sql删除small bank company的雇员在works关系中的所有元组,下图加横线部分为主码delete from companywhere company-name = “small bank company”这样删除对吗?
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![sql删除small bank company的雇员在works关系中的所有元组,下图加横线部分为主码delete from companywhere company-name = “small bank company”这样删除对吗?](/uploads/image/z/13980162-66-2.jpg?t=sql%E5%88%A0%E9%99%A4small+bank+company%E7%9A%84%E9%9B%87%E5%91%98%E5%9C%A8works%E5%85%B3%E7%B3%BB%E4%B8%AD%E7%9A%84%E6%89%80%E6%9C%89%E5%85%83%E7%BB%84%2C%E4%B8%8B%E5%9B%BE%E5%8A%A0%E6%A8%AA%E7%BA%BF%E9%83%A8%E5%88%86%E4%B8%BA%E4%B8%BB%E7%A0%81delete+from+companywhere+company-name+%3D+%E2%80%9Csmall+bank+company%E2%80%9D%E8%BF%99%E6%A0%B7%E5%88%A0%E9%99%A4%E5%AF%B9%E5%90%97%3F)
sql删除small bank company的雇员在works关系中的所有元组,下图加横线部分为主码delete from companywhere company-name = “small bank company”这样删除对吗?
sql删除small bank company的雇员在works关系中的所有元组,下图加横线部分为主码
delete from company
where company-name = “small bank company”
这样删除对吗?
sql删除small bank company的雇员在works关系中的所有元组,下图加横线部分为主码delete from companywhere company-name = “small bank company”这样删除对吗?
delete from works where company_name='small bank company'
delete from company where company_name = 'small bank company'
先执行第一句再执行第二句,否则可能会因为外键约束导致你删除失败的
sql删除small bank company的雇员在works关系中的所有元组,下图加横线部分为主码delete from companywhere company-name = “small bank company”这样删除对吗?
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