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 ID128 : "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 connstrsql="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 ======================================= <% 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 = cat        clx.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 = NothingEnd Sub call GenAutoIncrementFld =================================== 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

评论