diff --git a/README.md b/README.md
index 75cf8c0..abbebcd 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@ Only one:
 
 ```python
 fiable_db.add({"name": "Miguel", "age": 41, "height": 189})
-# {"id": 1, "rev": 1, "data": {"name": "Miguel", "age": 41, "height": 189}}
+# {"id": 1, "rev": 1, "table": "default", "data": {"name": "Miguel", "age": 41, "height": 189}}
 ```
 
 Various:
@@ -67,9 +67,9 @@ fiable_db.add(
     ]
 )
 # [
-#     {"id": 2, "rev": 1, "data": {"name": "Noelia", "age": 34, "height": 165}},
-#     {"id": 3, "rev": 1, "data": {"name": "Juan", "age": 41, "height": 187}},
-#     {"id": 4, "rev": 1, "data": {"name": "Valentina", "age": 12, "height": 142}},
+#     {"id": 2, "rev": 1, "table": "default", "data": {"name": "Noelia", "age": 34, "height": 165}},
+#     {"id": 3, "rev": 1, "table": "default", "data": {"name": "Juan", "age": 41, "height": 187}},
+#     {"id": 4, "rev": 1, "table": "default", "data": {"name": "Valentina", "age": 12, "height": 142}},
 # ]
 ```
 
@@ -79,28 +79,28 @@ Update a key:
 
 ```python
 fiable_db.update(4, {"age": 21})
-# {"id": 4, "rev": 2, "data": {"name": "Valentina", "age": 21, "height": 172}}
+# {"id": 4, "rev": 2, "table": "default", "data": {"name": "Valentina", "age": 21, "height": 172}}
 ```
 
 If the key does not exist, it will be added:
 
 ```python
 fiable_db.update(4, {"is_active": True})
-# {"id": 4, "rev": 3, "data": {"name": "Valentina", "age": 21, "height": 172, "is_active": True}}
+# {"id": 4, "rev": 3, "table": "default", "data": {"name": "Valentina", "age": 21, "height": 172, "is_active": True}}
 ```
 
 To delete a key you only have to give it a value `None`.
 
 ```python
 fiable_db.update(4, {"height": None})
-# {"id": 4, "rev": 4, "data": {"name": "Valentina", "age": 21, "is_active": True}}
+# {"id": 4, "rev": 4, "table": "default", "data": {"name": "Valentina", "age": 21, "is_active": True}}
 ```
 
 To overwrite the dictionary, use the `force=True`:
 
 ```python
 fiable_db.update(4, {"name": "Javier", "email": "foo@example.com"}, force=True)
-# {"id": 4, "rev": 5, "data": {"name": "Javier", "email": "foo@example.com"}}
+# {"id": 4, "rev": 5, "table": "default", "data": {"name": "Javier", "email": "foo@example.com"}}
 ```
 
 ### Step 4: Delete
@@ -109,14 +109,14 @@ You can be specific by using the `id`.
 
 ```python
 fiable_db.delete(id=4)
-# {"id": 4, "rev": 6, "data": None}
+# {"id": 4, "rev": 6, "table": "default", "data": None}
 ```
 
 And you can delete by performing a search for their values:
 
 ```python
 fiable_db.delete(data={"name": "Javier"})
-# {"id": 4, "rev": 6, "data": None}
+# {"id": 4, "rev": 6, "table": "default", "data": None}
 ```
 
 ### Step 5: Find one
@@ -125,21 +125,21 @@ Search by id.
 
 ```python
 fiable_db.find_one(id=2)
-# {"id": 2, "rev": 1, "data": {"name": "Noelia", "age": 34, "height": 165}}
+# {"id": 2, "rev": 1, "table": "default", "data": {"name": "Noelia", "age": 34, "height": 165}}
 ```
 
 Search by value. It will give you the first match.
 
