENT_ID NUMBER NOT NULL, Primary KeySTUDENT_NAME VARCHAR2(30)COURSE_ID VARCHAR2(10) NOT NULLMARKS NUMBERSTART_DATE DATEFINISH_DATE DATEYou need to create a report of the 10 students who achieved the highest ranking in the course INT SQL and who completed the course in the year 1999.Which SQL statement accomplishes this task? ()

题型:单项选择题

For which action can you use the TO_DATE function? ()

题型:单项选择题

Which statement correctly describes SQL and /SQL*Plus? ()

题型:单项选择题

A SELECT statement can be used to perform these three functions:1. Choose rows from a table.2. Choose columns from a table3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities? ()

题型:单项选择题

Evaluate the SQL statement: TRUNCATE TABLE DEPT; Which three are true about the SQL statement? ()

题型:多项选择题

What is true regarding subqueries?()

题型:单项选择题

The user Alice wants to grant all users query privileges on her DEPT table. Which SQL statement accomplishes this? ()

题型:单项选择题

Which is an iSQL*Plus command? ()

题型:单项选择题

Examine these statements:CREATE ROLE registrarGRANT UPDATE ON dtudent_grades TO registrar;GRANT registrar to user1, user2, user3;What does this set of SQL statements do? ()

题型:单项选择题

Which one is a system privilege? ()

题型:单项选择题