javadb

问题 I'm using JavaDB and working with two tables in the same database. I'm trying to update the PrevSales column in the "SalesResp" table with the values that are in the "SellDate" column of the "Vehicles" table when the Vehicle table's SellDate is before a the specified date. I'm matching the data between the two tables by using the "VIN" column that is present in both tables. I continually get errors surrounding the inner join in my code, SQL state 42x01. UPDATE SALESRESP JOIN VEHICLES ON

问题 I am using Netbeans 7.4 to build my application. And also, I am using embedded java db. Now, I want to generate my JPA entities from my database from my database. But, when I rightclick my package -> New -> Entity classes from database , select my database, Available Tables is not showing up even a single one of the tables inside ANK schema. One more strange thing I noticed is when I connect my db from Netbeans services tab, two schema options appear. First, APP in bold, second Other schemas

问题 I am trying, for the first time, to run a java EE 7 web app without an IDE and struggling through the learning curve. To keep things simple I have started with Glassfish 4.1 and Derby 10.11.1.2 which is what I used for development. My current problem is an error configuring the connection pool on the Glassfish web interface. The error is 'Connection authentication failure occurred. Reason: Userid or password invalid'. However I have ij runing in a dos prompt and the Glashfish web console in

问题 Oracle ships the JDK with "JavaDB" which is more or less a rebranded version of Apache Derby. Is Java DB updated and synced continually with each update release of the JDK ("_uXX") or only for major releases like Java 7? 回答1: The Getting Started with Java DB guide addresses this in the note on the relationship between the two products: Relationship between Java DB and Apache Derby Java DB is a relational database management system that is based on the Java programming language and SQL. Java

问题 In the article Using Java DB in Desktop Applications the Address Book demo have a method disconnect which have a try-catch block that catch and ignores the exception. If you add a printStackTrace you can see that the exception always occur. What's wrong here? The JavaDB should not throw this exception, or they should fix something in the example program? 回答1: Shutdown commands always raise SQLExceptions. So nothing's wrong. That's just the way Derby works. 来源： https://stackoverflow.com

问题 I have to migrate my database from MySql to Derby. However, I am facing a problem, that it is not possible just to create sql dump and import in JavaDB. Is there an easy way, a tool or something that I can use? or should I do everything by hand? Danke 回答1: One good way, is to use DdlUtils. with this, you can export a database schema from one database and create it in another. This is the MySQL page. 来源： https://stackoverflow.com/questions/25065426/easy-way-migrate-data-from-mysql-to-derby

问题 I use embedded Apache derby for my application. I have a SQL script called createdb.sql that creates all tables in a database and populates it with initial data, e.g.: SET SCHEMA APP; CREATE TABLE study ( study_id bigint not null GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1), name varchar(50) not null, note varchar(1000) DEFAULT '', created TIMESTAMP DEFAULT CURRENT_TIMESTAMP, deleted boolean DEFAULT false, UNIQUE(name), CONSTRAINT primary_key PRIMARY KEY (study_id) ); INSERT

问题 I'm having problems initializing my javadb network server and setting a connection to it. It's a JavaFX program. This is what I have so far: try { Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance(); javadbserver = new NetworkServerControl(); javadbserver.start(null); } catch (ClassNotFoundException e) { Logger.getLogger(MainGuiController.class.getName()).log(Level.SEVERE, null, ex); System.out.println("Where is your JavaDB embedded Driver?"); return; } String dbName = "mydb";

问题 I need to do a SQL call in a small local JavaDB in Netbeans 7.2 to pull a single random row from the database. SELECT * FROM JAVA2.FORTUNES ORDER BY RANDOM() So far, I've got it to work using the RANDOM() function, but I'm having trouble getting LIMIT 1 to work, it returns a syntax error. I know that every database has a different way to do this, and I can't figure out how it works specifically for this JavaDB in Netbeans (I got it to work in a separate Oracle DB with different syntax). Is

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