From the sentence "SQL acts as a declarative language": (first paragraph), one can deduce that

I. it is a nonprocedural language. 
II. it results in many lines of code. 
III. users concentrate on defining the input and output.

Which of them is correct?

According to the text, one can say that

In order to return the database to some previous state, I use the command ________. Choose the right alterna-tive to complete the blank in the sentence.

Match the first column to the second column.

( ) SELECT 
( ) Transaction 
( ) UPDATE 
( ) GROUP BY

1. Used to wrap around the DML operations 
2. The FROM clause is followed by a JOIN clause 
3. Used for data retrieval 
4. Used for data manipulation 
5. Used to group the retrieved data

The correct sequence, from the top to the bottom is

The text is not about?

Acording to the text, ROLLBACK is an operation that

The expression "which either completes completely or not at all" , underlined in the text, means

Based on the text above, judge the following items.

Every organization trusts in computer and information technology to better operate.

Based on the text above, judge the following items.

Well-trained employees has no longer been required to work with technological advances.

Based on the text above, judge the following items.

New tasks demanded by new technologies are already known by workers.