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108

Strings in JPQL and Criteria Queries

to 'RGENTINA'. TRIM(TRAILING 'A' FROM 'ARGENTINA') is evaluated to 'ARGENTIN'. CONCAT - String Concatenation The CONCAT(str1, str2, ...) function returns the concatenation of the specified strings. For example: CONCAT('Serbia', ' and ', 'Montenegro') is evaluated to 'Serbia and Montenegro'. SUBSTRING
94

concat(x, y)

Method javax.persistence.criteria.CriteriaBuilder Expression<String> concat( Expression<String> x, Expression<String> y ) Create an expression for string concatenation. Parameters: x - string expression y - string expression Returns: expression corresponding to concatenation Since: JPA 2.0
94

concat(x, y)

Method javax.persistence.criteria.CriteriaBuilder Expression<String> concat( String x, Expression<String> y ) Create an expression for string concatenation. Parameters: x - string y - string expression Returns: expression corresponding to concatenation Since: JPA 2.0
94

concat(x, y)

Method javax.persistence.criteria.CriteriaBuilder Expression<String> concat( Expression<String> x, String y ) Create an expression for string concatenation. Parameters: x - string expression y - string Returns: expression corresponding to concatenation Since: JPA 2.0
94

concat(x, y)

Method javax.persistence.criteria.CriteriaBuilder Expression<T> concat( Expression<T> x, Expression<T> y ) Create an expression for string concatenation. Parameters: x - string expression y - string expression Returns: expression corresponding to concatenation Since: JPA 2.0
27

FROM clause (JPQL / Criteria API)

, CHARACTER_LENGTH, CLASS, COALESCE, CONCAT, COUNT, CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP
27

ObjectDB Object Database Features

& functions (LIKE, CONCAT, TRIM, SUBSTRING, ...). JPQL collection operators & functions (IS EMPTY, MEMBER
27

JPA Criteria API Queries

, quot, mod, abs, neg, sqrt). String expressions (like, length, locate, lower, upper, concat, substring
27

JPA Query Expressions (JPQL / Criteria)

, sqrt). String expressions (like, length, locate, lower, upper, concat, substring, ...). Data
14

javax.persistence.criteria.CriteriaBuilder

- expression Returns: coalesce expression Since: JPA 2.0 Expression<String> concat( Expression<String> x ... Since: JPA 2.0 Expression<String> concat(String x, Expression<String> y) Create an expression for string ... expression Returns: expression corresponding to concatenation Since: JPA 2.0 Expression<String> concat

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.

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