diff --git a/backend/apps/db/constant.py b/backend/apps/db/constant.py
new file mode 100644
index 0000000..c4de1cd
--- /dev/null
+++ b/backend/apps/db/constant.py
@@ -0,0 +1,37 @@
+# Author: Junjun
+# Date: 2025/7/16
+
+from enum import Enum
+
+
+class ConnectType(Enum):
+    sqlalchemy = ('sqlalchemy')
+    py_driver = ('py_driver')
+
+    def __init__(self, type_name):
+        self.type_name = type_name
+
+
+class DB(Enum):
+    mysql = ('mysql', '`', '`', ConnectType.sqlalchemy)
+    sqlServer = ('sqlServer', '[', ']', ConnectType.sqlalchemy)
+    pg = ('pg', '"', '"', ConnectType.sqlalchemy)
+    excel = ('excel', '"', '"', ConnectType.sqlalchemy)
+    oracle = ('oracle', '"', '"', ConnectType.sqlalchemy)
+    ck = ('ck', '"', '"', ConnectType.sqlalchemy)
+    dm = ('dm', '"', '"', ConnectType.py_driver)
+    doris = ('doris', '`', '`', ConnectType.py_driver)
+    redshift = ('redshift', '"', '"', ConnectType.py_driver)
+
+    def __init__(self, type, prefix, suffix, connect_type: ConnectType):
+        self.type = type
+        self.prefix = prefix
+        self.suffix = suffix
+        self.connect_type = connect_type
+
+    @classmethod
+    def get_db(cls, type):
+        for db in cls:
+            if db.type == type:
+                return db
+        raise ValueError(f"Invalid db type: {type}")