本文共 8176 字，大约阅读时间需要 27 分钟。
| DataType | Value | Length | Data Length |
|---|---|---|---|
| BIGINT | 996857543543543 | 15 | 8 |
| INT | 543543 | 6 | 4 |
| SMALLINT | 32765 | 5 | 2 |
| TINYINT | 254 | 3 | 1 |
| BIT | True | 1 | 1 |
| DECIMAL | 765.5432321 | 11 | 9 |
| NUMERIC | 432.6544 | 8 | 5 |
| MONEY | 543.1234 | 6 | 8 |
| SMALLMONEY | 543.1234 | 6 | 4 |
| FLOAT | 5.4E+54 | 8 | 8 |
| REAL | 2.43E+24 | 9 | 4 |
| DATETIME | 8/31/2003 11:55:25 PM | 19 | 8 |
| SMALLDATETIME | 8/31/2003 11:55:00 PM | 19 | 4 |
| CHAR | QWE | 3 | 4 |
| VARCHAR | Variable! | 9 | 9 |
| TEXT | 307 | ||
| NCHAR | WIDE | 4 | 8 |
| NVARCHAR | 0 | 0 | |
| NTEXT | 614 | ||
| GUID | {58F94A80-B839-4B35-B73C-7F4B4D336C3C} | 36 | 16 |
CREATE PROCEDURE "dbo"."DataTypeTester" @myBigInt bigint , @myInt int , @mySmallint smallint , @myTinyint tinyint , @myBit bit , @myDecimal decimal(10, 7) , @myNumeric numeric(7, 4) , @myMoney money , @mySmallMoney smallmoney , @myFloat float , @myReal real , @myDatetime datetime , @mySmallDatetime smalldatetime , @myChar char(4) , @myVarchar varchar(10) , @myText text , @myNChar nchar(4) , @myNVarchar nvarchar(10) , @myNText ntext , @myGuid uniqueidentifier AS SELECT 'BIGINT' "DataType", @myBigInt "Value" , LEN(@myBigInt) "Length" , DATALENGTH(@myBigInt) "Data Length" SELECT 'INT' , @myInt , LEN(@myInt) , DATALENGTH(@myInt) SELECT 'SMALLINT' , @mySmallint , LEN(@mySmallint) , DATALENGTH(@mySmallint) SELECT 'TINYINT' , @myTinyint , LEN(@myTinyint) , DATALENGTH(@myTinyint) SELECT 'BIT' , @myBit , LEN(@myBit) , DATALENGTH(@myBit) SELECT 'DECIMAL' , @myDecimal , LEN(@myDecimal) , DATALENGTH(@myDecimal) SELECT 'NUMERIC' , @myNumeric , LEN(@myNumeric) , DATALENGTH(@myNumeric) SELECT 'MONEY' , @myMoney , LEN(CAST(@mySmallMoney as varchar)) , DATALENGTH(@myMoney) SELECT 'SMALLMONEY' , @mySmallMoney , LEN(CAST(@mySmallMoney as varchar)) , DATALENGTH(@mySmallMoney) SELECT 'FLOAT' , @myFloat , LEN(@myFloat) , DATALENGTH(@myFloat) SELECT 'REAL' , @myReal , LEN(@myReal) , DATALENGTH(@myReal) SELECT 'DATETIME' , @myDatetime , LEN(@myDatetime) , DATALENGTH(@myDatetime) SELECT 'SMALLDATETIME' , @mySmallDatetime , LEN(@mySmallDatetime) , DATALENGTH(@mySmallDatetime) SELECT 'CHAR' , @myChar , LEN(@myChar) , DATALENGTH(@myChar) SELECT 'VARCHAR' , @myVarchar , LEN(@myVarchar) , DATALENGTH(@myVarchar) SELECT 'TEXT' , '' , '' , DATALENGTH(@myText) SELECT 'NCHAR' , @myNChar , LEN(@myNChar) , DATALENGTH(@myNChar) SELECT 'NVARCHAR' , @myNVarchar , LEN(@myNVarchar) , DATALENGTH(@myNVarchar) SELECT 'NTEXT' , '' , '' , DATALENGTH(@myNText) SELECT 'GUID' , @myGuid , LEN(@myGuid) , DATALENGTH(@myGuid) -- TODO: READTEXT should do this... /* , @myText "text" , @myNText "ntext" */ RETURN(0)Code:
<!--#include virtual="/testsite/global_include.asp" --> <% Dim conn 'As ADODB.Connection Dim cmd 'As ADODB.Command Dim prm 'As ADODB.Parameter Dim rs 'As ADODB.Recordset Dim ret 'As Long Dim proc 'As String Dim allData() 'As Variant Dim colNames() 'As Variant Dim i 'As Long Dim datetime 'As DateTime Const StoredProcedure = "[dbo].[DataTypeTester]" Const titleString = "<html><head><title>ADO Parameter Test 3 / Multiple Recordset Tester</title> rel=""stylesheet"" href=""/Templates/style.css"" type=""text/css"" /></head><body><div align=""left""><h3>A example of how to retrieve multiple recordsets from ADO and how to set parameters in ADO for SQL Server Stored Procedures</h3>" ReDim allData(0) ' initialize array dimension datetime = Now() Response.Write titleString Set conn = Server.CreateObject("ADODB.Connection") Set cmd = Server.CreateObject("ADODB.Command") conn.Open Application("connectionString") With cmd Set .ActiveConnection = conn .CommandText = StoredProcedure ' always use ADO constants .CommandType = adCmdStoredProc ' Check into the NamedParameters