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SQLServer»ñÈ¡ExcelÖÐËùÓÐSheet

EÅ̸ùĿ¼Ð½¨Ò»¸öExcelÎļþaa.xlsºó²âÊÔÈçÏ´úÂë
use tempdb
go
if (object_id ('udf_getExcelTableNames' ) is not null )
    drop function dbo .udf_getExcelTableNames
go
create function udf_getExcelTableNames (@filename varchar (1000 ))
returns @t table (id int , name varchar (255 ))
as
begin
    declare   
    @error int , @obj int , @c int , @sheetname varchar (255 ) , @sheetstring varchar (255 )
  
    exec @error = sp_oacreate 'Excel.Application' , @obj   out  
    exec @error = sp_oamethod @obj , 'Workbooks.Open' , @c out , @filename
    exec @error = sp_oagetproperty @obj , 'ActiveWorkbook.Sheets.Count' , @c    out
    while (@c > 0 )
    begin
        set @sheetstring = 'ActiveWorkbook.Sheets(' + ltrim (@c )+ ').Name'
        exec @error = sp_oagetproperty @obj , @sheetstring , @sheetname    out
        insert into @t select @c , @sheetname
        set @c = @c - 1
    end
    exec @error = sp_oadestroy @obj  
    return
end
go
select * from dbo .udf_getExcelTableNames ('e:\aa.xls' )
/*--²âÊÔ½á¹û
3    Sheet3
2    Sheet2
1    Sheet1
*/


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1.»ñÈ¡ËùÓÐÊý¾Ý¿âÃû:
SELECT Name from Master..SysDatabases ORDER BY Name
2.»ñÈ¡ËùÓбíÃû:
SELECT Name from DatabaseName..SysObjects Where XType='U' ORDER BY Name
XType='U':±íʾËùÓÐÓû§±í;
XType='S':±íʾËùÓÐϵͳ± ......

Ëæ»úÑ¡ÔñÐеÄSQLÓï¾ä? ORACLE SQLSERVER ECT.

MySQL:
SELECT column from table
ORDER BY RAND()
LIMIT 1
PostgreSQL:
SELECT column from table
ORDER BY RANDOM()
LIMIT 1
Microsoft SQL Server:
SELECT TOP 1 column from table
ORDER BY NEWID()
IBM DB2
SELECT column, RAND() as IDX
from table
ORDER BY IDX FETCH FIRST 1 ROWS ONLY
Thanks Ti ......

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SQLServer»ñȡÿ×éÇ°10%µÄÊý¾Ý

sqlserver2005Óйؼü×Öntile(x)ºÍover(partition by.. order by..)×Ó¾äÅäºÏ.
±ÈÈç»ñȡÿ¸ö±íµÄÇ°10%¸ö×ֶΡ£
select id , name , colid , rn from (
select * , rn = ntile (10 )
    over (partition by id order by colorder )
from syscolumns )t where rn = 1 ......
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