Fixed #34070 -- Added subsecond support to Now() on SQLite and MySQL.

django/db/backends/mysql/features.py

@@ -81,7 +81,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
             "swedish_ci": f"{charset}_swedish_ci",
         }
 
-    test_now_utc_template = "UTC_TIMESTAMP"
+    test_now_utc_template = "UTC_TIMESTAMP(6)"
 
     @cached_property
     def django_test_skips(self):

django/db/models/functions/datetime.py

@@ -223,6 +223,19 @@ class Now(Func):
             compiler, connection, template="STATEMENT_TIMESTAMP()", **extra_context
         )
 
+    def as_mysql(self, compiler, connection, **extra_context):
+        return self.as_sql(
+            compiler, connection, template="CURRENT_TIMESTAMP(6)", **extra_context
+        )
+
+    def as_sqlite(self, compiler, connection, **extra_context):
+        return self.as_sql(
+            compiler,
+            connection,
+            template="STRFTIME('%%Y-%%m-%%d %%H:%%M:%%f', 'NOW')",
+            **extra_context,
+        )
+
 
 class TruncBase(TimezoneMixin, Transform):
     kind = None