医院信息管理系统源代码
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[FK_药品库存_药品资料]') and OBJECTPROPERTY(id, N'IsForeignKey') = 1) ALTER TABLE [dbo].[...
Constraint技术资料
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💻 源代码：5159
CONSTRAINT子句是指限制和索引相似，虽然限制也能被用于建立和另一个表的关联。用ALTERTABLE和CREATETABLE语句中的CONSTRAINT子句来建立或删除条件.CONSTRAINT子句可分为两种类型：第一种是在单一字段上创建条件；第二种是在一个以上的字段上创建条件。
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查看全部31个资源 »Allegro SPB V15.2 版新增功能
15.2 已經加入了有關貫孔及銲點的Z軸延遲計算功能. 先開啟 Setup - Constraints - Electrical constraint sets 下的 DRC 選項. 點選 Electrical Constraints dialog box 下 Options...
Allegro SPB V15.2 版新增功能
15.2 已經加入了有關貫孔及銲點的Z軸延遲計算功能. 先開啟 Setup - Constraints - Electrical constraint sets 下的 DRC 選項. 點選 Electrical Constraints dialog box 下 Options...
I was pleasantly surprised when in November 2005 a message arrived from Wayne Wheeler, the new comp
I was pleasantly surprised when in November 2005 a message arrived from Wayne Wheeler, the new computer science editor of Springer Verlag, notifying ...
ABAQUS is a general purpose finite element analysis program which is widely used to analyses mechani
ABAQUS is a general purpose finite element analysis program which is widely used to analyses mechanical, structure and civil engineering problems. Aba...
💻 Constraint源代码
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