diff --git a/src/main/java/org/springframework/data/jpa/repository/query/JpaQueryCreator.java b/src/main/java/org/springframework/data/jpa/repository/query/JpaQueryCreator.java
index 6b64b85d8..bb1246833 100644
--- a/src/main/java/org/springframework/data/jpa/repository/query/JpaQueryCreator.java
+++ b/src/main/java/org/springframework/data/jpa/repository/query/JpaQueryCreator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2008-2015 the original author or authors.
+ * Copyright 2008-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,6 +15,7 @@
  */
 package org.springframework.data.jpa.repository.query;
 
+import static org.springframework.data.jpa.domain.AbstractPersistable_.*;
 import static org.springframework.data.jpa.repository.query.QueryUtils.*;
 import static org.springframework.data.repository.query.parser.Part.Type.*;
 
@@ -22,6 +23,7 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Set;
 
 import javax.persistence.criteria.CriteriaBuilder;
 import javax.persistence.criteria.CriteriaQuery;
@@ -30,6 +32,7 @@ import javax.persistence.criteria.Path;
 import javax.persistence.criteria.Predicate;
 import javax.persistence.criteria.Root;
 import javax.persistence.criteria.Selection;
+import javax.persistence.metamodel.SingularAttribute;
 
 import org.springframework.data.domain.Sort;
 import org.springframework.data.jpa.repository.query.ParameterMetadataProvider.ParameterMetadata;
@@ -45,6 +48,7 @@ import org.springframework.util.Assert;
  * Query creator to create a {@link CriteriaQuery} from a {@link PartTree}.
  * 
  * @author Oliver Gierke
+ * @author Mark Paluch
  */
 public class JpaQueryCreator extends AbstractQueryCreator<CriteriaQuery<? extends Object>, Predicate> {
 
@@ -53,6 +57,7 @@ public class JpaQueryCreator extends AbstractQueryCreator<CriteriaQuery<? extend
 	private final CriteriaQuery<? extends Object> query;
 	private final ParameterMetadataProvider provider;
 	private final ReturnedType returnedType;
+	private final PartTree tree;
 
 	/**
 	 * Create a new {@link JpaQueryCreator}.
@@ -66,6 +71,7 @@ public class JpaQueryCreator extends AbstractQueryCreator<CriteriaQuery<? extend
 			ParameterMetadataProvider provider) {
 
 		super(tree);
+		this.tree = tree;
 
 		CriteriaQuery<? extends Object> criteriaQuery = createCriteriaQuery(builder, type);
 
@@ -87,7 +93,7 @@ public class JpaQueryCreator extends AbstractQueryCreator<CriteriaQuery<? extend
 
 		Class<?> typeToRead = type.getTypeToRead();
 
-		return typeToRead == null ? builder.createTupleQuery() : builder.createQuery(typeToRead);
+		return (typeToRead == null || tree.isExistsProjection()) ? builder.createTupleQuery() : builder.createQuery(typeToRead);
 	}
 
 	/**
@@ -162,6 +168,24 @@ public class JpaQueryCreator extends AbstractQueryCreator<CriteriaQuery<? extend
 			}
 
 			query = query.multiselect(selections);
+		} else if (tree.isExistsProjection()) {
+
+			if (root.getModel().hasSingleIdAttribute()) {
+
+				SingularAttribute<?, ?> id = root.getModel().getId(root.getModel().getIdType().getJavaType());
+				query = query.multiselect(root.get((SingularAttribute) id).alias(id.getName()));
+			} else {
+
+				List<Selection<?>> selections = new ArrayList<Selection<?>>();
+
+				Set<SingularAttribute<?, ?>> idClassAttributes = (Set<SingularAttribute<?, ?>>) root.getModel().getIdClassAttributes();
+
+				for (SingularAttribute<?, ?> attribute : idClassAttributes) {
+					selections.add(root.get((SingularAttribute) attribute).alias(attribute.getName()));
+				}
+				selections.add(root.get((SingularAttribute) id).alias(id.getName()));
+				query = query.multiselect(selections);
+			}
 		} else {
 			query = query.select((Root) root);
 		}
@@ -172,7 +196,7 @@ public class JpaQueryCreator extends AbstractQueryCreator<CriteriaQuery<? extend
 
