## Querydsl SQL

The SQL module provides integration with the JDBC API.

**Maven integration**

 Add the following dependencies to your Maven project :

    <dependency>
      <groupId>com.mysema.querydsl</groupId>
      <artifactId>querydsl-sql</artifactId>
      <version>${querydsl.version}</version>
    </dependency>    
            
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.6.1</version>
    </dependency>   

**Code generation via Maven**

This functionality is also available as a Maven plugin. The presented example can be declared like this in the POM :
   
    <plugin>
      <groupId>com.mysema.querydsl</groupId>
      <artifactId>querydsl-maven-plugin</artifactId>
      <version>${querydsl.version}</version>
      <executions>
        <execution>
          <goals>
            <goal>export</goal>
          </goals>
        </execution>            
      </executions>
      <configuration>
        <jdbcDriver>org.apache.derby.jdbc.EmbeddedDriver</jdbcDriver>
        <jdbcUrl>jdbc:derby:target/demoDB;create=true</jdbcUrl>
        <packageName>com.myproject.domain</packageName>
        <targetFolder>${project.basedir}/target/generated-sources/java</targetFolder> 
      </configuration>
      <dependencies>
        <dependency>
          <groupId>org.apache.derby</groupId>
          <artifactId>derby</artifactId>
          <version>${derby.version}</version>
        </dependency>
      </dependencies>
    </plugin>  

Use the goal test-export to add the targetFolder as a test compile source root instead of a compile source root.

**Querying**

Querying with Querydsl SQL is as simple as this :
 
    QCustomer customer = new QCustomer("c");

    SQLTemplates dialect = new HSQLDBTemplates(); // SQL-dialect
    SQLQuery query = new SQLQuery(connection, dialect); 
    List<String> lastNames = query.from(customer)
        .where(customer.firstName.eq("Bob"))
        .list(customer.lastName);
        
For more information on the Querydsl SQL module visit the reference documentation http://www.querydsl.com/static/querydsl/latest/reference/html/ch02s03.html