diff --git a/README.md b/README.md
index a0465f2..1a29750 100644
--- a/README.md
+++ b/README.md
@@ -293,6 +293,16 @@ how it works:
                 firstTable,
                 DynamicTableModel.class);
 ```
+ - limit and offset
+```java
+    ormQueryFactory.selectCache().findOne(ormQueryFactory
+                        .buildQuery()
+                        .from(firstTable).limit(3).offset(3)
+                        .where(firstTable.getNumberColumnByName("newColumn").eq(122)),
+                firstTable,
+                DynamicTableModel.class);
+```
+
   - get column value from model
 ```java
                String testStringColumnValue = firstTableFromDatabase.getValue("TestStringColumn", String.class);
diff --git a/dynamic-orm-core/src/main/java/com/github/vzakharchenko/dynamic/orm/core/predicate/PredicateFactory.java b/dynamic-orm-core/src/main/java/com/github/vzakharchenko/dynamic/orm/core/predicate/PredicateFactory.java
index 9cf7596..f1735b0 100644
--- a/dynamic-orm-core/src/main/java/com/github/vzakharchenko/dynamic/orm/core/predicate/PredicateFactory.java
+++ b/dynamic-orm-core/src/main/java/com/github/vzakharchenko/dynamic/orm/core/predicate/PredicateFactory.java
@@ -1,11 +1,11 @@
 package com.github.vzakharchenko.dynamic.orm.core.predicate;
 
-import com.querydsl.core.types.*;
+import com.querydsl.core.types.Expression;
+import com.querydsl.core.types.Ops;
+import com.querydsl.core.types.Predicate;
 import com.querydsl.core.types.dsl.BooleanExpression;
 import com.querydsl.core.types.dsl.Expressions;
 
-import java.util.Objects;
-
 /**
  * Created with IntelliJ IDEA.
  * User: vassio
diff --git a/dynamic-orm-core/src/test/java/com/github/vzakharchenko/dynamic/orm/core/CrudTest.java b/dynamic-orm-core/src/test/java/com/github/vzakharchenko/dynamic/orm/core/CrudTest.java
index 3aedd66..2fc210d 100644
--- a/dynamic-orm-core/src/test/java/com/github/vzakharchenko/dynamic/orm/core/CrudTest.java
+++ b/dynamic-orm-core/src/test/java/com/github/vzakharchenko/dynamic/orm/core/CrudTest.java
@@ -133,4 +133,30 @@ public void testUpdatePartWhereWithoutPrimaryKey() {
         assertEquals(tableModel2.getValue("TestColumn", String.class), "newValue");
     }
 
+
+    @Test
+    public void testDeleteWithoutPrimaryKey() {
+
+        qDynamicTableFactory.buildTables("DynamicTable2")
+                .addColumns()
+                .addDateTimeColumn("modificationTime").notNull().create()
+                .addStringColumn("TestColumn").size(255).create()
+                .finish()
+                .addVersionColumn("modificationTime")
+                .finish()
+                .buildSchema();
+
+        QDynamicTable dynamicTable = qDynamicTableFactory.getQDynamicTableByName("DynamicTable2");
+        DynamicTableModel dynamicTableModel = new DynamicTableModel(dynamicTable);
+        dynamicTableModel.addColumnValue("TestColumn", "testData");
+        ormQueryFactory.insert(dynamicTableModel);
+        ormQueryFactory.modify(dynamicTable, DynamicTableModel.class)
+                .delete(dynamicTableModel).delete();
+
+        DynamicTableModel tableModel2 = ormQueryFactory.select().findOne(ormQueryFactory.buildQuery(), dynamicTable, DynamicTableModel.class);
+        assertNull(tableModel2);
+    }
+
+
+
 }
diff --git a/dynamic-orm-core/src/test/java/com/github/vzakharchenko/dynamic/orm/core/SelectTest.java b/dynamic-orm-core/src/test/java/com/github/vzakharchenko/dynamic/orm/core/SelectTest.java
index 94ba986..5556050 100644
--- a/dynamic-orm-core/src/test/java/com/github/vzakharchenko/dynamic/orm/core/SelectTest.java
+++ b/dynamic-orm-core/src/test/java/com/github/vzakharchenko/dynamic/orm/core/SelectTest.java
@@ -4,6 +4,7 @@
 import com.github.vzakharchenko.dynamic.orm.core.dynamic.QDynamicTable;
 import com.github.vzakharchenko.dynamic.orm.core.dynamic.dml.DynamicTableModel;
 import com.github.vzakharchenko.dynamic.orm.core.pk.PrimaryKeyGenerators;
+import com.github.vzakharchenko.dynamic.orm.core.predicate.PredicateFactory;
 import com.github.vzakharchenko.dynamic.orm.model.TestTableVersionAnnotation;
 import com.github.vzakharchenko.dynamic.orm.qModel.QTestTableVersionAnnotation;
 import org.testng.annotations.BeforeMethod;
@@ -72,10 +73,15 @@ public void limitOffsetTest() {
         TestTableVersionAnnotation value5 = new TestTableVersionAnnotation();
         ormQueryFactory.insert(value1, value2, value3, value4, value5);
 
