Using sql DATEADD function in java

问题:

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 getting:

Error code -1, SQL state 42X01: Syntax error: Encountered "<EOF>" at line 1, column 36.

I added the JAR file from hsqldb-2.2.9 as you can see

What am I missing here?

回答1:

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)})

回答2:

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

回答3:

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'))};