How to add Days from a column to a current Date in DB2?

问题

I am writing this sql to dynamically calculate certain number of days as below. But I don't know how to make it work because I keep getting the error.

select Current Date + ( Dynamic numbr of days calculation here ) from  TableName

Usually all the guides shows examples as Current Date + 1 Day (this works but not the above) Any ideas how can I get it to work from ?

回答1:

select Current Date + Dynamic numbr DAYS FROM TableName

e.g.

select Current Date + 15 DAYS  from TableName

here 15 is dynamic number.

回答2:

SELECT CURRENT_DATE + (your dynamic numeric field) DAYS FROM FILE_NAME

Example based on AS400:

1)

SELECT CURDATE() + (FLDA) DAYS FROM FILEA

2)

SELECT CURDATE() + 8 DAYS FROM FILEA

回答3:

Try this

 SELECT                                            
 DATE(DTE_BILL_EFFCTV - 301 DAYS)                  
 FROM BILL_ACCT                 
 WHERE                                             
 DTE_BILL_EFFCTV > DATE(CURRENT DATE - 300 DAYS) ;

来源：https://stackoverflow.com/questions/8210697/how-to-add-days-from-a-column-to-a-current-date-in-db2