我正在尝试提取 .mdb 数据库的架构，以便可以在其他地方重新创建数据库。
我怎样才能完成这样的事情？
【问题讨论】：
标签： ms-access ms-jet-ace
可以用 VBA 做一些事情。例如，这里是为具有本地表的数据库创建脚本的开始。
Dim db As Database
Dim tdf As TableDef
Dim fld As DAO.Field
Dim ndx As DAO.Index
Dim strSQL As String
Dim strFlds As String
Dim strCn As String
Dim fs, f
Set db = CurrentDb
Set fs = CreateObject("Scripting.FileSystemObject")
Set f = fs.CreateTextFile("C:\Docs\Schema.txt")
For Each tdf In db.TableDefs
If Left(tdf.Name, 4) <> "Msys" Then
strSQL = "strSQL=""CREATE TABLE [" & tdf.Name & "] ("
strFlds = ""
For Each fld In tdf.Fields
strFlds = strFlds & ",[" & fld.Name & "] "
Select Case fld.Type
Case dbText
'No look-up fields
strFlds = strFlds & "Text (" & fld.Size & ")"
Case dbLong
If (fld.Attributes And dbAutoIncrField) = 0& Then
strFlds = strFlds & "Long"
Else
strFlds = strFlds & "Counter"
End If
Case dbBoolean
strFlds = strFlds & "YesNo"
Case dbByte
strFlds = strFlds & "Byte"
Case dbInteger
strFlds = strFlds & "Integer"
Case dbCurrency
strFlds = strFlds & "Currency"
Case dbSingle
strFlds = strFlds & "Single"
Case dbDouble
strFlds = strFlds & "Double"
Case dbDate
strFlds = strFlds & "DateTime"
Case dbBinary
strFlds = strFlds & "Binary"
Case dbLongBinary
strFlds = strFlds & "OLE Object"
Case dbMemo
If (fld.Attributes And dbHyperlinkField) = 0& Then
strFlds = strFlds & "Memo"
Else
strFlds = strFlds & "Hyperlink"
End If
Case dbGUID
strFlds = strFlds & "GUID"
End Select
Next
strSQL = strSQL & Mid(strFlds, 2) & " )""" & vbCrLf & "Currentdb.Execute strSQL"
f.WriteLine vbCrLf & strSQL
'Indexes
For Each ndx In tdf.Indexes
If ndx.Unique Then
strSQL = "strSQL=""CREATE UNIQUE INDEX "
Else
strSQL = "strSQL=""CREATE INDEX "
End If
strSQL = strSQL & "[" & ndx.Name & "] ON [" & tdf.Name & "] ("
strFlds = ""
For Each fld In tdf.Fields
strFlds = strFlds & ",[" & fld.Name & "]"
Next
strSQL = strSQL & Mid(strFlds, 2) & ") "
strCn = ""
If ndx.Primary Then
strCn = " PRIMARY"
End If
If ndx.Required Then
strCn = strCn & " DISALLOW NULL"
End If
If ndx.IgnoreNulls Then
strCn = strCn & " IGNORE NULL"
End If
If Trim(strCn) <> vbNullString Then
strSQL = strSQL & " WITH" & strCn & " "
End If
f.WriteLine vbCrLf & strSQL & """" & vbCrLf & "Currentdb.Execute strSQL"
Next
End If
Next
f.Close
【讨论】：
现在这是一个古老的问题，但不幸的是长期存在:(
我认为此代码可能对寻找解决方案的其他人有用。它旨在通过 cscript 从命令行运行，因此无需将代码导入您的 Access 项目。与Oliver in How do you use version control with Access development 中的代码类似（并受其启发）。
' Usage:
' CScript //Nologo ddl.vbs <input mdb file> > <output>
'
' Outputs DDL statements for tables, indexes, and relations from Access file
' (.mdb, .accdb) <input file> to stdout.
' Requires Microsoft Access.