 	/**
 	 * Creates a {@link Predicate} from the given {@link Part}.
-	 * 
+	 *
 	 * @param part
 	 * @param root
 	 * @param iterator
diff --git a/src/main/java/org/springframework/data/jpa/repository/query/JpaQueryExecution.java b/src/main/java/org/springframework/data/jpa/repository/query/JpaQueryExecution.java
index 6a5833df3..6225934dd 100644
--- a/src/main/java/org/springframework/data/jpa/repository/query/JpaQueryExecution.java
+++ b/src/main/java/org/springframework/data/jpa/repository/query/JpaQueryExecution.java
@@ -276,6 +276,20 @@ public abstract class JpaQueryExecution {
 		}
 	}
 
+	/**
+	 * {@link Execution} performing an exists check on the query.
+	 *
+	 * @author Mark Paluch
+	 * @since 1.11
+	 */
+	static class ExistsExecution extends JpaQueryExecution {
+
+		@Override
+		protected Object doExecute(AbstractJpaQuery query, Object[] values) {
+			return !query.createQuery(values).getResultList().isEmpty();
+		}
+	}
+
 	/**
 	 * {@link Execution} executing a stored procedure.
 	 * 
diff --git a/src/main/java/org/springframework/data/jpa/repository/query/PartTreeJpaQuery.java b/src/main/java/org/springframework/data/jpa/repository/query/PartTreeJpaQuery.java
index 501269d14..d780d0a9a 100644
--- a/src/main/java/org/springframework/data/jpa/repository/query/PartTreeJpaQuery.java
+++ b/src/main/java/org/springframework/data/jpa/repository/query/PartTreeJpaQuery.java
@@ -26,6 +26,7 @@ import javax.persistence.criteria.CriteriaQuery;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.jpa.provider.PersistenceProvider;
 import org.springframework.data.jpa.repository.query.JpaQueryExecution.DeleteExecution;
+import org.springframework.data.jpa.repository.query.JpaQueryExecution.ExistsExecution;
 import org.springframework.data.jpa.repository.query.ParameterMetadataProvider.ParameterMetadata;
 import org.springframework.data.repository.query.ParametersParameterAccessor;
 import org.springframework.data.repository.query.ResultProcessor;
@@ -94,7 +95,14 @@ public class PartTreeJpaQuery extends AbstractJpaQuery {
 	 */
 	@Override
 	protected JpaQueryExecution getExecution() {
-		return this.tree.isDelete() ? new DeleteExecution(em) : super.getExecution();
+
+		if(this.tree.isDelete()) {
+			return new DeleteExecution(em);
+		} else if(this.tree.isExistsProjection()) {
+			return new ExistsExecution();
+		}
+
+		return super.getExecution();
 	}
 
 	/**
@@ -168,6 +176,10 @@ public class PartTreeJpaQuery extends AbstractJpaQuery {
 				query.setMaxResults(tree.getMaxResults());
 			}
 
+			if(tree.isExistsProjection()) {
+				query.setMaxResults(1);
+			}
+
 			return query;
 		}
 
diff --git a/src/test/java/org/springframework/data/jpa/domain/sample/EmbeddedIdExampleEmployee.java b/src/test/java/org/springframework/data/jpa/domain/sample/EmbeddedIdExampleEmployee.java
index d56ce2aa0..b09fd5ead 100644
--- a/src/test/java/org/springframework/data/jpa/domain/sample/EmbeddedIdExampleEmployee.java
+++ b/src/test/java/org/springframework/data/jpa/domain/sample/EmbeddedIdExampleEmployee.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2104 the original author or authors.
+ * Copyright 2013-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,7 @@ import javax.persistence.MapsId;
 
 /**
  * @author Thomas Darimont
+ * @author Mark Paluch
  */
 @Entity
 public class EmbeddedIdExampleEmployee {
@@ -33,6 +34,8 @@ public class EmbeddedIdExampleEmployee {
 	@ManyToOne(cascade = CascadeType.ALL)//
 	EmbeddedIdExampleDepartment department;
 
