Can you please share me code snippet to be written via JPA in order to generate the below sql query
SELECT COUNT(*) FROM Customer c
WHERE c.countryId ='Canada' AND
c.lanuguage ='ENG' AND
ROW_NUM <=10;
Because I tried in the below way. But MaxResults is not getting applied it seems as I can able to recieve the count more than 10.
Query query = em.createQuery("SELECT COUNT(c) FROM Customer c where c.countryId ='Canada' and c.lanuguage ='ENG'");
query.setMaxResults(10);
long customerCount = (Long)query.getSingleResult();
Select on count will always return a single value. If you want to have a count lower than 10, add HAVING.
SELECT COUNT(c) AS
FROM Customer c
WHERE c.countryId='Canada' and c.language='END'
HAVING COUNT(c)<=10
Related
My server would retrieve the latest ID from the database, now it is stuck and keeps returning the id 99999, even though the latest id is now 100040
My code is:
String insertTable = "SELECT * FROM dutyofcare ORDER BY Id DESC LIMIT 1";
ps = conn.prepareStatement(insertTable);
rs = ps.executeQuery();
String ResultS = "";
if (rs.next()) {
ResultS += rs.getString("Id");
}
The issue is that the ORDER BY in your query is doing a lexical (character-by-character) sort where 9 always comes after 1, and not numeric sort which handles the digit positions. This is because of the column type of ID. What you need is to ensure ID is a number before the sort is done.
Either change your ID to a numeric column type and run below query:
SELECT MAX(ID) from dutyofcare;
Or if you want to retain your column type (less efficient than above option):
select MAX(cast(ID AS UNSIGNED)) from dutyofcare;
Or if you want to retain your column type AND just fix your existing query (least efficient of all the options)
select * from dutyofcare order by CAST(ID AS UNSIGNED) desc limit 1;
All these methods basically treat the ID as number and choose the biggest value.
I am new to Hibernate. I have established a OneToMany mapping between User and Expense. I am trying to return expenses for a User for the last week.
This is the MySQL query that I am using.
select SUM(amount) from Expense INNER JOIN User ON Expense.user_id = User.id AND User.username ='testUser' WHERE created >= curdate() - INTERVAL DAYOFWEEK(curdate())+1 DAY AND created < curdate() - INTERVAL DAYOFWEEK(curdate())-1 DAY;
When I try to use this query in hibernate, I get a HibernateQueryException
String query = "select SUM(amount) from Expense INNER JOIN User ON Expense.user_id = User.id AND user.username ='sarvam' WHERE created >= curdate() - INTERVAL DAYOFWEEK(curdate())+1 DAY AND created < curdate() - INTERVAL DAYOFWEEK(curdate())-1 DAY";
List list = session.createQuery(query).list();
The error I get is-
Exception in thread "main" org.hibernate.QueryException: outer or full join must be followed by path expression [select SUM(amount) from com.challenge.pojo.Expense INNER JOIN User ON Expense.user_id = User.id AND user.username ='sarvam' WHERE created >= curdate() - INTERVAL DAYOFWEEK(curdate())+1 DAY AND created < curdate() - INTERVAL DAYOFWEEK(curdate())-1 DAY]
at org.hibernate.QueryException.generateQueryException(QueryException.java:120)
at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:103)
at org.hibernate.hql.internal.classic.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:233)
at org.hibernate.hql.internal.classic.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:193)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:115)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:76)
at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:150)
at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:298)
at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:236)
at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1825)
at com.challenge.dao.ExpenseDAO.getExpensesForLastWeek(ExpenseDAO.java:52)
at com.challenge.dao.ExpenseDAO.getExpensesForLastWeek(ExpenseDAO.java:44)
at com.challenge.dao.Test.main(Test.java:27)
Caused by: org.hibernate.QueryException: outer or full join must be followed by path expression
at org.hibernate.hql.internal.classic.FromParser.token(FromParser.java:253)
at org.hibernate.hql.internal.classic.ClauseParser.token(ClauseParser.java:93)
at org.hibernate.hql.internal.classic.PreprocessingParser.token(PreprocessingParser.java:118)
at org.hibernate.hql.internal.classic.ParserHelper.parse(ParserHelper.java:43)
at org.hibernate.hql.internal.classic.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:223)
... 10 more
Can anyone please help me fix it.
createQuery(String queryString) Create a new instance of Query for the
given HQL query string.
createSQLQuery(String queryString)
Create a new instance of SQLQuery for the given SQL query string.
You're using the first one which expects HQL as an input, for using native SQL you sould use the second one.