'
' NOTE: Adapted from code from "polite person" + Kevin Chambers - see:
' http://www.mombu.com/microsoft/comp-databases-ms-access/t-exporting-jet-table-metadata-as-text-119667.html
'
Option Explicit
Dim stdout, fso
Dim strFile
Dim appAccess, db, tbl, idx, rel
Set stdout = WScript.StdOut
Set fso = CreateObject("Scripting.FileSystemObject")
' Parse args
If (WScript.Arguments.Count = 0) then
MsgBox "Usage: cscript //Nologo ddl.vbs access-file", vbExclamation, "Error"
Wscript.Quit()
End if
strFile = fso.GetAbsolutePathName(WScript.Arguments(0))
' Open mdb file
Set appAccess = CreateObject("Access.Application")
appAccess.OpenCurrentDatabase strFile
Set db = appAccess.DBEngine(0)(0)
' Iterate over tables
' create table statements
For Each tbl In db.TableDefs
If Not isSystemTable(tbl) And Not isHiddenTable(tbl) Then
stdout.WriteLine getTableDDL(tbl)
stdout.WriteBlankLines(1)
' Iterate over indexes
' create index statements
For Each idx In tbl.Indexes
stdout.WriteLine getIndexDDL(tbl, idx)
Next
stdout.WriteBlankLines(2)
End If
Next
' Iterate over relations
' alter table add constraint statements
For Each rel In db.Relations
Set tbl = db.TableDefs(rel.Table)
If Not isSystemTable(tbl) And Not isHiddenTable(tbl) Then
stdout.WriteLine getRelationDDL(rel)
stdout.WriteBlankLines(1)
End If
Next
Function getTableDDL(tdef)
Const dbBoolean = 1
Const dbByte = 2
Const dbCurrency = 5
Const dbDate = 8
Const dbDouble = 7
Const dbInteger = 3
Const dbLong = 4
Const dbDecimal = 20
Const dbFloat = 17
Const dbMemo = 12
Const dbSingle = 6
Const dbText = 10
Const dbGUID = 15
Const dbAutoIncrField = 16
Dim fld
Dim sql
Dim ln, a
sql = "CREATE TABLE " & QuoteObjectName(tdef.name) & " ("
ln = vbCrLf
For Each fld In tdef.fields
sql = sql & ln & " " & QuoteObjectName(fld.name) & " "
Select Case fld.Type
Case dbBoolean 'Boolean
a = "BIT"
Case dbByte 'Byte
a = "BYTE"
Case dbCurrency 'Currency
a = "MONEY"
Case dbDate 'Date / Time
a = "DATETIME"
Case dbDouble 'Double
a = "DOUBLE"
Case dbInteger 'Integer
a = "INTEGER"
Case dbLong 'Long
'test if counter, doesn't detect random property if set
If (fld.Attributes And dbAutoIncrField) Then
a = "COUNTER"
Else
a = "LONG"
End If
Case dbDecimal 'Decimal
a = "DECIMAL"
Case dbFloat 'Float
a = "FLOAT"
Case dbMemo 'Memo
a = "MEMO"
Case dbSingle 'Single
a = "SINGLE"
Case dbText 'Text
a = "VARCHAR(" & fld.Size & ")"
Case dbGUID 'Text
a = "GUID"
Case Else
'>>> raise error
MsgBox "Field " & tdef.name & "." & fld.name & _
" of type " & fld.Type & " has been ignored!!!"
End Select
sql = sql & a
If fld.Required Then _
sql = sql & " NOT NULL "
If Len(fld.DefaultValue) > 0 Then _
sql = sql & " DEFAULT " & fld.DefaultValue
ln = ", " & vbCrLf
Next
sql = sql & vbCrLf & ");"
getTableDDL = sql
End Function
Function getIndexDDL(tdef, idx)
Dim sql, ln, myfld
If Left(idx.name, 1) = "{" Then
'ignore, GUID-type indexes - bugger them
ElseIf idx.Foreign Then
'this index was created by a relation. recreating the
'relation will create this for us, so no need to do it here
Else
ln = ""
sql = "CREATE "
If idx.Unique Then
sql = sql & "UNIQUE "
End If
sql = sql & "INDEX " & QuoteObjectName(idx.name) & " ON " & _
QuoteObjectName(tdef.name) & "( "
For Each myfld In idx.fields
sql = sql & ln & QuoteObjectName(myfld.name)
ln = ", "
Next
sql = sql & " )"
If idx.Primary Then
sql = sql & " WITH PRIMARY"
ElseIf idx.IgnoreNulls Then
sql = sql & " WITH IGNORE NULL"
ElseIf idx.Required Then
sql = sql & " WITH DISALLOW NULL"
End If
sql = sql & ";"
End If
getIndexDDL = sql
End Function
' Returns the SQL DDL to add a relation between two tables.
