我的問題發(fā)生如下：我使用mysqldb的API，如下代碼： conn = MySQLdb.connect(host='192.168.1.16', user='henry', passwd='password', db='test', charset='utf8') cur = conn.cursor()沒關系，connect mysql成功，并且與此配合良好：select count(*) from songs;   everthing is allright.但是，如果我像這樣使用sql：select * from songs;錯誤是：connect mysqldb error. the songs table has 5000000 rows.