Answer:to add a column to existing table.
to rename any existing column.
to change datatype of any column or to modify its size.
to drop a column from the table.
Explanation:
hope this help
 
        
             
        
        
        
Answer: c) Return on investment (ROI)
Explanation: 
Return on investment (ROI)  is defined as term that measures the performance of single investment efficiency or numerous investment plans. It evaluates and assess plan of investment in form of ratio or percentage.
- Return of investment(ROI) plan is calculated through dividing the return of investment by investment cost.
- Other options are incorrect because cash return on capital invested ,carried forward(CF) and BI (business intelligence) are not used for calculating the investment plan through cost and benefit.Thus, the correct option is option(c)
 
        
             
        
        
        
Answer:
films
Explanation:
- Pictures, comic strips, and animations is wrong because they are static images.
- Films are known as "moving pictures" and therefore are moving images. That makes film your correct answer.
- Hope this helps! If you would like a further explanation please let me know.
 
        
             
        
        
        
Answer: Press enter at the end of the line.
Explanation:
If you press enter at the end of the line or sentence, it will start a new space underneath your line or sentence.