DDR爱好者之家 Design By 杰米
通过ADO可以访问SQL SERVER,并执行相应的SQL语句建库、建表,下面是SQL SERVER BOOKS ONLINE中的相关定义。
建表:
CREATE TABLE
[
database_name.[owner].
| owner.
] table_name
(
{
| column_name AS computed_column_expression
} [,...n]
)
[ON {filegroup | DEFAULT} ]
[TEXTIMAGE_ON {filegroup | DEFAULT} ]
::= { column_name data_type }
[ [ DEFAULT constant_expression ]
| [ IDENTITY [(seed, increment ) [NOT FOR REPLICATION] ] ]
]
[ ROWGUIDCOL ]
[ ] [ ...n]
::= [CONSTRAINT constraint_name]
{
[ NULL | NOT NULL ]
| [ { PRIMARY KEY | UNIQUE }
[CLUSTERED | NONCLUSTERED]
[WITH FILLFACTOR = fillfactor]
[ON {filegroup | DEFAULT} }
]
| [ [FOREIGN KEY]
REFERENCES ref_table [(ref_column) ]
[NOT FOR REPLICATION]
]
| CHECK [NOT FOR REPLICATION]
(logical_expression)
}
::= [CONSTRAINT constraint_name]
{
[ { PRIMARY KEY | UNIQUE }
[ CLUSTERED | NONCLUSTERED]
{ ( column[,...n] ) }
[ WITH FILLFACTOR = fillfactor]
[ON {filegroup | DEFAULT} ]
]
| FOREIGN KEY
[(column[,...n])]
REFERENCES ref_table [(ref_column[,...n])]
[NOT FOR REPLICATION]
| CHECK [NOT FOR REPLICATION]
(search_conditions)
}
建库:
CREATE DATABASE database_name
[ ON [PRIMARY]
[ [,...n] ]
[, [,...n] ]
]
[ LOG ON { [,...n]} ]
[ FOR LOAD | FOR ATTACH ]
::=
( [ NAME = logical_file_name, ]
FILENAME = 'os_file_name'
[, SIZE = size]
[, MAXSIZE = { max_size | UNLIMITED } ]
[, FILEGROWTH = growth_increment] ) [,...n]
::=
FILEGROUP filegroup_name [,...n]
建表:
CREATE TABLE
[
database_name.[owner].
| owner.
] table_name
(
{
| column_name AS computed_column_expression
} [,...n]
)
[ON {filegroup | DEFAULT} ]
[TEXTIMAGE_ON {filegroup | DEFAULT} ]
::= { column_name data_type }
[ [ DEFAULT constant_expression ]
| [ IDENTITY [(seed, increment ) [NOT FOR REPLICATION] ] ]
]
[ ROWGUIDCOL ]
[ ] [ ...n]
::= [CONSTRAINT constraint_name]
{
[ NULL | NOT NULL ]
| [ { PRIMARY KEY | UNIQUE }
[CLUSTERED | NONCLUSTERED]
[WITH FILLFACTOR = fillfactor]
[ON {filegroup | DEFAULT} }
]
| [ [FOREIGN KEY]
REFERENCES ref_table [(ref_column) ]
[NOT FOR REPLICATION]
]
| CHECK [NOT FOR REPLICATION]
(logical_expression)
}
::= [CONSTRAINT constraint_name]
{
[ { PRIMARY KEY | UNIQUE }
[ CLUSTERED | NONCLUSTERED]
{ ( column[,...n] ) }
[ WITH FILLFACTOR = fillfactor]
[ON {filegroup | DEFAULT} ]
]
| FOREIGN KEY
[(column[,...n])]
REFERENCES ref_table [(ref_column[,...n])]
[NOT FOR REPLICATION]
| CHECK [NOT FOR REPLICATION]
(search_conditions)
}
建库:
CREATE DATABASE database_name
[ ON [PRIMARY]
[ [,...n] ]
[, [,...n] ]
]
[ LOG ON { [,...n]} ]
[ FOR LOAD | FOR ATTACH ]
::=
( [ NAME = logical_file_name, ]
FILENAME = 'os_file_name'
[, SIZE = size]
[, MAXSIZE = { max_size | UNLIMITED } ]
[, FILEGROWTH = growth_increment] ) [,...n]
::=
FILEGROUP filegroup_name [,...n]
DDR爱好者之家 Design By 杰米
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DDR爱好者之家 Design By 杰米
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P70系列延期,华为新旗舰将在下月发布
3月20日消息,近期博主@数码闲聊站 透露,原定三月份发布的华为新旗舰P70系列延期发布,预计4月份上市。
而博主@定焦数码 爆料,华为的P70系列在定位上已经超过了Mate60,成为了重要的旗舰系列之一。它肩负着重返影像领域顶尖的使命。那么这次P70会带来哪些令人惊艳的创新呢?
根据目前爆料的消息来看,华为P70系列将推出三个版本,其中P70和P70 Pro采用了三角形的摄像头模组设计,而P70 Art则采用了与上一代P60 Art相似的不规则形状设计。这样的外观是否好看见仁见智,但辨识度绝对拉满。
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