AdoQuery Error using parameters

Question

I need update a field value , increasing the old value. something like ths

UPDATE MYTABLE SET FIELD1=FIELD1+VALUE WHERE ....

but when run the n

Answer 1

Quick guess (nothingto hand right now to play with this) but try putting the parameter in brackets thus;

UPDATE DIPTT SET VALRECON=(:RECON)+(VALRECON) WHERE NUM=:NUM etc

Failing that, your best route might be to construct the SQL statement dynamically for that part eg

FSQL:='UPDATE DIPTT SET VALRECON=VALRECON+' + IntToStr(d1) + 
      ' WHERE NUM=:NUM etc';
AdoQuery.SQL.Text:=FSQL;

then set your Num parameter values (etc) as before