几段SQL Server语句和存储过程

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 testcross) as a

 

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

print @sql

 

-- ======================================================

--列出SQL SERVER 所有表，字段名，主键，类型，长度，小数位数等信息

--在查询分析器里运行即可,可以生成一个表，导出到EXCEL中

-- ======================================================

SELECT

       (case when a.colorder=1 then d.name else '' end)表名,

       a.colorder 字段序号,

       a.name 字段名,

       (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) 标识,

       (case when (SELECT count(*)

       FROM sysobjects

       WHERE (name in

                 (SELECT name

                FROM sysindexes

                WHERE (id = a.id) AND (indid in

                          (SELECT indid

                         FROM sysindexkeys

                         WHERE (id = a.id) AND (colid in

                                   (SELECT colid

                                  FROM syscolumns

                                  WHERE (id = a.id) AND (name = a.name))))))) AND

              (xtype = 'PK'))>0 then '√' else '' end) 主键,

       b.name 类型,

       a.length 占用字节数,

       COLUMNPROPERTY(a.id,a.name,'PRECISION') as 长度,

       isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as 小数位数,

       (case when a.isnullable=1 then '√'else '' end) 允许空,

       isnull(e.text,'') 默认值,

       isnull(g.[value],'') AS 字段说明   

 

FROM  syscolumns  a left join systypes b

on  a.xtype=b.xusertype

inner join sysobjects d

on a.id=d.id  and  d.xtype='U' and  d.name<>'dtproperties'

left join syscomments e

on a.cdefault=e.id

left join sysproperties g

on a.id=g.id AND a.colid = g.smallid 

order by a.id,a.colorder

-------------------------------------------------------------------------------------------------

 

 

 

 

 

 

列出SQL SERVER 所有表、字段定义，类型，长度，一个值等信息

并导出到Excel 中

-- ======================================================

-- Export all user tables definition and one sample value

-- jan-13-2003,Dr.Zhang

-- ======================================================

在查询分析器里运行：

SET ANSI_NULLS OFF

GO

SET NOCOUNT ON

GO

 

SET LANGUAGE 'Simplified Chinese'

go

DECLARE @tbl nvarchar(200),@fld nvarchar(200),@sql nvarchar(4000),@maxlen int,@sample nvarchar(40)

 

SELECT d.name TableName,a.name FieldName,b.name TypeName,a.length Length,a.isnullable IS_NULL INTO #t

FROM  syscolumns  a,  systypes b,sysobjects d 

WHERE  a.xtype=b.xusertype  and  a.id=d.id  and  d.xtype='U'

 

DECLARE read_cursor CURSOR

FOR SELECT TableName,FieldName FROM #t

 

SELECT TOP 1 '_TableName                     ' TableName,

            'FieldName                      ' FieldName,'TypeName             ' TypeName,

            'Length' Length,'IS_NULL' IS_NULL,

            'MaxLenUsed' AS MaxLenUsed,'Sample Value          ' Sample,

             'Comment   ' Comment INTO #tc FROM #t

 

OPEN read_cursor

 

FETCH NEXT FROM read_cursor INTO @tbl,@fld

WHILE (@@fetch_status <> -1)  --- failes

BEGIN

       IF (@@fetch_status <> -2) -- Missing

       BEGIN

              SET @sql=N'SET @maxlen=(SELECT max(len(cast('+@fld+' as nvarchar))) FROM '+@tbl+')'

              --PRINT @sql

              EXEC SP_EXECUTESQL @sql,N'@maxlen int OUTPUT',@maxlen OUTPUT

              --print @maxlen

              SET @sql=N'SET @sample=(SELECT TOP 1 cast('+@fld+' as nvarchar) FROM '+@tbl+' WHERE len(cast('+@fld+' as nvarchar))='+convert(nvarchar(5),@maxlen)+')'

              EXEC SP_EXECUTESQL @sql,N'@sample varchar(30) OUTPUT',@sample OUTPUT

              --for quickly  

              --SET @sql=N'SET @sample=convert(varchar(20),(SELECT TOP 1 '+@fld+' FROM '+

                     --@tbl+' order by 1 desc ))' 

              PRINT @sql

              print @sample

              print @tbl

              EXEC SP_EXECUTESQL @sql,N'@sample nvarchar(30) OUTPUT',@sample OUTPUT

              INSERT INTO #tc SELECT *,ltrim(ISNULL(@maxlen,0)) as MaxLenUsed,

                     convert(nchar(20),ltrim(ISNULL(@sample,' '))) as Sample,' ' Comment FROM #t where TableName=@tbl and FieldName=@fld

       END

       FETCH NEXT FROM read_cursor INTO @tbl,@fld

END

 

CLOSE read_cursor

DEALLOCATE read_cursor

GO

 

SET ANSI_NULLS ON

GO

SET NOCOUNT OFF

GO

select count(*)  from #t

DROP TABLE #t

GO

 

select count(*)-1  from #tc

 

select * into ##tx from #tc order by tablename

DROP TABLE #tc

 

--select * from ##tx

 

declare @db nvarchar(60),@sql nvarchar(3000)

set @db=db_name()

--请修改用户名和口令 导出到Excel 中

set @sql='exec master.dbo.xp_cmdshell ''bcp ..dbo.##tx out c:/'+@db+'_exp.xls -w -C936 -Usa -Psa '''

print @sql

exec(@sql)

GO

DROP TABLE ##tx

GO

 

 

 

-- ======================================================

--根据表中数据生成insert语句的存储过程

--建立存储过程，执行 spGenInsertSQL 表名

--感谢playyuer

-- ======================================================

CREATE   proc spGenInsertSQL (@tablename varchar(256))