+	String name;
+
 	public EmbeddedIdExampleEmployeePK getEmployeePk() {
 		return employeePk;
 	}
@@ -48,4 +51,12 @@ public class EmbeddedIdExampleEmployee {
 	public void setDepartment(EmbeddedIdExampleDepartment department) {
 		this.department = department;
 	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
 }
diff --git a/src/test/java/org/springframework/data/jpa/domain/sample/IdClassExampleDepartment.java b/src/test/java/org/springframework/data/jpa/domain/sample/IdClassExampleDepartment.java
index c040b23fe..f7dba2b2d 100644
--- a/src/test/java/org/springframework/data/jpa/domain/sample/IdClassExampleDepartment.java
+++ b/src/test/java/org/springframework/data/jpa/domain/sample/IdClassExampleDepartment.java
@@ -18,6 +18,9 @@ package org.springframework.data.jpa.domain.sample;
 import javax.persistence.Entity;
 import javax.persistence.Id;
 
+/**
+ * @author Thomas Darimont
+ */
 @Entity
 public class IdClassExampleDepartment {
 
diff --git a/src/test/java/org/springframework/data/jpa/domain/sample/IdClassExampleEmployee.java b/src/test/java/org/springframework/data/jpa/domain/sample/IdClassExampleEmployee.java
index bf5be5e35..8ab1136d6 100644
--- a/src/test/java/org/springframework/data/jpa/domain/sample/IdClassExampleEmployee.java
+++ b/src/test/java/org/springframework/data/jpa/domain/sample/IdClassExampleEmployee.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 the original author or authors.
+ * Copyright 2013-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,10 @@ import javax.persistence.Id;
 import javax.persistence.IdClass;
 import javax.persistence.ManyToOne;
 
+/**
+ * @author Thomas Darimont
+ * @author Mark Paluch
+ */
 @IdClass(IdClassExampleEmployeePK.class)
 @Entity
 public class IdClassExampleEmployee {
@@ -27,6 +31,8 @@ public class IdClassExampleEmployee {
 	@Id long empId;
 	@Id @ManyToOne IdClassExampleDepartment department;
 
+	String name;
+
 	public long getEmpId() {
 		return empId;
 	}
@@ -42,4 +48,12 @@ public class IdClassExampleEmployee {
 	public void setDepartment(IdClassExampleDepartment department) {
 		this.department = department;
 	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
 }
diff --git a/src/test/java/org/springframework/data/jpa/repository/RepositoryWithCompositeKeyTests.java b/src/test/java/org/springframework/data/jpa/repository/RepositoryWithCompositeKeyTests.java
index 3416f27ca..e70db179b 100644
--- a/src/test/java/org/springframework/data/jpa/repository/RepositoryWithCompositeKeyTests.java
+++ b/src/test/java/org/springframework/data/jpa/repository/RepositoryWithCompositeKeyTests.java
@@ -46,7 +46,7 @@ import org.springframework.transaction.annotation.Transactional;
 
 /**
  * Tests some usage variants of composite keys with spring data jpa.
- * 
+ *
  * @author Thomas Darimont
  * @author Mark Paluch
  */
@@ -303,4 +303,49 @@ public class RepositoryWithCompositeKeyTests {
 
