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--=======================CONVERT()==================================================
Select CONVERT(varchar(100), GETDATE(), 0)--: 05 16 2006 10:57AM
Select CONVERT(varchar(100), GETDATE(), 1)--: 05/16/06
Select CONVERT(varchar(100), GETDATE(), 2)--: 06.05.16
Select CONVERT(varchar(100), GETDATE(), 3)--: 16/05/06
Select CONVERT(varchar(100), GETDATE(), 4)--: 16.05.06
Select CONVERT(varchar(100), GETDATE(), 5)--: 16-05-06
Select CONVERT(varchar(100), GETDATE(), 6)--: 16 05 06
Select CONVERT(varchar(100), GETDATE(), 7)--: 05 16, 06
Select CONVERT(varchar(100), GETDATE(), 8)--: 10:57:46
Select CONVERT(varchar(100), GETDATE(), 9)--: 05 16 2006 10:57:46:827AM
Select CONVERT(varchar(100), GETDATE(), 10)--: 05-16-06    --¿´,ÄãÒªµÄÔÚÕâÀï
Select CONVERT(varchar(100), GETDATE(), 11)--: 06/05/16
Select CONVERT(varchar(100), GETDATE(), 12)--: 060516
Select CONVERT(varchar(100), GETDATE(), 13)--: 16 05 2006 10:57:46:937
Select CONVERT(varchar(100), GETDATE(), 14)--: 10:57:46:967
Select CONVERT(varchar(100), GETDATE(), 20)--: 2006-05-16 10:57:47
Select CONVERT(varchar(100), GETDATE(), 21)--: 2006-05-16 10:57:47.157
Select CONVERT(varchar(100), GETDATE(), 22)--: 05/16/06 10:57:47 AM
Select CONVERT(varchar(100), GETDATE(), 23)--: 2006-05-16
Select CONVERT(varchar(100), GETDATE(), 24)--: 10:57:47
Select CONVERT(varchar(100), GETDATE(), 25)--: 2006-05-16 10:57:47.250
Select CONVERT(varchar(100), GETDATE(), 100)--: 05 16 2006 10:57AM
Select CONVERT(varchar(100), GETDATE(), 101)--: 05/16/2006
Select CONVERT(varchar(100), GETDATE(), 102)--: 2006.05.16
Select CONVERT(varchar(100), GETDATE(), 103)--: 16/05/2006
Select CONVERT(varchar(100), GETDATE(), 104)--: 16.05.2006
Select CONVERT(varchar(100), GETDATE(), 105)--: 16-05-2006
Select CONVERT(varchar(100), GETDATE(), 106)--: 16 05 2006
Select CONVERT(varchar(100), GETDATE(), 107)--: 05 16, 2006
Select CONVERT(varchar(100), GETDATE(), 108)--: 10:57:49
Select CONVERT(varchar(100), GETDATE(), 109)


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select row_number() over(order by firmid) from dbo.tb_BuildingMaterial
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select rank() over(order by firmid) from dbo.tb_BuildingMaterial
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Oracle SQL Developer¹¤¾ß

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Unable to create an instance of the Java Virtual Machine
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SQL Server ÖÇÄܸÐÖª²å¼þSQL Prompt 4(ÓÐͼÓÐÕæÏà)

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;   //ÒýÓÃÃüÃû¿Õ¼ä
namespace DAL
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