property at some point ' It doesn't require the order to be enforced, but it is always a good idea to enforce it anyway (for the documentation aspect of coding) ' RETURN parameter needs to be first .Parameters.Append cmd.CreateParameter("RETURN", adInteger, adParamReturnValue, 4) .Parameters.Append .CreateParameter("@myBigInt", adBigInt, adParamInput, 8, 996857543543543) .Parameters.Append .CreateParameter("@myInt", adInteger, adParamInput, 4, 543543) .Parameters.Append .CreateParameter("@mySmallint", adSmallInt, adParamInput, 2, 32765) .Parameters.Append .CreateParameter("@myTinyint", adTinyInt, adParamInput, 1, 254) .Parameters.Append .CreateParameter("@myBit", adBoolean, adParamInput, 4, True) ' Only Decimal and Numeric needs Precision and NumericScale .Parameters.Append .CreateParameter("@myDecimal", adDecimal, adParamInput, 9, 765.5432321) With .Parameters.Item("@myDecimal") .Precision = 10 .NumericScale = 7 End With Set prm = .CreateParameter("@myNumeric", adNumeric, adParamInput, 5, 432.6544) prm.Precision = 7 prm.NumericScale = 4 .Parameters.Append prm Set prm = Nothing .Parameters.Append .CreateParameter("@myMoney", adCurrency, adParamInput, 8, 543.1234) .Parameters.Append .CreateParameter("@mySmallMoney", adCurrency, adParamInput, 4, 543.1234) .Parameters.Append .CreateParameter("@myFloat", adDouble, adParamInput, 8, 5.4E+54) .Parameters.Append .CreateParameter("@myReal", adSingle, adParamInput, 4, 2.43E+24) .Parameters.Append .CreateParameter("@myDatetime", adDBTimeStamp, adParamInput, 8, datetime) .Parameters.Append .CreateParameter("@mySmallDatetime", adDBTimeStamp, adParamInput, 4, datetime) .Parameters.Append .CreateParameter("@myChar", adChar, adParamInput, 4, "QWE") .Parameters.Append .CreateParameter("@myVarchar", adVarchar, adParamInput, 10, "Variable!") .Parameters.Append .CreateParameter("@myText", adLongVarChar, adParamInput, Len(titleString)) .Parameters.Item("@myText").AppendChunk titleString .Parameters.Append .CreateParameter("@myNChar", adWChar, adParamInput, 4, "WIDE") .Parameters.Append .CreateParameter("@myNVarchar", adVarWchar, adParamInput, 10, "") .Parameters.Append .CreateParameter("@myNText", adLongVarWChar, adParamInput, Len(titleString)) .Parameters.Item("@myNText").AppendChunk titleString ' note the difference in these - without the {} the string implicitly converts ' the adVarChar version is of course commented out '.Parameters.Append .CreateParameter("@myGuid", adVarChar, adParamInput, 36, "58F94A80-B839-4B35-B73C-7F4B4D336C3C") .Parameters.Append .CreateParameter("@myGuid", adGUID, adParamInput, 16, "{58F94A80-B839-4B35-B73C-7F4B4D336C3C}") Set rs = .Execute 'get column names ReDim colNames(rs.Fields.Count - 1) For i = 0 to rs.Fields.Count - 1 colNames(i) = rs.Fields.Item(i).Name Next Do While Not (rs Is Nothing) ' get initial recordset If Not rs.EOF Then ' for retrieving more than about 30 or so recordsets you would probably want to use a collection allData(UBound(allData)) = rs.GetRows(adGetRowsRest) End If ' this will be nothing if no recordset is returned Set rs = rs.NextRecordset ' resize array if needed If Not (rs Is Nothing) Then ReDim Preserve allData(UBound(allData) + 1) Loop ' must release the recordset before retrieving output parameters and/or the return value ReleaseObj rs, True, True ret = CStr(.Parameters.Item("RETURN").Value) End With ReleaseObj cmd, False, True ReleaseObj conn, True, True ' show stored procedure proc = GetStoredProcedureDefinition(StoredProcedure) With Response outputNamedGetRowsArray allData, colNames .Write "<br />" .Write "Return Value: " & ret & "<br /><br />" .Write "<pre>" & proc & "</pre>" End With displayAspFile Server.MapPath("adodb.command3.asp") Response.Write "</div></body></html>" %> 转载地址：http://cmfci.baihongyu.com/