Oracle、Mysql、SqlServer創建表和給表和字段加注釋

Oracle、Mysql、SqlServer創建表和給表和字段加注釋 
一、Oracle
--創建表
create table test ( 
     id varchar2(200) primary key not null,
     sort number, 
     name varchar(200)
)
--字段加注釋
comment on column test.id is 'id'; 
comment on column test.sort is '序號';
--表加注釋
comment on table test is '測試表' 

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 二.Mysql
--創建表
create table test ( 
     id varchar(200) not null,
     sort int(11) comment '排序',
     name varchar(200) comment  '名稱',
)           
--表加注釋
alter table test comment ='測試表' 

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三.SqlServer
--創建表
create table test ( 
     id varchar(200) primary key not null,
     sort int,
     name varchar(200),
)
--給字段加注釋
EXEC sp_addextendedproperty N'test', N'序號', N'user', N'dbo', N'table', N'test', N'column', N'sort';
--表加注釋
EXECUTE sp_addextendedproperty N'test', N'測試表', N'user', N'dbo',N'table', N'test', NULL, NULL 
刪除字段注釋  
execute sp_dropextendedproperty 'MS_Description','user','dbo','table','testTable','column','testRecord';  
刪除表注釋  
execute sp_dropextendedproperty 'MS_Description','user','dbo','table','testTable',null,null;   

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sqlserver

--表加注釋
EXECUTE sp_addextendedproperty N'MS_Description', N'賬號類型表', N'user', N'dbo',N'table', N'Account_Type', NULL, NULL 
--獲取表注釋
SELECT isnull(B.name,'')as name,A.value FROM sys.extended_properties A
LEFT JOIN sys.columns B ON A.major_id=B.object_id AND A.minor_id=B.column_id
LEFT JOIN sys.tables C ON A.major_id=C.object_id
WHERE A.class=1 AND C.name='Account_Type' and isnull(B.name,'')=''

--給字段加注釋
EXEC sp_addextendedproperty N'MS_Description', N'序號', N'user', N'dbo', N'table', N'Account_Type', N'column', N'Type_Id';
--獲取字段注釋
SELECT A.value FROM sys.extended_properties A
LEFT JOIN sys.columns B ON A.major_id=B.object_id AND A.minor_id=B.column_id
LEFT JOIN sys.tables C ON A.major_id=C.object_id
WHERE A.class=1 AND B.name='Type_Id' AND C.name='Account_Type'