Questions tagged as 'jdbc'

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Catching a PDF file from the database using JDBC

Hello, I need to get a PDF file from the database. I use JDBC. Would anyone have an idea?     
asked by 21.05.2018 / 19:43
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Assertions with timers in JMETER

Good morning everyone, I have thousands of requests and two assertions in jMETER. How much does the requests, my SQL, The structure of my thread is as follows. -I'mcurrentlysimulating5,000users.-TheHTTPserviceIamtestingisanon-screenendpoint...
asked by 10.05.2018 / 17:13
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Select from 2 Java tables

Hello everyone, I'm having trouble getting data from 2 different tables from the HSQLDB database, my DAO class looks like this: @Override public List<Animal> listar() throws Exception { List<Animal> lista = new ArrayList<>...
asked by 12.04.2018 / 19:13
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Spring Boot query does not return records

I'm developing a system with Java 8 and Spring Boot with JDBC accessing an Oracle base. When I make a query using the NamedParameterJdbcTemplate, it does not return any records, but if I copy the same query and search the Oracle client directly,...
asked by 10.04.2018 / 16:05
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Error: "No Persistence provider for EntityManager"

I have a project in Eclipse with an application that persists in the Postgresql 9.6 database through Hibernate, but Java is not recognizing the persistence-unit name that is set in persistence.xml , even this name by checking with the name pa...
asked by 17.03.2018 / 09:59
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I need to connect econometric software to Teradata databases

I'm looking for connection solutions, better than ODBC / JDBC, from some econometric software such as SAS, Matlab, STATA, ACL, EViews to my base on Teradata, including In-Database processing solutions.     
asked by 08.03.2018 / 17:20
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Failure to build netbeans project

When I run it works normally, but when I try to clean it and build it it has this error: warning: Supported source version 'RELEASE_6' from annotation processor 'org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor' less tha...
asked by 06.03.2018 / 14:05
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Java.Lang.NullPoinerException when trying to insert database data into a JComboBox [duplicate]

Today my team and I encountered a problem when trying to do something seemingly simple: display the surname of an official in a JComboBox. The problem is that at the time of opening the screen we receive a NullPointerException and the Combo is...
asked by 23.02.2018 / 20:27
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How to check if user has already been registered in the database?

How can I check if a user is already registered? For example, when registering a user check if the login has already been saved in the database. DAO looked like this: public boolean validarLogin (String login) throws SQLException, ClassNotFoun...
asked by 15.02.2018 / 20:20
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Return DB data using List / ArrayList - Java

I'm having a problem, I set up a PivotTable in PostgreSQL and I need to print the lines of it, doing a Java method, the start of which is already established. That would be with a simple% w / o having as a parameter the start and end dates. H...
asked by 08.02.2018 / 19:02