diff --git a/tests/connections/providers/oracle/test_statement_execution.py b/tests/connections/providers/oracle/test_statement_execution.py
new file mode 100644
index 0000000..73eda73
--- /dev/null
+++ b/tests/connections/providers/oracle/test_statement_execution.py
@@ -0,0 +1,77 @@
+"""Oracle-specific statement execution behavior."""
+
+from __future__ import annotations
+
+from unittest.mock import MagicMock
+
+import pytest
+
+from sqlit.domains.connections.providers.oracle.adapter import OracleAdapter
+
+
+@pytest.fixture
+def adapter() -> OracleAdapter:
+    return OracleAdapter()
+
+
+@pytest.fixture
+def mock_conn() -> MagicMock:
+    conn = MagicMock()
+    cursor = conn.cursor.return_value
+    cursor.description = None
+    cursor.rowcount = 0
+    return conn
+
+
+@pytest.mark.parametrize(
+    ("query", "expected"),
+    [
+        ("SELECT ';' AS value FROM DUAL;", "SELECT ';' AS value FROM DUAL"),
+        ("SELECT 1 FROM DUAL;  \n", "SELECT 1 FROM DUAL"),
+        ("SELECT 1 FROM DUAL", "SELECT 1 FROM DUAL"),
+    ],
+)
+def test_execute_query_removes_sql_statement_terminator(
+    adapter: OracleAdapter,
+    mock_conn: MagicMock,
+    query: str,
+    expected: str,
+) -> None:
+    """python-oracledb rejects SQL statements ending in a semicolon."""
+    adapter.execute_query(mock_conn, query)
+
+    mock_conn.cursor.return_value.execute.assert_called_once_with(expected)
+
+
+def test_execute_non_query_removes_sql_statement_terminator(
+    adapter: OracleAdapter,
+    mock_conn: MagicMock,
+) -> None:
+    """Issue #260: ALTER SESSION must reach python-oracledb without ``;``."""
+    adapter.execute_non_query(mock_conn, "ALTER SESSION SET EDITION = V0;")
+
+    mock_conn.cursor.return_value.execute.assert_called_once_with("ALTER SESSION SET EDITION = V0")
+
+
+@pytest.mark.parametrize(
+    "statement",
+    [
+        "BEGIN NULL; END;",
+        "DECLARE value NUMBER := 1; BEGIN NULL; END;",
+        "CREATE OR REPLACE PROCEDURE p AS BEGIN NULL; END;",
+        "-- setup\nBEGIN NULL; END;",
+        "/* setup */ CREATE OR REPLACE EDITIONABLE FUNCTION f RETURN NUMBER "
+        "AS BEGIN RETURN 1; END;",
+        "CREATE OR REPLACE TYPE BODY t AS MEMBER PROCEDURE p IS "
+        "BEGIN NULL; END; END;",
+    ],
+)
+def test_execute_non_query_preserves_plsql_terminator(
+    adapter: OracleAdapter,
+    mock_conn: MagicMock,
+    statement: str,
+) -> None:
+    """The final semicolon is part of PL/SQL syntax, not a client terminator."""
+    adapter.execute_non_query(mock_conn, statement)
+
+    mock_conn.cursor.return_value.execute.assert_called_once_with(statement)