jiananmeide的博客

1.select语句中避免使用*,尽量应该根据业务需求按字段进行查询 2.删除重复记录     delete from tble tb where tb.id>(select min(id) from tble ble where tb.name=ble.name) 3.用>=替换> 4.尽量多使用commit   如对大数据量的分段批量提交 5.用not exists 替换not in

今天运行Redis时发生错误，错误信息如下： (error) MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled. Please check Redi