sql server 表结构数据字典的sql语句
SELECT TOP (100) PERCENT
CASE WHEN a.colorder = 1 THEN d .name ELSE '' END AS 表名, CASE WHEN a.colorder = 1 THEN isnull(f.value, '')
ELSE '' END AS 表说明, a.colorder AS 字段序号, a.name AS 字段名, CASE WHEN COLUMNPROPERTY(a.id, a.name, 'IsIdentity')
= 1 THEN '√' ELSE '' END AS 标识, CASE WHEN EXISTS
(SELECT 1 from dbo.sysindexes si INNER JOIN
dbo.sysindexkeys sik ON si.id = sik.id AND si.indid = sik.indid INNER JOIN
dbo.syscolumns sc ON sc.id = sik.id AND sc.colid = sik.colid INNER JOIN
dbo.sysobjects so ON so.name = so.name AND so.xtype = 'PK'
WHERE sc.id = a.id AND sc.colid = a.colid) THEN '√' ELSE '' END AS 主键, b.name AS 类型, a.length AS 长度, COLUMNPROPERTY(a.id, a.name,
'PRECISION') AS 精度, ISNULL(COLUMNPROPERTY(a.id, a.name, 'Scale'), 0) AS 小数位数,
CASE WHEN a.isnullable = 1 THEN '√' ELSE '' END AS 允许空, ISNULL(e.text, '') AS 默认值, ISNULL(g.value, '') AS 字段说明, d.crdate AS 创建时间,
CASE WHEN a.colorder = 1 THEN d .refdate ELSE NULL END AS 更改时间
from dbo.syscolumns AS a LEFT OUTER JOIN
dbo.systypes AS b ON a.xtype = b.xusertype INNER JOIN
dbo.sysobjects AS d ON a.id = d.id AND d.xtype = 'U' AND d.status >= 0 LEFT OUTER JOIN
dbo.syscomments AS e ON a.cdefault = e.id LEFT OUTER JOIN
sys.extended_properties AS g ON a.id = g.major_id AND a.colid = g.minor_id LEFT OUTER JOIN
sys.extended_properties AS f ON d.id = f.major_id AND f.minor_id = 0
ORDER BY d.name, 字段序号
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Update Channel set Unit ='mg' ,
RunUpThreshold='10' ,
RunDownThreshold='10' ,
SafetyUpThreshold='10' ,
SafetyDownThreshold='10'
where Bridge='001' and DeviceCode='AS'
and SensorCode='001' and Supplement='N'
set ： ','
where: and ......
Join操作符
适用场景：在我们表关系中有一对一关系，一对多关系，多对多关系等。对各个表之间的关系，就用这些实现对多个表的操作。
说明：在Join操作中，分别为Join(Join查询), SelectMany(Select一对多选择)和GroupJoin(分组Join查询)。
该扩展方法对两个序列中键匹配的元素进行inner join操作
SelectMany
说明：我� ......
# MySQL-Front 5.1 (Build 4.2)
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE */;
/*!40101 SET SQL_MODE='STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES */;
/*!40103 SET SQL_NOTES='ON' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS */ ......
sql server 2000导出表结构
1.
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, ......
1. select top pageSize
* from table where id not in(select top((pageNo-1)*pageSize
) id from table order by id asc)
2. select * from table where id<=pageSize*pageNo
and id>(pageNo-1)*pageSize
order by id asc
注：
pagesize每页显示的记录数
pageNo当前第几页
......