 ```python
 fiable_db.find_one(data={"name": "Noelia"})
-# {"id": 2, "rev": 1, "data": {"name": "Noelia", "age": 34, "height": 165}}
+# {"id": 2, "rev": 1, "table": "default", "data": {"name": "Noelia", "age": 34, "height": 165}}
 ```
 
 Search by several values.
 
 ```python
 fiable_db.find_one(data={"name": "Noelia", "age": 34})
-# {"id": 2, "rev": 1, "data": {"name": "Noelia", "age": 34, "height": 165}}
+# {"id": 2, "rev": 1, "table": "default", "data": {"name": "Noelia", "age": 34, "height": 165}}
 ```
 
 If there are no results it will return a None.
@@ -155,8 +155,8 @@ fiable_db.find_one(data={"name": "Noelia", "is_active": False})
 ```python
 fiable_db.find_all(data={"age": 41})
 # [
-#      {"id": 1, "rev": 1, "data": {"name": "Miguel", "age": 41, "height": 189}},
-#      {"id": 3, "rev": 1, "data": {"name": "Juan", "age": 41, "height": 187}},
+#      {"id": 1, "rev": 1, "table": "default", "data": {"name": "Miguel", "age": 41, "height": 189}},
+#      {"id": 3, "rev": 1, "table": "default", "data": {"name": "Juan", "age": 41, "height": 187}},
 # ]
 ```
 
@@ -175,17 +175,17 @@ Example: Previous version to be deleted.
 
 ```python
 fiable_db.find_one(id=4, rev=3)
-# {"id": 4, "rev": 3, "data": {"name": "Valentina", "age": 21, "height": 172, "is_active": True}}
+# {"id": 4, "rev": 3, "table": "default", "data": {"name": "Valentina", "age": 21, "height": 172, "is_active": True}}
 ```
 
 For convenience, you can use negative numbers. `-1` will be the previous state, `-2` is 2 states back, etc.
 
 ```python
 fiable_db.find_one(id=4, rev=-1)
-# {"id": 4, "rev": 3, "data": {"name": "Valentina", "age": 21, "height": 172, "is_active": True}}
+# {"id": 4, "rev": 3, "table": "default", "data": {"name": "Valentina", "age": 21, "height": 172, "is_active": True}}
 
 fiable_db.find_one(id=4, rev=-2)
-# {"id": 4, "rev": 2, "data": {"name": "Valentina", "age": 21, "height": 172}}
+# {"id": 4, "rev": 2, "table": "default", "data": {"name": "Valentina", "age": 21, "height": 172}}
 ```
 
 ### Step 8: Working with tables or collections.
@@ -194,13 +194,25 @@ You can create as many tables as you want. The default table is called `default`
 
 ```python
 fiable_db.add({"name": "Luciano", "age": 54, "height": 165}, table="users")
-# {"id": 1, "rev": 1, "data": {"name": "Luciano", "age": 54, "height": 165}}
+# {"id": 1, "rev": 1, "table": "users", "data": {"name": "Luciano", "age": 54, "height": 165}}
 
 fiable_db.find_one(id=1, table="users") # "users" table
-# {"id": 1, "rev": 1, "data": {"name": "Luciano", "age": 54, "height": 165}}
+# {"id": 1, "rev": 1, "table": "users", "data": {"name": "Luciano", "age": 54, "height": 165}}
 
