jdbc - Java prepareStatement setting -


i have prepare statement this:

where  trade_date >= trunc(add_months(current_date,-12))

but want have this:

where  trade_date >= trunc(?)

and set value later this:

query.setstring(1,"add_months(current_date,-12)");

or

query.setstring(1,"trunc(sysdate, 'year')");

however, got error saying 

inconsistent datatypes: expected date got number

how can that?

i think you'll have build template statement using string concatenation etc, , record parameters wish insert alongside (in array of objects?).

then iterate through each 1 , perform setstring() etc. can't insert arbitrary sql using preparedstatement (it defeat 1 of preparedstatement's benefits, restrict sql construction customising parameters)


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