Using sql DATEADD function in java

Question

When I run queries using DATEADD it seems that the database does not recognize this function. also when I just run select DATEADD(Month, -3, GETDATE()) I\'m get

Answer 1

ADD OR SUBTRACT ONE DAY IN DERBY select rundate, {fn TIMESTAMPADD(SQL_TSI_DAY, -1, RUNDATE)} from tst.YOUTH

Answer 2

For hsqldb:

DATEADD ( , , ) DATEADD ( 'month', 3, DATE '2008-11-22' )

Try it

select DATEADD(Month, -3, '2008-11-22')

For Derby:

Derby supports the JDBC escape function TIMESTAMPADD

TIMESTAMPDIFF( interval, timestampExpression1, timestampExpression2 )

values {fn timestampadd(SQL_TSI_DAY, 1, timestamp('2010-12-31 23:59:59'))};

Answer 3

Derby does not have a DATEADD function. You need to use the JDBC function timestampadd to achieve this:

select {fn TIMESTAMPADD(SQL_TSI_MONTH, -3, CURRENT_TIMESTAMP)}
from sysibm.sysdummy1

An alternative to using sysdummy1 is the ANSI standard values clause which works both in Derby and HSQLDB:

values ({fn TIMESTAMPADD(SQL_TSI_MONTH, -3, CURRENT_TIMESTAMP)})