Re: Problem updating a record
I would rather use '?' for the dates instead of concatenating them... 2013/12/3 Bob M rgmatth...@orcon.net.nz Thanks Myrna I can't tell you want happens as I have not run the code with a commit yet! Adding the one line psUpdate.executeUpdate(); is OK - thank you You are spot on with what I was assumingI did think that the update would only apply to the last record in my table What I am trying to do is to update only the newest record in the table That record has the highest primary key which is made up of the first two fields in each record Field 1 = Date and Field 2 = Time (which has values 0, 6, 12, and 18) Are you suggesting that the following would suffice? psUpdate = conn.prepareStatement(Update USD_JPY SET Return_predicted=?, Class_predicted=? where Date= +Date1 +and Time= + Time1) A final question If one was inserting a new record using psInsert what code do you use to execute the Insert? Bob M -- View this message in context: http://apache-database.10148.n7.nabble.com/Problem-updating-a-record-tp135856p135873.html Sent from the Apache Derby Users mailing list archive at Nabble.com.
Problems still in retrieving 'oldest' record and 'newest' record
Hi again My code currently does three transactions 1) updates the 'newest' record 2) inserts/appends a brand new record 3) deletes the 'oldest' record Of these three only number 2 is working correctly 1) my code does NOT identify the 'newest' record correctly 3) my code does NOT identify the 'oldest' record correctly My records use the first two fields as the unique key The first field is a date field and the second is a time field [the second only has 4 possible values 0, 6, 12, and 18] My code for (1) above is as follows... ** // retrieve the last record from the table rs = s.executeQuery(SELECT * FROM USD_JPY ORDER BY Date DESC, Time DESC FETCH FIRST ROW ONLY); rs.next(); String Date1 = rs.getString(Date); String Time1 = rs.getString(Time); myConsole.getOut().println(Latest record:- Date/Time: + Date1 + , + Time1); // Update this record by adding predicted return and predicted class psUpdate = conn.prepareStatement(UPDATE USD_JPY SET Return_predicted=?,Class_predicted=? WHERE Date = ' + Date1 +' AND Time = + Time1); statements.add(psUpdate); psUpdate.setDouble(1, return_current); psUpdate.setString(2, class_current); psUpdate.executeUpdate(); myConsole.getOut().println(Updated latest record with predicted return: + return_current + , predicted class: + class_current); *** My code for (3) above is as follows... ** // retrieve and output date and time of oldest record from the table rs = s.executeQuery(SELECT * FROM USD_JPY ORDER BY Date ASC, Time ASC FETCH FIRST ROW ONLY); rs.next(); String Date2 = rs.getString(Date); int Time2 = rs.getInt(Time); myConsole.getOut().println(Oldest record:- Date/Time: + Date2 + , + Time2); // and now delete this record. s.setCursorName(MYCURSOR); rs = s.executeQuery(SELECT * from USD_JPY WHERE Date = ' + Date2 + ' AND Time = + Time2 + FOR UPDATE); rs.next(); conn.prepareStatement(DELETE FROM USD_JPY WHERE CURRENT OF MYCURSOR).executeUpdate(); myConsole.getOut().println(Deleted oldest record); *** The code shows the 'latest' record as 31-12-2010, 12 and the next one as 31-12-2010, 18 The code shows the 'oldest' record as 01-01-2010, 0 and the next one as 01-01-2010, 6 Any suggestions welcome Bob M -- View this message in context: http://apache-database.10148.n7.nabble.com/Problems-still-in-retrieving-oldest-record-and-newest-record-tp135875.html Sent from the Apache Derby Users mailing list archive at Nabble.com.
Re: A new Apache Derby pronunciation.
On 11/30/13 6:49 AM, David G.P. wrote: Hello all, I am starting to use Derby for one project, and I just saw that you are collecting pronunciations of that sentence. I just recorded one with Spanish from Spain central-northern accent (Castilla-León). I can't edit the Wiki, so how can I contribute it? Thanks for all your work and I hope I can contribute more soon. Hi David, The wiki has been locked down and this is the first request we've had from someone who wasn't included on the contributor whitelist. We need to add you to that whitelist. What's your contributor name? Thanks, -Rick
Re: A new Apache Derby pronunciation.
I registered with the name studiosi in the wiki. Thanks! 2013/12/3 Rick Hillegas rick.hille...@oracle.com On 11/30/13 6:49 AM, David G.P. wrote: Hello all, I am starting to use Derby for one project, and I just saw that you are collecting pronunciations of that sentence. I just recorded one with Spanish from Spain central-northern accent (Castilla-León). I can't edit the Wiki, so how can I contribute it? Thanks for all your work and I hope I can contribute more soon. Hi David, The wiki has been locked down and this is the first request we've had from someone who wasn't included on the contributor whitelist. We need to add you to that whitelist. What's your contributor name? Thanks, -Rick
