One solution would be to use database-level checking constraints.
解决方案之一是用数据库级检测约束。
But there's no rule that says you have to use database-backed models to do your functional tests.
但没有规定要求必须使用受数据库支撑的模型去做功能测试。
It is also a sound choice if you want to use database referential integrity to enforce associations.
如果你想用数据库的引用完整性来做关联，那它也是个合适的选择。
Now that you've learned how to use database support if it is present, the next section explores how to use Web worker support.
了解了如何使用数据库支持(如果有的话)后，接下来的一节将会探讨如何使用Webworker支持。
If you use a code generator, really look at the code it generates; if you use database tools, take a look at the underlying SQL it generates; and so on.
如果你使用代码生成器，好好看看它生成的代码；如果你使用数据库工具，看看它生成的底层SQL语句，不一而足。
Third, creation, management and data seamless integration of basic geo-spatial database, theme database and land use database.
第三、基础地理空间数据库、专题数据库、土地利用数据库的建立、管理和数据无缝集成。
You can't use database features such as referential integrity, and you can't rely on tools to discover the relationships based on the names of your columns.
不能使用诸如引用完整性这样的数据库特性，也不能依赖于工具来基于列的名称发现这些关系。
This article selected a county-level city-Xiangxiang City as the study area, based on land use database to research land use cover change in Xiangxiang.
本文选取县级市湘乡市市域为研究区域，以土地利用现状数据库为基础，研究湘乡市的土地利用覆被变化。
First, we assume that WebSphere Commerce is configured to use database authentication, so that shoppers will have their credentials and user profiles stored in the database.
首先，我们假定配置WebSphereCommerce是为了使用数据库认证，那样购物者就会将他们的凭证以及用户概要文件存储在数据库中。
Establish the rural land use database, basic farmland database, rural land ownership database, remote sensing image database and classification summary and maps of results.
建立了农村土地利用数据库、基本农田数据库、农村土地权属数据库、遥感影像数据库以及分类面积汇总表和图件成果。
Taking Geographic Information System (GIS) as an urban environmental modelling framework allows modellers to use database, data visualization, and analytical tools in a single integrated environment.
用地理信息系统(GIS)作为一个环境模型框架，允许模型开发者在一个单独的集成环境下使用数据库、数据可视化和GIS的强大分析工具。
使用数据库复制。
Use database configuration parameter 'DFT_MTTB_TYPES'.
使用数据库配置参数' DFT_MTTB_TYPES '。
Use database configuration parameter 'DFT_MTTB_TYPES'.
使用数据库配置参数' DFT_MTTB_TYPES '。
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