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创建一张空表: Sql="Create TABLE [表名]"
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
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] <= '2007-1-1')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")
ACCESS新建数据库和表还不简单,有了表字段初始化就更简单
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<%
session("tablen")="news" 'news是已存在的表名 session("fieldsn")="c" '要添加的字段名 connectionstring="provider=microsoft.jet.oledb.4.0;data source="&server.MapPath("data/qq.mdb") set conn=server.createobject("adodb.connection") conn.OPEN connectionstring jhsql = " Alter Table "&session("tablen")&" add column "&session("fieldsn")&" real " conn.execute(jhsql) %>================================
生成数据表,添加字段,其中id字段为自动增加,测试通过~~
Sub GenAutoIncrementFld()
set cn=server.CreateObject("ADODB.Connection") set clx=server.CreateObject("ADOX.Column") set cat=server.CreateObject("ADOX.Catalog") set tblnam=server.CreateObject("ADOX.Table")cn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:\网站制作\asp操作mdb\db\test.mdb"
Set cat.ActiveConnection = cn
tblnam.Name = "Test"
clx.ParentCatalog = catclx.Type = 3 clx.Name = "Id" clx.Properties("AutoIncrement") = true tblnam.Columns.Append clx tblnam.Columns.Append "DataField",130,20 cat.Tables.Append tblnam
Set clx = Nothing
Set cat = Nothing cn.Close Set cn = Nothing End Subcall GenAutoIncrementFld
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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 Const adArray = &H2000
本文转自寒意博客园博客,原文链接:http://www.cnblogs.com/hnyei/archive/2012/02/23/2364812.html,如需转载请自行联系原作者