diff --git a/mylib/db.py b/mylib/db.py
index d0dc3c7..efc8001 100644
--- a/mylib/db.py
+++ b/mylib/db.py
@@ -192,6 +192,17 @@ class DB:
             params[param] = value
         return params
 
+    @staticmethod
+    def _get_unique_param_name(field, params):
+        """Return a unique parameter name based on specified field name"""
+        param = field
+        if field in params:
+            idx = 1
+            while param in params:
+                param = f"{field}_{idx}"
+                idx += 1
+        return param
+
     @classmethod
     def _format_where_clauses(cls, where_clauses, params=None, where_op=None):
         """
@@ -237,16 +248,22 @@ class DB:
         if isinstance(where_clauses, dict):
             sql_where_clauses = []
             for field, value in where_clauses.items():
-                param = field
-                if field in params:
-                    idx = 1
-                    while param in params:
-                        param = f"{field}_{idx}"
-                        idx += 1
-                cls._combine_params(params, {param: value})
-                sql_where_clauses.append(
-                    f"{cls._quote_field_name(field)} = {cls.format_param(param)}"
-                )
+                if isinstance(value, list):
+                    param_names = []
+                    for idx, v in enumerate(value):
+                        param = cls._get_unique_param_name(f"{field}_{idx}", params)
+                        cls._combine_params(params, **{param: v})
+                        param_names.append(param)
+                    sql_where_clauses.append(
+                        f"{cls._quote_field_name(field)} IN "
+                        f"({', '.join([cls.format_param(param) for param in param_names])})"
+                    )
+                else:
+                    param = cls._get_unique_param_name(field, params)
+                    cls._combine_params(params, **{param: value})
+                    sql_where_clauses.append(
+                        f"{cls._quote_field_name(field)} = {cls.format_param(param)}"
+                    )
             return (f" {where_op} ".join(sql_where_clauses), params)
         raise DBUnsupportedWHEREClauses(where_clauses)
 
diff --git a/tests/test_mysql.py b/tests/test_mysql.py
index 2cd17db..14c2dc4 100644
--- a/tests/test_mysql.py
+++ b/tests/test_mysql.py
@@ -234,6 +234,13 @@ def test_format_where_clauses_tuple_clause_with_params():
     assert MyDB._format_where_clauses(where_clauses) == where_clauses
 
 
+def test_format_where_clauses_with_list_as_value():
+    assert MyDB._format_where_clauses({"test": [1, 2]}) == (
+        "`test` IN (%(test_0)s, %(test_1)s)",
+        {"test_0": 1, "test_1": 2},
+    )
+
+
 def test_format_where_clauses_dict():
     where_clauses = {"test1": 1, "test2": 2}
     assert MyDB._format_where_clauses(where_clauses) == (
diff --git a/tests/test_oracle.py b/tests/test_oracle.py
index 99081ec..fdf8bc6 100644
--- a/tests/test_oracle.py
+++ b/tests/test_oracle.py
@@ -226,6 +226,13 @@ def test_format_where_clauses_tuple_clause_with_params():
     assert OracleDB._format_where_clauses(where_clauses) == where_clauses
 
 
+def test_format_where_clauses_with_list_as_value():
+    assert OracleDB._format_where_clauses({"test": [1, 2]}) == (
+        '"test" IN (:test_0, :test_1)',
+        {"test_0": 1, "test_1": 2},
+    )
+
+
 def test_format_where_clauses_dict():
     where_clauses = {"test1": 1, "test2": 2}
     assert OracleDB._format_where_clauses(where_clauses) == (
diff --git a/tests/test_pgsql.py b/tests/test_pgsql.py
index d31cd4f..dabdc80 100644
--- a/tests/test_pgsql.py
+++ b/tests/test_pgsql.py
@@ -226,6 +226,13 @@ def test_format_where_clauses_tuple_clause_with_params():
     assert PgDB._format_where_clauses(where_clauses) == where_clauses
 
 
+def test_format_where_clauses_with_list_as_value():
+    assert PgDB._format_where_clauses({"test": [1, 2]}) == (
+        '"test" IN (%(test_0)s, %(test_1)s)',
+        {"test_0": 1, "test_1": 2},
+    )
+
+
 def test_format_where_clauses_dict():
     where_clauses = {"test1": 1, "test2": 2}
     assert PgDB._format_where_clauses(where_clauses) == (