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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';