derby

问题 The title is the error I'm getting, when I click load my program freezes. I assume its because I'm doing a statement inside a statement, but from what I see its the only solution to my issue. By loading I want to just repopulate the list of patients, but to do so I need to do their conditions also. The code works, the bottom method is what I'm trying to fix. I think the issue is that I have 2 statements open but I am not sure. load: public void DatabaseLoad() { try { String Name = "Wayne";

问题 I have expiry and manufacturing dates (data type DATE) in products table in database and I want to apply following formula to get my desired result: SELECT * FROM products WHERE (RecentDate - expiry / manufacturing - expiry) * 100 > = 70; it will show the products whose life time has exceeded more than 70 percent. How can I design a query for this task (I am using Derby ). I tried this but didn't succeed SELECT * FROM PRODUCTS WHERE ({fn TIMESTAMPDIFF(SQL_TSI_DAY, CURRENT_TIMESTAMP, EXPIRY)}

问题 I have a Java app that has an embedded Derby database (no hibernate though). The app is using the following properties: datasource.driverClassName = org.apache.derby.jdbc.EmbeddedDriver datasource.url = jdbc:derby:C:/derby/mydb; datasource.username = 1234 datasource.password = 1234 Everything is working fine and great. Now I need to package everything and give it to a client to install on their GlassFish server now I don't want the client to install Derby and I don't want them to know that

问题 (Edit: I've added a bounty to the question. I found a workaround (posted as an answer below), but I'm hoping somebody can explain why the workaround was necessary in the first place.) I have a Spring webapp that connects to a Derby database during development. This works fine the first time I run the webapp, but in subsequent runs it fails during startup with the "Another instance of Derby may have already booted the database" SQLException. I understand that this is because the connection to

问题 Using the embedded driver I can connect to my derby database using the JDBC url: jdbc:derby:mydbname But, I usually put the full path for the db like: jdbc:derby:/Users/oreyes/dbs/mydbname Is there a way I can just specify the db name and have something like a "db_path" or something like that? 回答1: I'm not an expert with derby, setting derby.system.home as described in developers guide seems to work as you expect. 来源： https://stackoverflow.com/questions/3231614/javadb-derby-path-to-database

问题 First, this is my first time with Apache Derby. I am using netbeans, willing to use embedded apache derby, and I followed the following tutorial for configuring and installing the database. Then, I attached the derby.jar file to my project, using project properties. http://netbeans.org/kb/docs/ide/java-db.html#starting The attached image will show my database status in netbeans My database name is "contact". Table name is "FRIENDS". Following is my test code **DatabaseConnector.java** import

问题 I encounter problem with Hibernate EntityManager 3.5.3-Final when it comes to composite predicates. Example (not actual code snippet, but the idea should be clear): CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder(); Predicate predicate1 = criteriaBuilder.conjunction(); Predicate predicate2 = criteriaBuilder.conjunction(); // These are Boolean expression with common Root predicate1.getExpressions().add(expression1); predicate1.getExpressions().add(expression2); predicate2

问题 I downloaded the jar of Core Apache Derby database engine, which also includes the embedded JDBC driver (10.9.1.0). But that jar doesn't include the .class file of ClientDriver in the jdbc package. Why is that ? Where can i find this class file ? I need this file to connect to derby database from tomcat as the server. Please provide the download link of the complete jar so that i get the required .class file. 回答1: OK: have you looked on the Apache Derby page: http://db.apache.org/derby

问题 I have a project with a derby database in it. I want to be able to make a backup or export the database so I can give it with the project files to my lecturer. 回答1: By default, the database resides in your home folder under .netbeans-derby (this folder may be hidden under Windows). Copying this folder will work, but your lecturer will have to "register" this copied location with his IDE. To do this: Under Services , open the Databases node. Right-click on Java DB and select properties. In the

问题 I've been having a hard time trying to figure this out. First I have an insertProduct(Product p) method that is supposed to check if a product with the specified code exists in the database. If so, this method will display an error message. Otherwise, it should add the product to the database and print it to the console. I'm not sure if I'm doing that correctly. Second, the deleteProduct(Product p) method is supposed to delete the product that was added by the insertProduct method. Now the