Initially count is 0 in database. i need to update count every time whenever request comes.
Update Query
Here count is initially 0.
suppose int count=10;
query.setParameter("count",count);
it will update only one time
the output is 11.next time same query update same output 11 will come.but i need 12 is the output.
String hql = "Update User f set f.count =:count + 1 where f.userId =:userId";
Query query = session.createQuery(hql);
query.setParameter("userId", userId);
//query.setParameter("count", count);
result = query.executeUpdate();
count is not updated. looking positive replay.
Thank you..!
Did you try?
"Update User f set f.count=(f.count + 1) where f.userId =:userId";
Related
im having a hard time finding where is my mistake so i could use some help.
I'm using 2 tables. "diamerismata", and another one based on which users selects in previous steps, you'll be looking at it as "+KataxDiamTable+".
My query is:
String monthly = "SELECT diamerismata.DIAMERISMA as Διαμέρισμα, diamerismata.ΟΝΟΜΑ as Όνομα, "+KataxDiamTable+".LASTDIFF as ΠρΔιαφορά, "+KataxDiamTable+".ΧΡΕΩΣΕΙΣ as Χρέωση, "+KataxDiamTable+".DATE as Ημερομηνία, "+KataxDiamTable+".DIFF as Διαφορά FROM diamerismata, "+KataxDiamTable+" WHERE MONTH("+KataxDiamTable+".DATE) = "+ms+" AND YEAR("+KataxDiamTable+".DATE) = "+yr+" AND "+KataxDiamTable+".IDdiam = diamerismata.IDdiam AND ID = ( SELECT MAX(ID) FROM "+KataxDiamTable+" WHERE "+KataxDiamTable+".IDdiam = diamerismata.IDdiam) ORDER BY diamerismata.DIAMERISMA";
But it only returns 4 rows when it should be returning 10.
"yr" and "ms" are date filters. But every record of mine has the same date, so the problem isn't there...
IDdiam and ID are ASC and UNIQUE.
Any Ideas? Thank you
I am newbie to work on spring, and now I got a query but not sure how to use jdbcTemplate to work on it, the query is as follow:
UPDATE table set Seq = #seq := Seq + 1 WHERE id= ?; SELECT #seq as total;
I try to use jdbcTemplate.executeQuery but it will shows up error:
Can not issue data manipulation statements with executeQuery().
I try to use jdbcTemplate.executeUpdate, but seems it only return affected row
Is there anyone know how I can achieve this query and return the updated value?
You should be able to execute the UPDATE statement first using update and then execute the SELECT statement using queryForObject. The variable is persisted across the session bound to the same connection.
jdbcTemplate.update("UPDATE table set Seq = #seq := Seq + 1 WHERE id= ?", yourId);
int total = jdbcTemplate.queryForObject("SELECT #seq as total", Integer.class);
I came across a problem with going through a ResultSet I'm generating from my MySQL db. My query should return at most one row per table (I'm looping through several tables searching by employee number). I've entered data in some of the tables; but my test o/p says that the resultset contains 0 rows and doesn't go through the ResultSet at all. The o/p line it's supposed to print never appears. It was in a while loop before I realised that it'd be returning at most one row, at which point I just swapped the while(rs.next()) for an if(rs.first()). Still no luck. Any suggestions?
My code looks like this:
try
{
rsTablesList = stmt.executeQuery("show tables;");
while(rsTablesList.next())
{
String tableName = rsTablesList.getString(1);
//checking if that table is a non-event table; loop is skipped in such a case
if(tableName.equalsIgnoreCase("emp"))
{
System.out.println("NOT IN EMP");
continue;
}
System.out.println("i'm in " + tableName); //tells us which table we're in
int checkEmpno = Integer.parseInt(empNoLbl.getText()); //search key
Statement s = con.createStatement();
query = "select 'eventname','lastrenewaldate', 'expdate' from " + tableName + " where 'empno'=" + checkEmpno + ";"; // eventname,
System.out.println("query is \n\t" + query + "");
rsEventDetails = s.executeQuery(query) ;
System.out.println("query executed\n");
//next two lines for the number of rows
rsEventDetails.last();
System.out.println("no. of rows is " + rsEventDetails.getRow()+ "\n\n");
if(rsEventDetails.first())
{
System.out.println("inside the if");
// i will add the row now
System.out.println("i will add the row now");
// cdTableModel.addRow(new Object[] {evtname,lastRenewalDate,expiryDate});
}
}
}
My output looks like this:
I'm in crm
query is
select 'eventname','lastrenewaldate', 'expdate' from crm where 'empno'=17;
query executed
no. of rows is 0
I'm in dgr
query is
select 'eventname','lastrenewaldate', 'expdate' from dgr where 'empno'=17;
query executed
no. of rows is 0
NOT IN EMP
I'm in eng_prof
query is
select 'eventname','lastrenewaldate', 'expdate' from eng_prof where 'empno'=17;
query executed
no. of rows is 0
I'm in frtol
query is
select 'eventname','lastrenewaldate', 'expdate' from frtol where 'empno'=17;
query executed
no. of rows is 0
(and so on, upto 17 tables.)