 fiable_db.find_one(id=1) # Default table
-# {"id": 1, "rev": 1, "data": {"name": "Miguel", "age": 41, "height": 189}}
+# {"id": 1, "rev": 1, "table": "default", "data": {"name": "Miguel", "age": 41, "height": 189}}
+```
+
+You can use the `table` parameter with any function.
+
+```python
+fiable_db.update(1, {"age", 10}, table="users")
+# {"id": 1, "rev": 2, "table": "users", "data": {"name": "Luciano", "age": 10, "height": 165}}
+
+fiable_db.delete(1, table="users")
+# {"id": 1, "rev": 3, "table": "users", "data": {"name": "Luciano", "age": 10, "height": 165}}
+
+fiable_db.find_all(id=1, table="users")
 ```
 
 ### Step 9: Save changes
diff --git a/fiable_db.py b/fiable_db.py
index 3d23434..81df04b 100644
--- a/fiable_db.py
+++ b/fiable_db.py
@@ -1,4 +1,5 @@
 from typing import Dict, Tuple, Union, Sequence, TypedDict
+from functools import reduce
 import json
 from os import path
 
@@ -27,9 +28,18 @@ Type_Find_All_Return = Tuple[Type_Find_One_Return]
 
 
 def get_next_id(table: str = "default") -> int:
-    """Get the next id for a table"""
+    """Get the next id for the table"""
     global database
-    return database[-1]["id"] + 1 if database else 1
+
+    # Get the last id for the table
+    def get_id(current_id, row: TypeData) -> int:
+        if current_id == None and table == row["table"]:
+            return row["id"]
+        else:
+            return current_id
+    last_id = reduce(get_id, database[::-1], None)
+    # Return the next id, or 1 if there is no last id
+    return last_id + 1 if last_id else 1
 
 
 def start(file_name: str = "") -> str:
diff --git a/test/test_add.py b/test/test_add.py
index 9f5b260..fa1d125 100644
--- a/test/test_add.py
+++ b/test/test_add.py
@@ -73,5 +73,28 @@ def test_add_in_table_foo():
         {"id": 4, "rev": 1, "table": "default", "data": {"name": "John", "age": 12}},
         {"id": 5, "rev": 1, "table": "default", "data": {"name": "Jane", "age": 34}},
         {"id": 6, "rev": 1, "table": "default", "data": {"name": "John", "age": 42}},
-        {"id": 7, "rev": 1, "table": "foo", "data": {"name": "John", "age": 42}},
+        {"id": 1, "rev": 1, "table": "foo", "data": {"name": "John", "age": 42}},
+    ]
+    add({"name": "Simone", "age": 33}, table="foo")
+    assert get_database() == [
+        {"id": 1, "rev": 1, "table": "default", "data": {"name": "John", "age": 42}},
+        {"id": 2, "rev": 1, "table": "default", "data": {"name": "John", "age": 12}},
+        {"id": 3, "rev": 1, "table": "default", "data": {"name": "Jane", "age": 34}},
+        {"id": 4, "rev": 1, "table": "default", "data": {"name": "John", "age": 12}},
+        {"id": 5, "rev": 1, "table": "default", "data": {"name": "Jane", "age": 34}},
+        {"id": 6, "rev": 1, "table": "default", "data": {"name": "John", "age": 42}},
+        {"id": 1, "rev": 1, "table": "foo", "data": {"name": "John", "age": 42}},
+        {"id": 2, "rev": 1, "table": "foo", "data": {"name": "Simone", "age": 33}},
+    ]
+    add({"name": "Jose", "age": 25})
+    assert get_database() == [
+        {"id": 1, "rev": 1, "table": "default", "data": {"name": "John", "age": 42}},
+        {"id": 2, "rev": 1, "table": "default", "data": {"name": "John", "age": 12}},
+        {"id": 3, "rev": 1, "table": "default", "data": {"name": "Jane", "age": 34}},
+        {"id": 4, "rev": 1, "table": "default", "data": {"name": "John", "age": 12}},
+        {"id": 5, "rev": 1, "table": "default", "data": {"name": "Jane", "age": 34}},
+        {"id": 6, "rev": 1, "table": "default", "data": {"name": "John", "age": 42}},
+        {"id": 1, "rev": 1, "table": "foo", "data": {"name": "John", "age": 42}},
+        {"id": 2, "rev": 1, "table": "foo", "data": {"name": "Simone", "age": 33}},
+        {"id": 7, "rev": 1, "table": "default", "data": {"name": "Jose", "age": 25}},
     ]