SQL空和NULL的区别
摘要：1.NULL意思为缺失的值(missing value).2.三值逻辑(three-valued-logic: TRUE,FALSE,UNKNOWN). 在SQL中有三个逻辑谓词:TURE,FALSE,UNKNOWN.在大多数的编程语言中只有TRUE和FALSE,而在SQL中独有UNKNOWN,之所...
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posted @
2015-10-30 16:25
donchen-c
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AJAX同步问题
摘要：@using ShippingRen.CommonV2.CloudStorage; @using ShippingRen.Api.ServiceModel.PublicDataEntity.Lookup; @using ShippingRen.WebApi.ServiceModel.SRDataEntity.Order; @using Newtonsoft.Json; @using Shipp...
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posted @
2015-10-15 10:17
donchen-c
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