多項(xiàng)選擇題

User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， orany data definition language （DDL） command：
SQL> SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno；
SCOTT has opened another session to work with the database instance.
Which three operations would waitwhen issued in SCOTT’s second session（）

A.LOCK TABLE emp IN SHARE MODE；
B.LOCK TABLE emp IN EXCLUSIVE MODE；
C.UPDATE emp SET sal=sal*1.2 WHERE job=ANAGER？UPDATE emp SET sal=sal*1.2 WHERE job=？ANAGER？
D.INSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；
E.SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno

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單項(xiàng)選擇題

You have set Tablespace Full Metrics Threshold values for the USERS tablespace as follows：Warning （%）： 90Critical （%）： 95
Which background process is responsible for issuing alerts when the threshold is crossed（）

A.System monitor （SMON）
B.Process monitor （PMON）
C.Memory manager process （MMAN）
D.Manageability Monitor process （MMON）

多項(xiàng)選擇題

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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You have set Tablespace Full Metrics Threshold values for the USERS tablespace as follows：Warning （%）： 90Critical （%）： 95 Which background process is responsible for issuing alerts when the threshold is crossed（）

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（）

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You have set Tablespace Full Metrics Threshold values for the USERS tablespace as follows：Warning （%）： 90Critical （%）： 95
Which background process is responsible for issuing alerts when the threshold is crossed（）

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（）