摘要:
1.add reference [System.Runtime.Serializatio] 2.using [System.Runtime.Serialization] and [System.Runtime.Serialization.Json] 3.define model class add 阅读全文
摘要:
Table ID Amount Number 1 28.26 NULL 2 NULL NULL 3 NULL NULL SQL SELECT SUM(Amount),SUM(Number),COUNT(Amount),COUNT(Number),COUNT(1) FROM Test SELECT S 阅读全文