String query = "select SUM(amount) from Expense INNER JOIN User ON Expense.user_id = User.id AND user.username ='sarvam' WHERE created >= curdate() - INTERVAL DAYOFWEEK(curdate())+1 DAY AND created < curdate() - INTERVAL DAYOFWEEK(curdate())-1 DAY";
List list = session.createSQLQuery(query).list();
Session Documentation
You might want to take a look at: I can't make a inner join between two tables in hibernate hql query
If using HQL you have to their Object-Oriented style which might look something like this:
String query = "select SUM(amount) from Expense exp INNER JOIN User u ON e.user_id = u.id AND u.username = 'sarvam' ...";
List list = session.createQuery(query).list();
(untested)
Alternatively you can keep using standard SQL syntay if you instead use:
List list = session.createSQLQuery(query).list();
Then you might want to read Chapter 16 of the Hibernate Documentation.
Keep in mind that the SQL dialect depends on the underlying Database. Depending on your Application there might be a different database used on a different system which could break your SQL statements.
I'm using a query in my repository and i'm trying to select 10 random questions from a table. but I get this error
ASC or DESC expected got '('
and i have no idea why
#Query ( value = "select q from Question q where q.chapitre_id=:id order by
random() limit 10", nativeQuery = true)
List<Question> findQuestionsByChapitre(#Param("id") Long id);
First of all, ordering by 1, 2, 3 or whatever number means ordering by the column in the corresponding position; if you only select one column (q in your case) you will be able to order only by that (it may work in older versions though).
Then, the correct syntax for ordering by a casual value is order by rand()
This is what worked for me :
#Query ( value = "select * from question q where q.chapitre_id=:id order
by rand() limit 10", nativeQuery = true)
Question[] findQuestionsByChapitre(#Param("id") Long id);
I am trying to pull out records based on some comparison between two timstamps. here is my supposed code, but it is not working:
#Query("SELECT n FROM table1 n WHERE n.status IN ('FAILED') AND :currentDate- n.updatedDate > n.interval/24*60*60")
List<Entity> findAllSuchEntities(#Param("currentDate") DateTime currentDate);
The error message is : org.h2.jdbc.JdbcSQLException: Unknown data type: "?"; SQL statement.
In comparison, following query can pass compilation:
#Query("SELECT n FROM table1 n WHERE n.status IN ('FAILED') AND :currentDate > n.updatedDate")
List<Entity> findAllSuchEntities(#Param("currentDate") DateTime currentDate);
Try this:
#Query("SELECT n FROM table1 n WHERE n.status IN ('FAILED') AND n.updatedDate < (:currentDate - (n.interval/24*60*60))")
It is also a better solution as your previous query will most likely cause a full table scan.
I don't know how to title this question and I know it's just a simple and stupid logic need to be sorted out but I can explain what I need. I have a jasper report script and query in which I need a simple calculation based on a value gathered from Query below
SELECT TOTAL, PARTIAL FROM PRICE WHERE TOTAL > 0
now I need this value to be calculated as the expression below in jasper report script
VAR CALC += TOTAL + (PARTIAL) //as partial can be a -ve or +ve value
What's happening currently is that I didn't find a way to do this, whenever I assign value of TOTAL to a variable and try to use it, it always get's the value from Query and calculates, while I need it to be there only once and then perform calculation on it onward. For that I tried to use calculation="First" but that also gives the first value for all the time and continues. I hope I am able to put my problem well, please help
EDIT
QUERY
SELECT RECEIPTS.DATENEW AS DATE,
TICKETS.TICKETID AS TICKETID,
PAYMENTS.PAYMENT AS PAYMENT,
PAYMENTS.METHOD AS METHOD,
PAYMENTS.TOTAL AS TOTAL,
CUSTOMERS.NAME AS NAME,
(SELECT SUM(P.TOTAL) FROM PAYMENTS AS P
INNER JOIN RECEIPTS AS R ON P.RECEIPT = R.ID
INNER JOIN TICKETS AS T ON R.ID = T.ID
INNER JOIN CUSTOMERS AS C ON T.CUSTOMER = C.ID
WHERE C.ID = CUSTOMERS.ID and P.PAYMENT IN ('debt','debtpaid', 'advance', 'cashrefund')) AS CTOTAL
FROM RECEIPTS
INNER JOIN TICKETS ON RECEIPTS.ID = TICKETS.ID
INNER JOIN PAYMENTS ON RECEIPTS.ID = PAYMENTS.RECEIPT
INNER JOIN CUSTOMERS ON TICKETS.CUSTOMER = CUSTOMERS.ID
WHERE
PAYMENTS.PAYMENT IN ('debt', 'debtpaid', 'advance', 'cashrefund')
....
....
WHERE -TOTAL > 0
VARIABLE
<variable name="DUES" class="java.lang.Double" resetGroup="Customer" resetType="Group" calculation="Nothing">
<variableExpression><![CDATA[$F{CTOTAL} + $F{TOTAL}]]></variableExpression>
<initialValueExpression><![CDATA[new Double(0.0)]]></initialValueExpression>
</variable>
OUTPUT
You can define the variable itself in SQL statement like this :-
SELECT SUM(#csum := #csum + TOTAL+PARTIAL)
FROM (SELECT TOTAL, PARTIAL,#csum := 0
FROM PRICE WHERE TOTAL > 0
) a;
See this question and answer