The '17' in the query is the empno that I've pulled from the user.
The thing is that I've already entered data in the first two tables, crm and dgr. The same query in the command line interface works; this morning, I tried the program out and it returned data for the one table that had data in it (crm). The next time onwards, nothing.
Context: I'm working on a school project to create some software for my dad's office, it'll help them organise the training etc schedules for the employees. (a little like Google Calendar I guess.) I'm using Netbeans and Mysql on Linux Mint. There are about 17 tables in the database. The user selects an employee name and the program searches for all entries in the database that correspond to an 'event' (my generic name for a test/training/other required event) and puts them into a JTable.
The single quotes around the column names and table name in the creation of the query seem to have caused the problem. On changing them to backticks, retrieval works fine and the data comes in as expected.
Thank you, #juergend (especially for the nice explanation) and #nailgun!
I only need the two most current items in a result set and was wondering what the best way to do that would be without a break. I realize that rs.next() returns true or false and tried to stop it with a counter but that failed. I have this at the moment:
while(rs.next()){
String name = rs.getString("name");
String startTime = rs.getString("starting_time");
String endTime = rs.getString("ending_time");
String date = rs.getString("directory");
String loc = rs.getString("location");
htmlBuilder.append("<li><a href='public/committees/calendar'>"+ name+"<br>");
htmlBuilder.append(date +" "+startTime+" - "+endTime+"</a> <!-- Link/title/date/start-end time --><br>");
htmlBuilder.append("<strong>Location: </strong>"+loc+"<br>");
htmlBuilder.append("</li>");
}
html = htmlBuilder.toString();
As you can tell, this returns everything from the ResultSet but I only need the first two entries.
Here is my correct query:
SELECT to_char(to_date(to_char(x.starting_date), 'J'),'mm/dd/yyyy') as start_date, to_char(to_date(to_char(x.ending_date), 'J'),'mm/dd/yyyy') as end_date, to_char(to_date(to_char(x.starting_date), 'J'),'yyyy-mm-dd') as directory, x.starting_time, x.ending_time, x.description, x.description as location, x.name, x.short_name, x.add_info_url, x.contact_name, x.contact_info FROM calitem x, calendar x, calitemtypes x WHERE x.calendar_id = x.calendar_id AND x.short_name LIKE ? AND x.style_id = 0 AND x.starting_date > to_char(sysdate-1, 'J') AND x.item_type_id = x.item_type_id AND ROWNUM <= 3 ORDER BY to_date(to_char(x.starting_date), 'J')
Adding the rownum attribute worked perfectly and the query was ordered before return. Thanks for the help
You should limit the query to return only the two most current rows. This can by achieved by a LIMIT clause (exists in MySQL, not sure about other DBs) and an ORDER BY clause.
There is not need to add an index that would count the rows returned by the ResultSet.
I am trying to get just the count of the rows returned rather than all the results from the table.
I saw that this can be done like this:
( (Integer) session.createQuery("select count(*) from ....").iterate().next() ).intValue()
But when trying to store this query in an integer format(it says cannot convert from Query to Integer)
I am using a dynamic query where the values will be mentioned below the query like this
theQuery = "select count(*) from THM as thm " +
"join thm.TMC as tmc " +
"join tmc.TIMCC as timcc " +
"where thm.Qid = :Qid and thm.Cv = :Cv and timcc.Did = :Did and timcc.Cv= :Cv";
Query query = session.createQuery(theQuery);
query.setInteger("Qid", Integer.parseInt(Qid));
query.setInteger("Did", Did);
query.setInteger("Cv",cV);
Now, how can i get a count of all the rows returned by using Hibernate query in a variable without using list.size but directly from the query?
Have you tried the query.uniqueResult(); ? As your Select count(*) will give you only one number, you should be able to retrieve it with this like int count = (Integer)query.uniqueResult();
To count based on a Criteria you can do this:
Criteria criteria = currentSession().createCriteria(type);
criteria.setProjection(Projections.rowCount());
criteria.uniqueResult();
I'm using the Criteria right now so I know for sure that it works. I saw the uniqueResult() solution on a website here: http://www.jroller.com/RickHigh/entry/hibernate_pagination_jsf_datagrid_prototype1
you can do this
long count = (long)session.createQuery("SELECT COUNT(e) FROM Employees e").getSingleResult();
Try it.
Long count = ((Long) session.createQuery("select count(*) from Book").uniqueResult());
Integer totalBooks = count.intValue();
Work for me
int list=(int)
sessionFactory.getCurrentSession().createSQLQuery("select count(*) as count from
Book").addScalar("count",IntegerType.INSTANCE).uniqueResult();