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（）
Given the security constraint in a DD:// 101. 102. 103.Foo 104./Bar/Baz/* 105.POST 106. 107. 108.DEVELOPER 109. 110. And given that "MANAGER" is a valid role-name，which four are true for this security constraint？（）
A constraint in a table is defined with the INITIALLY IMMEDIATE clause. You executed the ALTER TABLEcommand with the ENABLE VALIDATE option to enable the constraint that was disabled. What are the twoeffects of this command（）
Which of the following is true of an index used to support a UNIQUE constraint?（）
Which statement adds a constraint that ensures the CUSTOMER_NAME column of the CUSTOMERS table holds a value?（）
You need to create a column that allows you to createa unique constraint. Which two column definitions should you choose?（）
Which statement explicitly names a constraint?（）
What type of constraint can be used to ensure that, in any given row in a table, the value of one column never exceeds the value of another column?（）
Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?（）
Which statement explicitly names a constraint? （）
