diff --git a/docs/uniCloud/cf-database-dbcmd.md b/docs/uniCloud/cf-database-dbcmd.md
index 9fdc25c56cdc78e7e63a9d6e27cce13ba1333086..bc519b1827295e34e295175ad580fb02d1ff36ce 100644
--- a/docs/uniCloud/cf-database-dbcmd.md
+++ b/docs/uniCloud/cf-database-dbcmd.md
@@ -98,8 +98,8 @@ function and(...expressions: Expression[]): Command
 
  
 ```js
-let res = await const dbCmd = db.command
-db.collection('todo').where({
+const dbCmd = db.command
+let res = await db.collection('todo').where({
   progress: dbCmd.gt(80).or(dbCmd.lt(20))
 }).get()
 ```