Home  >  Article  >  Database  >  SQL Access创建表

SQL Access创建表

WBOY
WBOYOriginal
2016-06-07 15:42:551254browse

一、创建一张空表: Sql="Create TABLE [表名]" 二、创建一张有字段的表: Sql="Create TABLE [表名] ([字段名1] MEMO NOT NULL, [字段名2] MEMO, [字段名3] COUNTER NOT NULL, [字段名4] DATETIME, [字段名5] TEXT(200), [字段名6] TEXT(200)) 字段类型: 2

一、创建一张空表:

Sql="Create TABLE [表名]"

二、创建一张有字段的表:

Sql="Create TABLE [表名]

([字段名1] MEMO NOT NULL,

[字段名2] MEMO,

[字段名3] COUNTER NOT NULL,

[字段名4] DATETIME,

[字段名5] TEXT(200),

 [字段名6] TEXT(200))

 

 

字段类型:

2 : "SmallInt", // 整型

3 : "Int", // 长整型

4 : "Real", // 单精度型

5 : "Float", // 双精度型

6 : "Money", // 货币

7 : "DateTime", // 日期时间

11 : "Bit", // 是否

13 : "TimeStamp",

17 : "TinyInt", // 字节

72 : "UniqueIdentifier", // 同步复制 ID

128 : "Binary",

129 : "Char",

130 : "NChar",

131 : "Decimal", // 小数

133 : "DateTime",

135 : "SmallDateTime",

200 : "VarChar",

 201 : "Text",

202 : "VarChar", // 文本

203 : "Text", // 备注

204 : "Binary", // 二进制

205 : "Image" // OLE 对象以下字段为无编码字段(NChar、NVarchar、NText型)

8,128,130,202,203,204,205 以下字段为按当前系统内码编码的字段(Asp中可用CodePage=936纠正为gb2312内码) 129,200,201

 

三、

在现有的表中增加字段:

 Sql="alter table [表名] add column [字段名] varchar(200)"

修改字段类型:

Sql="alter table [表名] Alter COLUMN 字段名] varchar(50)"

删除表:

Sql="Drop table [表名]"

删除字段:

sql="alter table [表名] drop [字段名]"

修改字段:

Alter TABLE [表名] Alter COLUMN [字段名] 类型(大小) NULL

新建约束:Alter TABLE [表名] ADD CONSTRAINT 约束名 CHECK ([约束字段]

删除约束:Alter TABLE [表名] Drop CONSTRAINT 约束名

新建默认值:Alter TABLE [表名] ADD CONSTRAINT 默认值名 DEFAULT 'Gziu.CoM' FOR [字段名]

删除默认值:Alter TABLE [表名] Drop CONSTRAINT 默认值名 ======================================= conn.open connstr sql="alter table [tablename] add hehe char(20)" conn.execute(sql) response.write("添加成功")

 

 字段类型对应数值 ''

---- DataTypeEnum Values ----

 Const adEmpty = 0

Const adTinyInt = 16

Const adSmallInt = 2

Const adInteger = 3

Const adBigInt = 20

Const adUnsignedTinyInt = 17

 Const adUnsignedSmallInt = 18

Const adUnsignedInt = 19

Const adUnsignedBigInt = 21

Const adSingle = 4

Const adDouble = 5

Const adCurrency = 6

Const adDecimal = 14

Const adNumeric = 131

Const adBoolean = 11

Const adError = 10

Const adUserDefined = 132

Const adVariant = 12

Const adIDispatch = 9

Const adIUnknown = 13

Const adGUID = 72

Const adDate = 7

Const adDBDate = 133

Const adDBTime = 134

Const adDBTimeStamp = 135

Const adBSTR = 8

Const adChar = 129

 Const adVarChar = 200

Const adLongVarChar = 201

Const adWChar = 130

Const adVarWChar = 202

 Const adLongVarWChar = 203

Const adBinary = 128

Const adVarBinary = 204

Const adLongVarBinary = 205

Const adChapter = 136

Const adFileTime = 64

Const adPropVariant = 138

Const adVarNumeric = 139

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article:jersey2搭建流程Next article:让团队增值的1+1>2效应