SQL 语句

1.分页查询语句
select top(" + pagesize + ") * from ( select row_number() over (order by b.usin_car_num asc) as RowNumber,COUNT(*) OVER() AS total,
b.usin_ID,b.usin_name,b.usin_car_num,b.usin_car_color,b.RegisterTime,b.usin_datetime,b.usin_recv_datetime,b.usin_sim_card,b.usin_pwd,
a.Produce_deadline_time from UserInfo as b INNER JOIN Produce as a ON b.Produce_SN = a.Produce_SN WHERE b.usin_name=@usin_name 
and (Produce_deadline_time >= GETDATE() or Produce_deadline_time is null)) as temp where  RowNumber > "+pagesize+" * (" + page + " -1)  order by temp.usin_car_num asc 
2.查重，显示重复的数据与重复条数
 SELECT usin_name, COUNT(*) AS repeat FROM   [GYGpsSystem].[dbo].[UserInfo] GROUP BY usin_name HAVING  (COUNT(*) > 1)

 3. 生成数据字典语句

 SELECT 表名=case when a.colorder=1 then  d.name else '' end,表说明=case when a.colorder=1 then isnull(f.value,'') else '' end,字段序号=a.colorder,字段名=a.name,标识=case when 
  COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else ''  end,主键=case when exists(SELECT 1 FROM sysobjects where  xtype='PK' and name in 
(SELECT  name FROM sysindexes WHERE indid in(SELECT  indid FROM sysindexkeys WHERE id = a.id  AND colid=a.colid ))) 
    then '√' else '' end,类型=b.name,占用字节数=a.length,长度=COLUMNPROPERTY(a.id,a.name,'PRECISION'),
    小数位数=isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),允许空=case when a.isnullable=1 then  '√'else '' end,
    默认值=isnull(e.text,''),字段说明=isnull(g.[value],'')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 sys.extended_properties g on a.id=g.major_id and a.colid=g.minor_id
  left  join sys.extended_properties f on d.id=f.major_id and f.minor_id  =0 
  where   d.name='Alarm'   --如果只查询指定表,加上此条件    
  order  by a.id,a.colorder