ObjectDB ObjectDB

Internal Website Search

11-20 of 85 resultsRefresh
25

Literals in JPQL and Criteria Queries

, 07777L float: 3.14F, 0f, 1e2f, -2.f, 5.04e+17f double: 3.14, 0d, 1e2D, -2., 5.04e+17 ObjectDB ... are enclosed with double quotes (e.g. "Adam", "") and Java escape characters can be used (e.g. "Adam\'s ... ); Expression<Integer> i2 = cb.literal(Integer.ValueOf(2)); Expression<Double> d = cb.literal(3.4
20

GROUP BY and HAVING clauses

of numeric values. AVG - returns the average of numeric values as a double value. MIN - returns ... representing the sum of values. avg - returns a double type expression representing the average
20

Database Explorer

directory a path to it has to be specified. Alternatively, you can run the Explorer by double ... values inline in the Tree and Table viewer windows. Double click the field, press F2, or simply type
20

Index Definition

, long, float, double. Equivalent wrapper classes from package java.lang: Byte, Short, Character, Integer, Long, Float, Double. java.math.BigInteger, java.math.BigDecimal. java.lang.String. java.util.Date
20

JPA Primary Key

: boolean, byte, short, char, int, long, float, double. Equivalent wrapper classes from package java.lang: Byte, Short, Character, Integer, Long, Float, Double. java.math.BigInteger, java.math.BigDecimal
14

Entity Management Settings

and later on commit or flush. Usually, commit time only cascade (which is more efficient than double
14

CRUD Database Operations with JPA

a Double object reflecting the average x value of all the Point objects in the database. Retrieving
2

Step 2: Entity Class and Persistence Unit

a text editor (by right clicking and selecting Edit or by double click and then moving to the Source
2

[ODB1] Chapter 4 - JDO Metadata

, short, char, int, long, float or double) embedded wrapper (Boolean, Byte, Short, Character, Integer, Long, Float or Double) embedded java.lang.String embedded java.util.Date external (non embedded
2

[ODB1] Chapter 3 - Persistent Classes

are also persistent types: All the primitive types - boolean, byte, short, char, int, long, float and double. Selected classes in package java.lang: Boolean, Byte, Short, Character, Integer, Long, Float, Double, Number

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

Need Help?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support