diff --git a/pagetop-node/Cargo.toml b/pagetop-node/Cargo.toml
index 71412013..b2fa9fec 100644
--- a/pagetop-node/Cargo.toml
+++ b/pagetop-node/Cargo.toml
@@ -13,5 +13,7 @@ homepage = "https://suitepro.cillero.es/projects/pagetop"
 repository = "https://gitlab.com/manuelcillero/pagetop"
 license = "Apache-2.0 or MIT"
 
-[dependencies]
-pagetop = { path = "../pagetop" }
+[dependencies.pagetop]
+path = "../pagetop"
+features = ["database"]
+default-features = false
diff --git a/pagetop-user/Cargo.toml b/pagetop-user/Cargo.toml
index 8781d7ff..01c28e4b 100644
--- a/pagetop-user/Cargo.toml
+++ b/pagetop-user/Cargo.toml
@@ -13,6 +13,10 @@ homepage = "https://suitepro.cillero.es/projects/pagetop"
 repository = "https://gitlab.com/manuelcillero/pagetop"
 license = "Apache-2.0 or MIT"
 
+[dependencies.pagetop]
+path = "../pagetop"
+features = ["database"]
+default-features = false
+
 [dependencies]
-pagetop = { path = "../pagetop" }
 serde = { version = "1.0", features = ["derive"] }
diff --git a/pagetop/Cargo.toml b/pagetop/Cargo.toml
index 9d6034ca..ad3604d4 100644
--- a/pagetop/Cargo.toml
+++ b/pagetop/Cargo.toml
@@ -64,9 +64,10 @@ optional = true
 
 [features]
 default  = []
-mysql    = ["sea-orm", "sea-orm-migration", "sea-orm/sqlx-mysql"]
-postgres = ["sea-orm", "sea-orm-migration", "sea-orm/sqlx-postgres"]
-sqlite   = ["sea-orm", "sea-orm-migration", "sea-orm/sqlx-sqlite"]
+database = ["sea-orm", "sea-orm-migration"]
+mysql    = ["database", "sea-orm/sqlx-mysql"]
+postgres = ["database", "sea-orm/sqlx-postgres"]
+sqlite   = ["database", "sea-orm/sqlx-sqlite"]
 
 [build-dependencies]
 static-files = "0.2.3"
diff --git a/pagetop/STARTER.bin.Cargo.toml b/pagetop/STARTER.bin.Cargo.toml
index 4958aea5..f5d375c4 100644
--- a/pagetop/STARTER.bin.Cargo.toml
+++ b/pagetop/STARTER.bin.Cargo.toml
@@ -8,13 +8,11 @@ edition = "2021"
 
 [dependencies.pagetop]
 path = "../pagetop"
-# Si se usa base de datos:
+# Si requiere base de datos (MySql, Postgres y/o SQLite):
 features = ["mysql"]
 # features = ["postgres"]
 # features = ["sqlite"]
-# Soporte alternativo a todas las bases de datos:
-# features = ["mysql", "postgres", "sqlite"]
-# En estos casos hay que deshabilitar las características predeterminadas:
+# En este caso hay que deshabilitar las características predeterminadas:
 default-features = false
 
 [dependencies]
diff --git a/pagetop/STARTER.lib.Cargo.toml b/pagetop/STARTER.lib.Cargo.toml
index 7c06a7fd..0cdc858a 100644
--- a/pagetop/STARTER.lib.Cargo.toml
+++ b/pagetop/STARTER.lib.Cargo.toml
@@ -6,8 +6,14 @@ edition = "2021"
 # Ver más claves y sus definiciones en
 # https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[dependencies.pagetop]
+path = "../pagetop"
+# Para dar soporte a bases de datos:
+features = ["database"]
+# En este caso hay que deshabilitar las características predeterminadas:
+default-features = false
+
 [dependencies]
-pagetop = { path = "../pagetop" }
 # Si se usa la macro html!:
 maud = { git = "https://github.com/lambda-fairy/maud", rev = "e6787cd6" }
 # Si se requiere serialización de estructuras de datos:
diff --git a/pagetop/src/app.rs b/pagetop/src/app.rs
index 80237c40..0ff72856 100644
--- a/pagetop/src/app.rs
+++ b/pagetop/src/app.rs
@@ -8,7 +8,7 @@ mod tracing;
 
 pub mod locale;
 
