diff --git a/django/db/backends/oracle/creation.py b/django/db/backends/oracle/creation.py
index 0b0c1702ec..75cc6852d9 100644
--- a/django/db/backends/oracle/creation.py
+++ b/django/db/backends/oracle/creation.py
@@ -1,26 +1,26 @@
 DATA_TYPES = {
-    'AutoField':                    'number(38)',
-    'BooleanField':                 'number(1)',
+    'AutoField':                    'number(11)',
+    'BooleanField':                 'number(1) CHECK (%(column)s IN (0,1))',
     'CharField':                    'varchar2(%(maxlength)s)',
     'CommaSeparatedIntegerField':   'varchar2(%(maxlength)s)',
     'DateField':                    'date',
-    'DateTimeField':                'date',
+    'DateTimeField':                'timestamp with time zone',
     'FileField':                    'varchar2(100)',
     'FilePathField':                'varchar2(100)',
     'FloatField':                   'number(%(max_digits)s, %(decimal_places)s)',
     'ImageField':                   'varchar2(100)',
-    'IntegerField':                 'integer',
+    'IntegerField':                 'number(11)',
     'IPAddressField':               'char(15)',
     'ManyToManyField':              None,
-    'NullBooleanField':             'integer',
-    'OneToOneField':                'integer',
-    'PhoneNumberField':             'varchar(20)',
-    'PositiveIntegerField':         'integer',
-    'PositiveSmallIntegerField':    'smallint',
-    'SlugField':                    'varchar(50)',
-    'SmallIntegerField':            'smallint',
+    'NullBooleanField':             'number(1) CHECK ((%(column)s IN (0,1)) OR (%(column)s IS NULL))',
+    'OneToOneField':                'number(11)',
+    'PhoneNumberField':             'varchar2(20)',
+    'PositiveIntegerField':         'number(11) CHECK (%(column)s >= 0)',
+    'PositiveSmallIntegerField':    'number(11) CHECK (%(column)s >= 0)',
+    'SlugField':                    'varchar2(50)',
+    'SmallIntegerField':            'number(11)',
     'TextField':                    'clob',
     'TimeField':                    'timestamp',
-    'URLField':                     'varchar(200)',
-    'USStateField':                 'varchar(2)',
+    'URLField':                     'varchar2(200)',
+    'USStateField':                 'char(2)',
 }