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A table was created using the following DDL: CREATE TABLE employee (id SMALLINT NOT NULL, name VARCHAR(9), dept SMALLINT CHECK (dept BETWEEN 10 AND 100), job CHAR(10) CHECK (job IN ('Sales','Mgr','Clerk')), hiredate DATE, salary DECIMAL(7,2), comm DECIMAL(7,2), PRIMARY KEY (id), CONSTRAINT yearsal CHECK (YEAR(hiredate) > 2004 OR salary > 80500) ); Which of the following INSERT statements will fail?（）
- A、INSERT INTO employee VALUES (2, 'Smith', 80, 'Mgr', '09/03/2006', 80000, NULL)
- B、INSERT INTO employee VALUES (4, 'Smith', 86, 'Mgr', '07/14/2003', 90000, NULL)
- C、INSERT INTO employee VALUES (1, 'Smith', 55, 'Sales', '07/14/2003', NULL, NULL)
- D、INSERT INTO employee VALUES (3, 'Smith', 33, 'Analyst', '11/26/2006', 90000, NULL)
参考答案
更多 “ A table was created using the following DDL: CREATE TABLE employee (id SMALLINT NOT NULL, name VARCHAR(9), dept SMALLINT CHECK (dept BETWEEN 10 AND 100), job CHAR(10) CHECK (job IN ('Sales','Mgr','Clerk')), hiredate DATE, salary DECIMAL(7,2), comm DECIMAL(7,2), PRIMARY KEY (id), CONSTRAINT yearsal CHECK (YEAR(hiredate) 2004 OR salary 80500) ); Which of the following INSERT statements will fail?（）A、INSERT INTO employee VALUES (2, 'Smith', 80, 'Mgr', '09/03/2006', 80000, NULL)B、INSERT INTO employee VALUES (4, 'Smith', 86, 'Mgr', '07/14/2003', 90000, NULL)C、INSERT INTO employee VALUES (1, 'Smith', 55, 'Sales', '07/14/2003', NULL, NULL)D、INSERT INTO employee VALUES (3, 'Smith', 33, 'Analyst', '11/26/2006', 90000, NULL)” 相关考题
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Examine the command that is used to create a table： SQL CREATE TABLE orders（oid NUMBER（6） PRIMARY KEY， odate DATE， ccode NUMBER （6）， oamtNUMBER（10，2）） TABLESPACE users； Which two statements are true about the effect of the above command（）A、A CHECK constraint is created on the OID column.B、A NOT NULL constraint is created on the OID column.C、The ORDERS table is the only object created in the USERS tablespace.D、The ORDERS table and a unique index are created in the USERS tablespace.E、The ORDERS table is created in the USERS tablespace and a unique index is created on the OID columnin the SYSTEM tablespace.
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An index called ORD_CUSTNAME_IX has been created on the CUSTNAME column in the ORDERS table using the following command: SQLCREATE INDEX ord_custname_ix ON orders(custname); The ORDERS table is frequently queried using the CUSTNAME column in the WHERE clause. You want to check the impact on the performance of the queries if the index is not available. You do not want the index to be dropped or rebuilt to perform this test.Which is the most efficient method of performing this task?（）A、disabling the indexB、making the index invisibleC、making the index unusableD、using the MONITORING USAGE clause for the index
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考题
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Issue the ALTER TABLE SCOTT.DEPT SHRINK SPACE COMPACT； statement.B
Issue the ALTER TABLE SCOTT.DEPT SHRINK SPACE； statement.C
Issue the ALTER TABLE SCOTT.DEPT SHRINK SPACE CASCADE； statement.D
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考题
单选题An index called ORD_CUSTNAME_IX has been created on the CUSTNAME column in the ORDERS table using the following command： SQLCREATE INDEX ord_custname_ix ON orders（custname）； The ORDERS table is frequently queried using the CUSTNAME column in the WHERE clause. You want to check the impact on the performance of the queries if the index is not available. You do not want the index to be dropped or rebuilt to perform this test. Which is the most efficient method of performing this task？（）A
disabling the indexB
making the index invisibleC
making the index unusableD
using the MONITORING USAGE clause for the index
考题
单选题What is true about sequences? （）A
Once created, a sequence belongs to a specific schema.B
Once created, a sequence is linked to a specific table.C
Once created, a sequence is automatically available to all users.D
Only the DBA can control which sequence is used by a certain table.E
Once created, a sequence is automatically used in all INSERT and UPDATE statements.
考题
多选题Which two operations can be performed on an external table（）ACreate a view on the table.BCreate an index on the table.CCreate a synonym on the table.DAdd a virtual column to the table.EUpdate the table using the UPDATE statement.FDelete rows in the table using the DELETE command.
考题
多选题Which two operations can be performed on an external table（）ACreate a view on the table.BCreate an index on the table.CCreate a synonym on the table.DAdd a virtual column to the table.EUpdate the table using the UPDATE statement.FDelete rows in the table using the DELETE command
考题
单选题Examine the following steps performed on a database instance： 1. The DBA grants the CREATE TABLE system privilege to the SKD user with ADMIN OPTION. 2. The SKD user creates a table. 3. The SKD user grants the CREATE TABLE system privilege to the HR user. 4. The HR user creates a table. 5. The DBA revokes the CREATE TABLE system privilege from SKD. Which statement is true after step 5 isperformed（）A
The table created by SKD is not accessible and SKD cannot create new tables.B
The tables created by SKD and HR remain， but both cannot create new tables.C
The table created by HR remains and HR still has the CREATE TABLE system privilege.D
The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.
考题
单选题On Monday， you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday， you have a requirement to restore the DEPT table from the recycle bin. Which statement is correct？（）A
You can restore the DEPT table by using the Oracle Flashback Drop feature， provided you use the RENAME TO clause.B
You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.C
You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.D
You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.
考题
单选题An index called ORD_CUSTNAME_IX has been created on the CUSTNAME column in the ORDERS table using the following command: SQLCREATE INDEX ord_custname_ix ON orders(custname); The ORDERS table is frequently queried using the CUSTNAME column in the WHERE clause. You want to check the impact on the performance of the queries if the index is not available. You do not want the index to be dropped or rebuilt to perform this test.Which is the most efficient method of performing this task?（）A
disabling the indexB
making the index invisibleC
making the index unusableD
using the MONITORING USAGE clause for the index
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