-#[cfg(any(feature = "mysql", feature = "postgres", feature = "sqlite"))]
+#[cfg(feature = "database")]
 pub mod db;
 
 mod definition;
diff --git a/pagetop/src/app/application.rs b/pagetop/src/app/application.rs
index aa49adcb..e68a0b95 100644
--- a/pagetop/src/app/application.rs
+++ b/pagetop/src/app/application.rs
@@ -24,7 +24,7 @@ impl Application {
         LazyStatic::force(&super::locale::LANGID);
 
         // Conecta con la base de datos (opcional).
-        #[cfg(any(feature = "mysql", feature = "postgres", feature = "sqlite"))]
+        #[cfg(feature = "database")]
         LazyStatic::force(&super::db::DBCONN);
 
         // Habilita los módulos predeterminados.
@@ -46,7 +46,7 @@ impl Application {
         module::all::register_actions();
 
         // Ejecuta actualizaciones pendientes de la base de datos (opcional).
-        #[cfg(any(feature = "mysql", feature = "postgres", feature = "sqlite"))]
+        #[cfg(feature = "database")]
         module::all::run_migrations();
 
         // Ejecuta la función de inicio de la aplicación.
diff --git a/pagetop/src/core/module/all.rs b/pagetop/src/core/module/all.rs
index 4e6c6282..d0b48655 100644
--- a/pagetop/src/core/module/all.rs
+++ b/pagetop/src/core/module/all.rs
@@ -2,7 +2,7 @@ use super::ModuleTrait;
 use crate::core::hook::add_action;
 use crate::{app, trace, LazyStatic};
 
-#[cfg(any(feature = "mysql", feature = "postgres", feature = "sqlite"))]
+#[cfg(feature = "database")]
 use crate::{db::*, run_now};
 
 use std::sync::RwLock;
@@ -66,7 +66,7 @@ pub fn register_actions() {
     }
 }
 
-#[cfg(any(feature = "mysql", feature = "postgres", feature = "sqlite"))]
+#[cfg(feature = "database")]
 pub fn run_migrations() {
     run_now({
         struct Migrator;
diff --git a/pagetop/src/core/module/definition.rs b/pagetop/src/core/module/definition.rs
index dbf6904e..59aec809 100644
--- a/pagetop/src/core/module/definition.rs
+++ b/pagetop/src/core/module/definition.rs
@@ -1,7 +1,7 @@
 use crate::core::hook::HookAction;
 use crate::{app, util};
 
-#[cfg(any(feature = "mysql", feature = "postgres", feature = "sqlite"))]
+#[cfg(feature = "database")]
 use crate::db::MigrationItem;
 
 pub trait BaseModule {
@@ -31,7 +31,7 @@ pub trait ModuleTrait: BaseModule + Send + Sync {
         vec![]
     }
 
-    #[cfg(any(feature = "mysql", feature = "postgres", feature = "sqlite"))]
+    #[cfg(feature = "database")]
     #[allow(unused_variables)]
     fn migrations(&self) -> Vec<MigrationItem> {
         vec![]
diff --git a/pagetop/src/lib.rs b/pagetop/src/lib.rs
index 5d788104..cfcaf8ad 100644
--- a/pagetop/src/lib.rs
+++ b/pagetop/src/lib.rs
@@ -21,7 +21,7 @@ pub mod locale;
 pub mod html;
 
 // Acceso a base de datos.
-#[cfg(any(feature = "mysql", feature = "postgres", feature = "sqlite"))]
+#[cfg(feature = "database")]
 pub mod db;
 
 // Prepare and run the application.
diff --git a/pagetop/src/prelude.rs b/pagetop/src/prelude.rs
index 20fa3e9d..b1c29c63 100644
--- a/pagetop/src/prelude.rs
+++ b/pagetop/src/prelude.rs
@@ -11,7 +11,7 @@ pub use crate::localize;
 
 pub use crate::html::*;
 
-#[cfg(any(feature = "mysql", feature = "postgres", feature = "sqlite"))]
+#[cfg(feature = "database")]
 pub use crate::{db, db::*, migration_item, pub_migration};
 
 pub use crate::app;