 		assertThat(result, hasSize(2));
 	}
+
+	/**
+	 * @see DATAJPA-920
+	 */
+	@Test
+	public void shouldExecuteExistsQueryForEntitiesWithEmbeddedId() {
+
+		EmbeddedIdExampleDepartment dep1 = new EmbeddedIdExampleDepartment();
+		dep1.setDepartmentId(1L);
+		dep1.setName("Dep1");
+
+		EmbeddedIdExampleEmployeePK key = new EmbeddedIdExampleEmployeePK();
+		key.setDepartmentId(1L);
+		key.setEmployeeId(1L);
+
+		EmbeddedIdExampleEmployee emp = new EmbeddedIdExampleEmployee();
+		emp.setDepartment(dep1);
+		emp.setEmployeePk(key);
+		emp.setName("White");
+
+		employeeRepositoryWithEmbeddedId.save(emp);
+
+		assertThat(employeeRepositoryWithEmbeddedId.existsByName(emp.getName()), is(true));
+	}
+
+	/**
+	 * @see DATAJPA-920
+	 */
+	@Test
+	public void shouldExecuteExistsQueryForEntitiesWithCompoundIdClassKeys() {
+
+		IdClassExampleDepartment dep2 = new IdClassExampleDepartment();
+		dep2.setDepartmentId(2L);
+		dep2.setName("Dep2");
+
+		IdClassExampleEmployee emp1 = new IdClassExampleEmployee();
+		emp1.setEmpId(3L);
+		emp1.setDepartment(dep2);
+		emp1.setName("White");
+
+		employeeRepositoryWithIdClass.save(emp1);
+
+		assertThat(employeeRepositoryWithIdClass.existsByName(emp1.getName()), is(true));
+		assertThat(employeeRepositoryWithIdClass.existsByName("Walter"), is(false));
+	}
 }
diff --git a/src/test/java/org/springframework/data/jpa/repository/UserRepositoryTests.java b/src/test/java/org/springframework/data/jpa/repository/UserRepositoryTests.java
index da24758bd..3a2ee4253 100644
--- a/src/test/java/org/springframework/data/jpa/repository/UserRepositoryTests.java
+++ b/src/test/java/org/springframework/data/jpa/repository/UserRepositoryTests.java
@@ -1096,6 +1096,18 @@ public class UserRepositoryTests {
 		assertThat(repository.countUsersByFirstname("Dave"), is(1));
 	}
 
+	/**
+	 * @see DATAJPA-231
+	 */
+	@Test
+	public void executesDerivedExistsQuery() {
+
+		flushTestUsers();
+
+		assertThat(repository.existsByLastname("Matthews"), is(true));
+		assertThat(repository.existsByLastname("Hans Peter"), is(false));
+	}
+
 	/**
 	 * @see DATAJPA-332
 	 */
diff --git a/src/test/java/org/springframework/data/jpa/repository/query/PartTreeJpaQueryIntegrationTests.java b/src/test/java/org/springframework/data/jpa/repository/query/PartTreeJpaQueryIntegrationTests.java
index 0ea336ef3..ebb09dae6 100644
--- a/src/test/java/org/springframework/data/jpa/repository/query/PartTreeJpaQueryIntegrationTests.java
+++ b/src/test/java/org/springframework/data/jpa/repository/query/PartTreeJpaQueryIntegrationTests.java
@@ -56,6 +56,7 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
  * Integration tests for {@link PartTreeJpaQuery}.
  * 
  * @author Oliver Gierke
+ * @author Mark Paluch
  */
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration("classpath:infrastructure.xml")
@@ -120,6 +121,34 @@ public class PartTreeJpaQueryIntegrationTests {
 		assertThat(HibernateUtils.getHibernateQuery(getValue(query, PROPERTY)), endsWith("firstname is null"));
 	}
 
+	/**
+	 * @see DATAJPA-920
+	 */
+	@Test
+	public void shouldLimitExistsProjectionQueries() throws Exception {
+
+		JpaQueryMethod queryMethod = getQueryMethod("existsByFirstname", String.class);
+		PartTreeJpaQuery jpaQuery = new PartTreeJpaQuery(queryMethod, entityManager, provider);
+
+		Query query = jpaQuery.createQuery(new Object[]{"Matthews"});
+
+		assertThat(query.getMaxResults(), is(1));
+	}
+
+	/**
+	 * @see DATAJPA-920
+	 */
+	@Test
+	public void shouldSelectAliasedIdForExistsProjectionQueries() throws Exception {
+
+		JpaQueryMethod queryMethod = getQueryMethod("existsByFirstname", String.class);
+		PartTreeJpaQuery jpaQuery = new PartTreeJpaQuery(queryMethod, entityManager, provider);
+
+		Query query = jpaQuery.createQuery(new Object[]{"Matthews"});
+
+		assertThat(HibernateUtils.getHibernateQuery(getValue(query, PROPERTY)), containsString(".id from User as"));
+	}
+
 	private void testIgnoreCase(String methodName, Object... values) throws Exception {
 