-        List<TestTableVersionAnnotation> limit = ormQueryFactory.select().findAll(ormQueryFactory.buildQuery().limit(3), TestTableVersionAnnotation.class);
-        assertEquals(limit.size(), 3);
+        List<TestTableVersionAnnotation> limit = ormQueryFactory.select()
+                .findAll(ormQueryFactory.buildQuery().limit(3),
+                        TestTableVersionAnnotation.class);
+
+        List<TestTableVersionAnnotation> offset = ormQueryFactory.select()
+                .findAll(ormQueryFactory.buildQuery().limit(3).offset(3),
+                        TestTableVersionAnnotation.class);
 
-        List<TestTableVersionAnnotation> offset = ormQueryFactory.select().findAll(ormQueryFactory.buildQuery().limit(3).offset(3), TestTableVersionAnnotation.class);
+        assertEquals(limit.size(), 3);
         assertEquals(offset.size(), 2);
 
 
@@ -88,6 +94,39 @@ private DynamicTableModel createDynamicModel(String testColumn) {
         return dynamicTableModel;
     }
 
+    @Test
+    public void alwaysFalseQuery() {
+        QDynamicTable dynamicTable = qDynamicTableFactory.getQDynamicTableByName("DynamicTable");
+        DynamicTableModel value1 = createDynamicModel("1");
+        DynamicTableModel value2 = createDynamicModel("2");
+        DynamicTableModel value3 = createDynamicModel("3");
+        DynamicTableModel value4 = createDynamicModel("4");
+        DynamicTableModel value5 = createDynamicModel("5");
+        PredicateFactory.alwaysFalsePredicate();
+
+        assertTrue(ormQueryFactory.select().notExist(ormQueryFactory
+                .buildQuery()
+                .from(dynamicTable)
+                .where(PredicateFactory.alwaysFalsePredicate())));
+
+    }
+    @Test
+    public void wrapWhere() {
+        QDynamicTable dynamicTable = qDynamicTableFactory.getQDynamicTableByName("DynamicTable");
+        DynamicTableModel value1 = createDynamicModel("1");
+        DynamicTableModel value2 = createDynamicModel("2");
+        DynamicTableModel value3 = createDynamicModel("3");
+        DynamicTableModel value4 = createDynamicModel("4");
+        DynamicTableModel value5 = createDynamicModel("5");
+        PredicateFactory.alwaysFalsePredicate();
+
+        assertTrue(ormQueryFactory.select().notExist(ormQueryFactory
+                .buildQuery()
+                .from(dynamicTable)
+                .where(PredicateFactory
+                        .wrapPredicate(PredicateFactory.alwaysFalsePredicate().and(dynamicTable.getStringColumnByName("TestColumn").isNotNull())))));
+
+    }
     @Test
     public void limitOffsetDynamicTest() {
 
@@ -105,7 +144,7 @@ public void limitOffsetDynamicTest() {
 
         List<DynamicTableModel> offset = ormQueryFactory.select().findAll(ormQueryFactory.buildQuery().limit(3).offset(3), dynamicTable, DynamicTableModel.class);
         assertEquals(offset.size(), 2);
+    }
 
 
-    }
 }