diff --git a/update.js b/update.js
index 7ec8d0a..92e34d2 100644
--- a/update.js
+++ b/update.js
@@ -20,8 +20,6 @@ export async function update(table, rank, views) {
     await conn.query(`INSERT INTO temp_updates (id, views_count) VALUES ?`, [values])
   }
 
-
-
   for (let name of ['comment', 'praise', 'collect']) {
     console.log(`统计当天时间段内 ${name} 数到临时表`)
     await conn.query(`
@@ -52,11 +50,8 @@ export async function update(table, rank, views) {
       views_count * 25;
   `)
 
-  console.log('更新前清空当日记录')
-  await conn.query(`UPDATE ${table} SET ${rank} = 0`)
-
   console.log('更新数据从临时表转入生产库')
-  await conn.query(`UPDATE ${table} t JOIN temp_updates tu ON t.id = tu.id SET t.${rank} = tu.${rank}`)
+  await conn.query(`UPDATE ${table} t LEFT JOIN temp_updates tu ON t.id = tu.id SET t.${rank} = IFNULL(tu.${rank}, 0)`)
   await conn.end()
   console.log('更新完成')
 }