 

as

begin

  declare @sql varchar(8000)

  declare @sqlValues varchar(8000)

  set @sql =' ('

  set @sqlValues = 'values (''+'

  select @sqlValues = @sqlValues + cols + ' + '','' + ' ,@sql = @sql + '[' + name + '],'

    from

        (select case

                  when xtype in (48,52,56,59,60,62,104,106,108,122,127)                               

                       then 'case when '+ name +' is null then ''NULL'' else ' + 'cast('+ name + ' as varchar)'+' end'

                  when xtype in (58,61)

                       then 'case when '+ name +' is null then ''NULL'' else '+''''''''' + ' + 'cast('+ name +' as varchar)'+ '+'''''''''+' end'

                 when xtype in (167)

                       then 'case when '+ name +' is null then ''NULL'' else '+''''''''' + ' + 'replace('+ name+','''''''','''''''''''')' + '+'''''''''+' end'

                  when xtype in (231)

                       then 'case when '+ name +' is null then ''NULL'' else '+'''N'''''' + ' + 'replace('+ name+','''''''','''''''''''')' + '+'''''''''+' end'

                  when xtype in (175)

                       then 'case when '+ name +' is null then ''NULL'' else '+''''''''' + ' + 'cast(replace('+ name+','''''''','''''''''''') as Char(' + cast(length as varchar)  + '))+'''''''''+' end'

                  when xtype in (239)

                       then 'case when '+ name +' is null then ''NULL'' else '+'''N'''''' + ' + 'cast(replace('+ name+','''''''','''''''''''') as Char(' + cast(length as varchar)  + '))+'''''''''+' end'

                  else '''NULL'''

                end as Cols,name

           from syscolumns 

          where id = object_id(@tablename)

        ) T

  set @sql ='select ''INSERT INTO ['+ @tablename + ']' + left(@sql,len(@sql)-1)+') ' + left(@sqlValues,len(@sqlValues)-4) + ')'' from '+@tablename

  --print @sql

  exec (@sql)

end

 

GO

 

 

 

-- ======================================================

--根据表中数据生成insert语句的存储过程

--建立存储过程，执行 proc_insert 表名

--感谢Sky_blue

-- ======================================================

 

CREATE proc proc_insert (@tablename varchar(256))

as

begin

       set nocount on

       declare @sqlstr varchar(4000)

       declare @sqlstr1 varchar(4000)

       declare @sqlstr2 varchar(4000)

       select @sqlstr='select ''insert '+@tablename

       select @sqlstr1=''

       select @sqlstr2=' ('

       select @sqlstr1= ' values ( ''+'

       select @sqlstr1=@sqlstr1+col+'+'',''+' ,@sqlstr2=@sqlstr2+name +',' from (select case

--     when a.xtype =173 then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar('+convert(varchar(4),a.length*2+2)+'),'+a.name +')'+' end'

       when a.xtype =104 then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar(1),'+a.name +')'+' end'

       when a.xtype =175 then 'case when '+a.name+' is null then ''NULL'' else '+'''''''''+'+'replace('+a.name+','''''''','''''''''''')' + '+'''''''''+' end'

       when a.xtype =61  then 'case when '+a.name+' is null then ''NULL'' else '+'''''''''+'+'convert(varchar(23),'+a.name +',121)'+ '+'''''''''+' end'

       when a.xtype =106 then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar('+convert(varchar(4),a.xprec+2)+'),'+a.name +')'+' end'

       when a.xtype =62  then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar(23),'+a.name +',2)'+' end'

       when a.xtype =56  then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar(11),'+a.name +')'+' end'

       when a.xtype =60  then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar(22),'+a.name +')'+' end'

       when a.xtype =239 then 'case when '+a.name+' is null then ''NULL'' else '+'''''''''+'+'replace('+a.name+','''''''','''''''''''')' + '+'''''''''+' end'

       when a.xtype =108 then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar('+convert(varchar(4),a.xprec+2)+'),'+a.name +')'+' end'

       when a.xtype =231 then 'case when '+a.name+' is null then ''NULL'' else '+'''''''''+'+'replace('+a.name+','''''''','''''''''''')' + '+'''''''''+' end'

       when a.xtype =59  then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar(23),'+a.name +',2)'+' end'

       when a.xtype =58  then 'case when '+a.name+' is null then ''NULL'' else '+'''''''''+'+'convert(varchar(23),'+a.name +',121)'+ '+'''''''''+' end'

       when a.xtype =52  then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar(12),'+a.name +')'+' end'

       when a.xtype =122 then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar(22),'+a.name +')'+' end'

       when a.xtype =48  then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar(6),'+a.name +')'+' end'

--     when a.xtype =165 then 'case when '+a.name+' is null then ''NULL'' else '+'convert(varchar('+convert(varchar(4),a.length*2+2)+'),'+a.name +')'+' end'

       when a.xtype =167 then 'case when '+a.name+' is null then ''NULL'' else '+'''''''''+'+'replace('+a.name+','''''''','''''''''''')' + '+'''''''''+' end'

       else '''NULL'''

       end as col,a.colid,a.name

       from syscolumns a where a.id = object_id(@tablename) and a.xtype <>189 and a.xtype <>34 and a.xtype <>35 and  a.xtype <>36

       )t order by colid

      

       select @sqlstr=@sqlstr+left(@sqlstr2,len(@sqlstr2)-1)+') '+left(@sqlstr1,len(@sqlstr1)-3)+')'' from '+@tablename

--  print @sqlstr

       exec( @sqlstr)

       set nocount off

end

GO