交叉表的实殃及向SQL SERVER数据库中插入数据时,出现乱码或???(问号)的解决方法。

时间:2021-01-07 07:35:45

再向SQL SERVER数据库中插入数据时,出现乱码或???(问号)的解决方法。
ALTER DATABASE  YourDataBaseName COLLATE Chinese_PRC_CI_AS

 

 

交叉表实例(转载)

1、  建表:  在查询分析器里运行:

  CREATE TABLE [Test] (

  [id] [int] IDENTITY (1, 1) NOT NULL ,

  [name] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,

  [subject] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,

  [Source] [numeric](18, 0) NULL

  ) ON [PRIMARY]

  GO

  INSERT INTO [test] ([name],[subject],[Source]) values (N'张三',N'语文',60)

  INSERT INTO [test] ([name],[subject],[Source]) values (N'李四',N'数学',70)

  INSERT INTO [test] ([name],[subject],[Source]) values (N'王五',N'英语',80)

  INSERT INTO [test] ([name],[subject],[Source]) values (N'王五',N'数学',75)

  INSERT INTO [test] ([name],[subject],[Source]) values (N'王五',N'语文',57)

  INSERT INTO [test] ([name],[subject],[Source]) values (N'李四',N'语文',80)

  INSERT INTO [test] ([name],[subject],[Source]) values (N'张三',N'英语',100)

  Go

 2、交叉表语句的实现:  用于:交叉表的列数是确定的

  select name,sum(case subject when '数学' then source else 0 end) as '数学',

  sum(case subject when '英语' then source else 0 end) as '英语',

  sum(case subject when '语文' then source else 0 end) as '语文'

  from test

  group by name

  --用于:交叉表的列数是不确定的

  declare @sql varchar(8000)

  set @sql = 'select name,'

  select @sql = @sql + 'sum(case subject when '''+subject+'''

  then source else 0 end) as '''+subject+''','

  from (select distinct subject from test) as a

  select @sql = left(@sql,len(@sql)-1) + ' from test group by name'

  exec(@sql)

  go