diff --git a/server/web3dbspider/services/dbevent_process.js b/server/web3dbspider/services/dbevent_process.js
index a204d84..e836a4b 100644
--- a/server/web3dbspider/services/dbevent_process.js
+++ b/server/web3dbspider/services/dbevent_process.js
@@ -79,7 +79,7 @@ class DbEventProcess extends BaseService {
         return;
       }
       const {err, rows} = await this.conn.execQuery(
-        'SELECT * FROM ${tableName} WHERE `idx` > ? AND `idx` <= ? ' +
+        `SELECT * FROM ${tableName} WHERE idx > ? AND idx <= ? ` +
           'AND net_id = ? AND event_name = ? AND contract_address = ? AND ' +
           'status = ' + constant.EVENTDB_STATE_PENDING + ' ' +
           'LIMIT ' + LIMIT_COUNT,