sqlserver 注释查看

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sqlserver 注释查看

点位	SQL
创建表	创建表
表结构和单表相关信息	sp_help ‘TABLE_NAME’
字段变长	alter table gggs.dbo.stu1 alter COLUMN st_na varchar(30)
系统时间	getdate()
表注释查看	增加表和行注释
表注释查看	表注释查看
行注释查看	行注释查看
update	update

表注释查看

SELECT so.[id] AS ObjectID, 
    so.[name] AS ObjectName, so.XType,
    (CASE WHEN (LEFT(text, 2) = '/*') 
      AND (charindex('*/', text) > 0) THEN substring([text], 3, patindex('%*/%', text) - 3) 
      ELSE '' END) AS Comments
FROM syscomments AS sc full  join sysobjects AS so ON so.[id] = sc.[id]
WHERE so.[xtype] = 'U' OR so.[xtype] = 'V'

行注释查看

select   b.[value] from sys.columns a left join sys.extended_properties b on a.object_id=b.major_id
        and a.column_id=b.minor_id inner join sysobjects c on a.column_id=c.id
        and a.[name]='列名' and c.[name]='表名'
        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.xusertype=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='orders'         --如果只查询指定表,加上此条件
        order   by   a.id,a.colorder

update 语法

update  A 
set A.rule_id =
 B.rule_id
from HJX_A_WORKING_FACE_DEVICE_STATUS_RULE B,HJX_R_WORKING_FACE A
where B.wf_id COLLATE Chinese_PRC_CI_AS = A.wf_id COLLATE Chinese_PRC_CI_AS
and B.org_code = A.ORGCODE ;

创建表

--建表
create table DB_NAME.dbo.HJX_A_MSBC(--建表时建议加上作用域，否则很容易将表建错库,DB_NAME 处替换成使用的数据库
MSBC_ID int ,--此处不同于oracle 主键放在最后边添加
MSBC_NA varchar(100),
MSBC_TP varchar(1),
MSBC_MD varchar(20),
MSBC_VT float --数字类型不再需要加长度
primary key(MSBC_ID)
);

创建表注释和行注释

--插入表注释
EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'表注释' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'目标表';
--插入行注释
EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'行注释' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'目标表', @level2type=N'COLUMN',@level2name=N'目标行';