1、检索原表比视图快。
程序中调sql语句时,能用原表的尽量用原表,因为用原表查询的时候速度远快于查询视图。
比如:原表检索
select t.kcbj,min(t.xn) as xn,min(t.xq) as xq,min(t.jszgh) as jszgh,min(t.kcmc) as kcmc,min(t.skzhou) as skzhou,min(t.skxingqi) as skxingqi,wm_concat(distinct t.bjmc) as bjmc,min(t.jxrwid) as jxrwid,min(t.skdd) as skdd,min(t.jsxm) as jsxm,min(t.xkkh) as xkkh,min(t.num_xingqi) as num_xingqi,min(t.zhoutype) as zhoutype,min(t.id)as id,min(t.hbbj)as hbbj,wm_concat(distinct t.skjie) as skjie
from kebiao t
where t.jszgh = 'J00432'
group by t.kcbj
order by t.kcbj;
视图:
select * from v_kebiao_hb_hj where jszgh = 'J00432';
数据检索速度
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转载自z-408.iteye.com/blog/2087869
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