mysql存储过程数据库多表查询sql性能优化
网上都说多表联查性能很低尽量避免join的操作等等,我在项目里面也碰到了这个大问题,有些报表就需要几张表联查才能得到数据,但是表里面数据太多查询时间就增加了。我尝试用存储过程代替,但是我在存储过程里面还是只会写join,是不是用的方式不对?请大家指点迷津谢谢

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