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构建施耐德楼控系统数据库后台服务器示例工程四(SQLServer查询语句)

来源:网络 作者:佚名 点击: 时间:2018-03-14 07:28
[摘要] 由于目前做的是一个数据库操作的一个简易类,涉及到如下查询语句,在此记录一下。 1 查询表名select object_id,name name from sys tables2 查询列信息SELECT (case when a c

由于目前做的是一个数据库操作的一个简易类,涉及到如下查询语句,在此记录一下。
1.查询表名

select object_id,name name from sys.tables

2.查询列信息

SELECT (case
         when a.colorder = 1 then
          d.name
         else
          null
       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 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 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.class
   and f.minor_id = 0
 where b.name is not null
   and d.name = ?
 order by a.id, a.colorder;

3.分页查询

select *
  from (select row_number() over(order by AlarmPriority) as rownumber,*
          from event) A
 where rownumber BETWEEN 0 and 10
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