Such customization can include adding missing function mappings, altering the data type of a nickname column, and setting some performance-related options.
这些定制可包括添加缺失的函数映射、修改昵称列的数据类型以及设置某些与性能相关的选项。
Although the data type in Web service development can partially resolve the problem to give out the options of data sources, WSDL itself is still a problematic guidance to the service requesters.
尽管数据类型在Web服务开发中可以部分地解决数据源的选择问题，但对于服务请求者WSDL仍旧不是一个好的解决方案。
For each of the columns, be sure to select the right data type and to uncheck the Allow Nulls options.
对每个列，要确保选择了正确的数据类型，并取消“允许为空”复选框。
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