diff --git a/lib/core/settings.py b/lib/core/settings.py
index 4b10492e6..2e6d131eb 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -18,7 +18,7 @@ from lib.core.enums import OS
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.4.7.18"
+VERSION = "1.4.7.19"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)
diff --git a/tamper/0eunion.py b/tamper/0eunion.py
new file mode 100644
index 000000000..b46f381e2
--- /dev/null
+++ b/tamper/0eunion.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+
+"""
+Copyright (c) 2006-2020 sqlmap developers (http://sqlmap.org/)
+See the file 'LICENSE' for copying permission
+"""
+
+import re
+
+from lib.core.enums import PRIORITY
+
+__priority__ = PRIORITY.HIGHEST
+
+def dependencies():
+    pass
+
+def tamper(payload, **kwargs):
+    """
+    Replaces instances of <int> UNION with <int>e0UNION
+
+    Requirement:
+        * MySQL
+        * MsSQL
+
+    Notes:
+        * Reference: https://media.blackhat.com/us-13/US-13-Salgado-SQLi-Optimization-and-Obfuscation-Techniques-Slides.pdf
+
+    >>> tamper('1 UNION ALL SELECT')
+    '1e0UNION ALL SELECT'
+    """
+
+    return re.sub("(\d+)\s+(UNION )", r"\g<1>e0\g<2>", payload, re.I) if payload else payload
diff --git a/tamper/dunion.py b/tamper/dunion.py
new file mode 100644
index 000000000..9d32b6647
--- /dev/null
+++ b/tamper/dunion.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+
+"""
+Copyright (c) 2006-2020 sqlmap developers (http://sqlmap.org/)
+See the file 'LICENSE' for copying permission
+"""
+
+import re
+
+from lib.core.enums import PRIORITY
+
+__priority__ = PRIORITY.HIGHEST
+
+def dependencies():
+    pass
+
+def tamper(payload, **kwargs):
+    """
+    Replaces instances of <int> UNION with <int>DUNION
+
+    Requirement:
+        * Oracle
+
+    Notes:
+        * Reference: https://media.blackhat.com/us-13/US-13-Salgado-SQLi-Optimization-and-Obfuscation-Techniques-Slides.pdf
+
+    >>> tamper('1 UNION ALL SELECT')
+    '1DUNION ALL SELECT'
+    """
+
+    return re.sub("(\d+)\s+(UNION )", r"\g<1>D\g<2>", payload, re.I) if payload else payload
diff --git a/tamper/schemasplit.py b/tamper/schemasplit.py
new file mode 100644
index 000000000..243f14076
--- /dev/null
+++ b/tamper/schemasplit.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+
+"""
+Copyright (c) 2006-2020 sqlmap developers (http://sqlmap.org/)
+See the file 'LICENSE' for copying permission
+"""
+
+import re
+
+from lib.core.enums import PRIORITY
+
+__priority__ = PRIORITY.HIGHEST
+
+def dependencies():
+    pass
+
+def tamper(payload, **kwargs):
+    """
+    Replaces instances of <int> UNION with <int>e0UNION
+
+    Requirement:
+        * MySQL
+
+    Notes:
+        * Reference: https://media.blackhat.com/us-13/US-13-Salgado-SQLi-Optimization-and-Obfuscation-Techniques-Slides.pdf
+
+    >>> tamper('SELECT id FROM testdb.users')
+    'SELECT id FROM testdb 9.e.users'
+    """
+
+    return re.sub("( FROM \w+)\.(\w+)", r"\g<1> 9.e.\g<2>", payload, re.I) if payload else payload