[多选]
Examine the following statement that is used to modify the constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE；
Which three statements are true regarding the above command（）

A . The constraint remains valid.
B . The index on the constraint is dropped.
C . It allows the loading of data into the table using SQL*Loader.
D . New data conforms to the constraint， but existing data is not checked
E . It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.

承载压力大的场合一般选用（）的润滑油。闪点高。凝点低。粘度小。粘度大。 You upgraded your database from pre-12c to a multitenant container database (CDB) containing pluggable databases (PDBs). Examine the query and its output: Which two tasks must you perform to add users with SYSBACKUP, SYSDG, and SYSKM privilege to the password file?（） Assign the appropriate operating system groups to SYSBACKUP, SYSDG, SYSKM.。 Grant SYSBACKUP, SYSDG, and SYSKM privileges to the intended users.。 Re-create the password file with SYSBACKUP, SYSDG, and SYSKM privilege and the FORCE argument set to No.。 Re-create the password file with SYSBACKUP, SYSDG, and SYSKM privilege, and FORCE arguments set to Yes.。 Re-create the password file in the Oracle Database 12c format.。表面的几何形状特征摆至步请被调查的消费者书面回答问题，从而了解其动机、态度、个性和价值观念等内容的研究方法是（）观察法。访谈法。问卷法。调查法。

Examine the following statement that is used to modify the constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE；
Which three statements are true regarding the above command（）

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[多选] Examine the following statement that is used to modify the constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE； Which three statements are true regarding the above command（）

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[多选]
Examine the following statement that is used to modify the constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE；
Which three statements are true regarding the above command（）