Create view a1 as select * from hycs
Create view a2 as select * from a1 where dz='和平区'
Drop view a1 --->運行到這句時﹐a1不存在了﹐所以a2已經找不到a1視圖
Create view a2 as select * from a1 where dz='和平区'
Drop view a1 --->運行到這句時﹐a1不存在了﹐所以a2已經找不到a1視圖
解决方案 »
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