diff --git a/db/deno.json b/db/deno.json
index e6911ea..331295c 100644
--- a/db/deno.json
+++ b/db/deno.json
@@ -4,7 +4,7 @@
     "@std/assert": "jsr:@std/assert@^1.0.19"
   },
   "name": "@01edu/db",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "license": "MIT",
   "exports": {
     ".": "./mod.ts",
diff --git a/db/entries.ts b/db/entries.ts
index b483b55..ec010d5 100644
--- a/db/entries.ts
+++ b/db/entries.ts
@@ -257,6 +257,14 @@ export const initEntries = <
             [name]: { type },
           })
 
+          // SQLite only auto-indexes primary keys. fieldId is the PK, so entryId
+          // needs an explicit index — without it any partial index on entryInternal
+          // triggers a full table scan of the field table on every join.
+          sql`
+            CREATE INDEX IF NOT EXISTS idx_${tableName}_entry_id
+            ON ${tableName}(entryId)
+          `.run()
+
           fieldTables[name] = table
           fields[name] = table
         }