javadb

Class [org.apache.derby.jdbc.ClientDriver] not found. When trying to connect to db

由 孤人 提交于 2019-11-28 10:19:52
I have set up a project in Netbeans, created a script, made a new database with javadb. I can connect to it by gui - display the tables contents etc, but when i run an application with: EntityManager em = Persistence.createEntityManagerFactory("lab5PU").createEntityManager(); i get this quite long exception: [EL Info]: 2013-04-05 21:40:45.554--ServerSession(1198260109)--EclipseLink, version: Eclipse Persistence Services - 2.3.0.v20110604-r9504 [EL Severe]: 2013-04-05 21:40:45.574--ServerSession(1198260109)--Local Exception Stack: Exception [EclipseLink-4003] (Eclipse Persistence Services - 2.3

Distribute a database made with JavaDB with Java program

由 好久不见. 提交于 2019-11-28 10:13:16
问题 I'm creating a program in Java in which I have to use a lot of tables. I made the decision to create all those tables in a JavaDB file. However, now I want to distribute this filled JavaDB file with my JAR file for distribution, since connecting to a server is not an option. In the past I could only distribute an empty database with the JAR by using that Derby package. Any ideas? Thank you so much! 回答1: I'm not sure I understood the question but it is possible to package a read-only database

Using timestampdiff in a Derby WHERE clause

由 倾然丶 夕夏残阳落幕 提交于 2019-11-28 08:57:32
问题 I would like to simulate the effect of the following type of query (that is in Microsoft SQL Server syntax) in a Derby database. The goal is to return all records in the table where the date stored in "someColumn" is less than 7 days old. Here is the Microsoft SQL syntax for what I wish to achieve... select * from someTable where datediff(dd, someColumn, getdate()) < 7 I have been able to determine that in Derby it will involve use of the timestampdiff function. But the syntax of the usage of

Retrieve id of record just inserted into a Java DB (Derby) database

由 心已入冬 提交于 2019-11-28 07:44:12
I am connecting to a Java DB database with JDBC and want to retrieve the id (which is on auto increment) of the last record inserted. I see this is a common question, but I see solutions using for example MS SQL Server, what is the equivalent for Java DB? No need to use a DBMS specific SQL for that. That's what getGeneratedKeys() is for. When preparing your statement you pass the name(s) of the auto-generated columns which you can then retrieve using getGeneratedKeys() PreparedStatement pstmt = connection.prepareStatement( "insert into some_table (col1, col2, ..) values (....)", new String[] {

Setting up an embedded Derby database in a standalone Java application

由 独自空忆成欢 提交于 2019-11-28 06:50:22
I'm trying to setup an embedded Derby database for a standalone Java application, but after pouring through all sorts of documentation, I just can't seem to find any simple explanations or examples. I'm using Eclipse with the Derby plugin and have enabled Derby nature for my project. I found an example of using an embedded Derby database in a standalone address book as well as an overview of using Derby in Eclipse (that doesn't seem to cover the embedded deployment), but I still feel like I'm missing something fundamental. This is my first time attempting to use a database with Java, and I'm a

Setting up an embedded Derby database in a standalone Java application

由 我的未来我决定 提交于 2019-11-27 05:42:27
问题 I'm trying to setup an embedded Derby database for a standalone Java application, but after pouring through all sorts of documentation, I just can't seem to find any simple explanations or examples. I'm using Eclipse with the Derby plugin and have enabled Derby nature for my project. I found an example of using an embedded Derby database in a standalone address book as well as an overview of using Derby in Eclipse (that doesn't seem to cover the embedded deployment), but I still feel like I'm

Create autoincrement key in Java DB using NetBeans IDE

由 [亡魂溺海] 提交于 2019-11-27 03:57:26
I'm coming from MySQL world, please help. Is it possible to create autoincrement key from NetBeans IDE in JavaDB? Do you use some more advanced db clients, which? Thanks. user28864 Found a way of setting auto increment in netbeans 8.0.1 here on StackoOverflow Screenshot below: Sam This may help you: CREATE TABLE "custinf" ( "CUST_ID" INT not null primary key GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1), "FNAME" VARCHAR(50), "LNAME" VARCHAR(50), "ADDR" VARCHAR(100), "SUBURB" VARCHAR(20), "PCODE" INTEGER, "PHONE" INTEGER, "MOB" INTEGER, "EMAIL" VARCHAR(100), "COMM" VARCHAR(450) );

Retrieve id of record just inserted into a Java DB (Derby) database

由 送分小仙女□ 提交于 2019-11-27 01:57:18
问题 I am connecting to a Java DB database with JDBC and want to retrieve the id (which is on auto increment) of the last record inserted. I see this is a common question, but I see solutions using for example MS SQL Server, what is the equivalent for Java DB? 回答1: No need to use a DBMS specific SQL for that. That's what getGeneratedKeys() is for. When preparing your statement you pass the name(s) of the auto-generated columns which you can then retrieve using getGeneratedKeys() PreparedStatement

Create autoincrement key in Java DB using NetBeans IDE

由 故事扮演 提交于 2019-11-26 10:58:03
问题 I\'m coming from MySQL world, please help. Is it possible to create autoincrement key from NetBeans IDE in JavaDB? Do you use some more advanced db clients, which? Thanks. 回答1: Found a way of setting auto increment in netbeans 8.0.1 here on StackoOverflow Screenshot below: 回答2: This may help you: CREATE TABLE "custinf" ( "CUST_ID" INT not null primary key GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1), "FNAME" VARCHAR(50), "LNAME" VARCHAR(50), "ADDR" VARCHAR(100), "SUBURB"
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