SQL SERVER 查看表信息

原文：https://blog.51cto.com/cplvfx/5392016

-- 执行下 看 表字段注释 
use 数据库名;
SELECT
　　A.name AS table_name,
　　B.name AS column_name,
　　C.value AS column_description
　　FROM sys.tables A
　　INNER JOIN sys.columns B ON B.object_id = A.object_id
　　LEFT JOIN sys.extended_properties C ON C.major_id = B.object_id AND C.minor_id = B.column_id
　　WHERE A.name = '表名';

-- 获取 表字段 和 字段类型
select column_name name,data_type type 
from information_schema.columns 
where table_name = '表名'

-- schema :可以存放表、视图、存储过程等 
-- 主要是用于权限控制安全控制的
-- 获取列信息 information_schema.columns  系统视图

-- Sqlserver查询所有表名及其描述​
select top 1000
ROW_NUMBER() OVER (ORDER BY a.name) AS No, 
a.name AS 表名,
CONVERT(NVARCHAR(100),isnull(g.[value],'-')) AS 说明
from
sys.tables a left join sys.extended_properties g
on (a.object_id = g.major_id AND g.minor_id = 0)

--快速查看所有表
SELECT TABLE_NAME   FROM INFORMATION_SCHEMA.TABLES   



--快速查看表结构（比较全面的）
SELECT  CASE WHEN col.colorder = 1 THEN obj.name
                  ELSE ''
             END AS 表名,
        col.colorder AS 序号 ,
        col.name AS 列名 ,
        ISNULL(ep.[value], '') AS 列说明 ,
        t.name AS 数据类型 ,
        col.length AS 长度 ,
        ISNULL(COLUMNPROPERTY(col.id, col.name, 'Scale'), 0) AS 小数位数 ,
        CASE WHEN COLUMNPROPERTY(col.id, col.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 = si.name
                                                              AND so.xtype = 'PK'
                           WHERE    sc.id = col.id
                                    AND sc.colid = col.colid ) THEN '√'
             ELSE ''
        END AS 主键 ,
        CASE WHEN col.isnullable = 1 THEN '√'
             ELSE ''
        END AS 允许空 ,
        ISNULL(comm.text, '') AS 默认值
FROM    dbo.syscolumns col
        LEFT  JOIN dbo.systypes t ON col.xtype = t.xusertype
        inner JOIN dbo.sysobjects obj ON col.id = obj.id
                                         AND obj.xtype = 'U'
                                         AND obj.status >= 0
        LEFT  JOIN dbo.syscomments comm ON col.cdefault = comm.id
        LEFT  JOIN sys.extended_properties ep ON col.id = ep.major_id
                                                      AND col.colid = ep.minor_id
                                                      AND ep.name = 'MS_Description'
        LEFT  JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_id
                                                         AND epTwo.minor_id = 0
                                                         AND epTwo.name = 'MS_Description'
WHERE   obj.name = 'sys_buried_point_search'--表名
ORDER BY col.colorder ;