 		Class<?>[] parameterTypes = new Class[values.length];
@@ -173,6 +202,8 @@ public class PartTreeJpaQueryIntegrationTests {
 
 		User findByIdAllIgnoringCase(Integer id);
 
+		boolean existsByFirstname(String firstname);
+
 		List<User> findByCreatedAtAfter(@Temporal(TemporalType.TIMESTAMP) @Param("refDate") Date refDate);
 	}
 }
diff --git a/src/test/java/org/springframework/data/jpa/repository/sample/EmployeeRepositoryWithEmbeddedId.java b/src/test/java/org/springframework/data/jpa/repository/sample/EmployeeRepositoryWithEmbeddedId.java
index edf15484f..3454815fe 100644
--- a/src/test/java/org/springframework/data/jpa/repository/sample/EmployeeRepositoryWithEmbeddedId.java
+++ b/src/test/java/org/springframework/data/jpa/repository/sample/EmployeeRepositoryWithEmbeddedId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2015 the original author or authors.
+ * Copyright 2013-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,6 +30,7 @@ import com.querydsl.core.types.Predicate;
  * Demonstrates the support for composite primary keys with {@code @EmbeddedId}.
  * 
  * @author Thomas Darimont
+ * @author Mark Paluch
  */
 @Lazy
 public interface EmployeeRepositoryWithEmbeddedId
@@ -37,4 +38,9 @@ public interface EmployeeRepositoryWithEmbeddedId
 		QueryDslPredicateExecutor<EmbeddedIdExampleEmployee> {
 
 	List<EmbeddedIdExampleEmployee> findAll(Predicate predicate, OrderSpecifier<?>... orders);
+
+	/**
+	 * @see DATAJPA-920
+	 */
+	boolean existsByName(String name);
 }
diff --git a/src/test/java/org/springframework/data/jpa/repository/sample/EmployeeRepositoryWithIdClass.java b/src/test/java/org/springframework/data/jpa/repository/sample/EmployeeRepositoryWithIdClass.java
index f5439053e..a5228e523 100644
--- a/src/test/java/org/springframework/data/jpa/repository/sample/EmployeeRepositoryWithIdClass.java
+++ b/src/test/java/org/springframework/data/jpa/repository/sample/EmployeeRepositoryWithIdClass.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2015 the original author or authors.
+ * Copyright 2013-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,10 +30,16 @@ import com.querydsl.core.types.Predicate;
  * Demonstrates the support for composite primary keys with {@code @IdClass}.
  * 
  * @author Thomas Darimont
+ * @author Mark Paluch
  */
 @Lazy
 public interface EmployeeRepositoryWithIdClass extends JpaRepository<IdClassExampleEmployee, IdClassExampleEmployeePK>,
 		QueryDslPredicateExecutor<IdClassExampleEmployee> {
 
 	List<IdClassExampleEmployee> findAll(Predicate predicate, OrderSpecifier<?>... orders);
+
+	/**
+	 * @see DATAJPA-920
+	 */
+	boolean existsByName(String name);
 }
diff --git a/src/test/java/org/springframework/data/jpa/repository/sample/UserRepository.java b/src/test/java/org/springframework/data/jpa/repository/sample/UserRepository.java
index b01d19ee1..e9f7c2c5f 100644
--- a/src/test/java/org/springframework/data/jpa/repository/sample/UserRepository.java
+++ b/src/test/java/org/springframework/data/jpa/repository/sample/UserRepository.java
@@ -282,6 +282,11 @@ public interface UserRepository
 	 */
 	int countUsersByFirstname(String firstname);
 
+	/**
+	 * @see DATAJPA-920
+	 */
+	boolean existsByLastname(String lastname);
+
 	/**
 	 * @see DATAJPA-391
 	 */