' Oddly, DAO will not accept the ON DELETE or ON UPDATE
' clauses, so the resulting sql must be executed through ADO
Function getRelationDDL(myrel)
Const dbRelationUpdateCascade = 256
Const dbRelationDeleteCascade = 4096
Dim mytdef
Dim myfld
Dim sql, ln
With myrel
sql = "ALTER TABLE " & QuoteObjectName(.ForeignTable) & _
" ADD CONSTRAINT " & QuoteObjectName(.name) & " FOREIGN KEY ( "
ln = ""
For Each myfld In .fields 'ie fields of the relation
sql = sql & ln & QuoteObjectName(myfld.ForeignName)
ln = ","
Next
sql = sql & " ) " & "REFERENCES " & _
QuoteObjectName(.table) & "( "
ln = ""
For Each myfld In .fields
sql = sql & ln & QuoteObjectName(myfld.name)
ln = ","
Next
sql = sql & " )"
If (myrel.Attributes And dbRelationUpdateCascade) Then _
sql = sql & " ON UPDATE CASCADE"
If (myrel.Attributes And dbRelationDeleteCascade) Then _
sql = sql & " ON DELETE CASCADE"
sql = sql & ";"
End With
getRelationDDL = sql
End Function
Function isSystemTable(tbl)
Dim nAttrib
Const dbSystemObject = -2147483646
isSystemTable = False
nAttrib = tbl.Attributes
isSystemTable = (nAttrib <> 0 And ((nAttrib And dbSystemObject) <> 0))
End Function
Function isHiddenTable(tbl)
Dim nAttrib
Const dbHiddenObject = 1
isHiddenTable = False
nAttrib = tbl.Attributes
isHiddenTable = (nAttrib <> 0 And ((nAttrib And dbHiddenObject) <> 0))
End Function
Function QuoteObjectName(str)
QuoteObjectName = "[" & str & "]"
End Function
如果您也想导出查询定义，this question 应该会有所帮助。这有点不同，因为您通常不会使用普通 DDL CREATE VIEW foo AS ... 语法创建查询定义，实际上我不确定您是否可以（？）
但这是我为将查询备份到单独的 .sql 文件而编写的一小段脚本（它是用于备份所有前端数据库代码的较大脚本的一部分，请参阅 Oliver 对this question 的回答）。
Dim oApplication
Set oApplication = CreateObject("Access.Application")
oApplication.OpenCurrentDatabase sMyAccessFilePath
oApplication.Visible = False
For Each myObj In oApplication.DBEngine(0)(0).QueryDefs
writeToFile sExportpath & "\queries\" & myObj.Name & ".sql", myObj.SQL
Next
Function writeToFile(path, text)
Dim fso, st
Set fso = CreateObject("Scripting.FileSystemObject")
Set st = fso.CreateTextFile(path, True)
st.Write text
st.Close
End Function
【讨论】：
以下 C# 概述了如何从 .mdb 文件中获取架构。
获取到数据库的连接：
String f = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + "database.mdb";
OleDbConnection databaseConnection = new OleDbConnection(f);
databaseConnection.Open();
获取每个表的名称：
DataTable dataTable = databaseConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
int numTables = dataTable.Rows.Count;
for (int tableIndex = 0; tableIndex < numTables; ++tableIndex)
{
String tableName = dataTable.Rows[tableIndex]["TABLE_NAME"].ToString();
获取每个表的字段：
DataTable schemaTable = databaseConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, new object[] { null, null, tableName, null });
foreach (DataRow row in schemaTable.Rows)
{
String fieldName = row["COLUMN_NAME"].ToString(); //3
String fieldType = row["DATA_TYPE"].ToString(); // 11
String fieldDescription = row["DESCRIPTION"].ToString(); //27
}
}
3、11 和 27 来自哪里？我通过调试器检查DataRow.ItemArray 找到了它们，有人知道“正确”的方法吗？
【讨论】：
如果您乐于使用纯 Access SQL 以外的其他东西，则可以保留 ADOX 对象的集合并使用这些对象重新创建表结构。
示例（在 Python 中，目前不重新创建关系和索引，因为我正在处理的项目不需要它）：
import os
import sys
import datetime
import comtypes.client as client
class Db:
def __init__(self, original_con_string = None, file_path = None,
new_con_string = None, localise_links = False):
self.original_con_string = original_con_string
self.file_path = file_path
self.new_con_string = new_con_string
self.localise_links = localise_links
def output_table_structures(self, verbosity = 0):
if os.path.exists(self.file_path):
if not os.path.isdir(self.file_path):
raise Exception("file_path must be a directory!")
else:
os.mkdir(self.file_path)
cat = client.CreateObject("ADOX.Catalog")
cat.ActiveConnection = self.original_con_string
linked_tables = ()
for table in cat.Tables:
if table.Type == u"TABLE":
f = open(self.file_path + os.path.sep +
"Tablestruct_" + table.Name + ".txt", "w")
conn = client.CreateObject("ADODB.Connection")
conn.ConnectionString = self.original_con_string
rs = client.CreateObject("ADODB.Recordset")
conn.Open()
rs.Open("SELECT TOP 1 * FROM [%s];" % table.Name, conn)
for field in rs.Fields:
col = table.Columns[field.Name]
col_details = (col.Name, col.Type, col.DefinedSize,
col.Attributes)
property_dict = {}
property_dict["Autoincrement"] = (
col.Properties["Autoincrement"].Value)
col_details += property_dict,
f.write(repr(col_details) + "\n")
rs.Close()
conn.Close()
f.close()
if table.Type == u"LINK":
table_details = table.Name,
table_details += table.Properties(
"Jet OLEDB:Link DataSource").Value,
table_details += table.Properties(
"Jet OLEDB:Link Provider String").Value,
table_details += table.Properties(
"Jet OLEDB:Remote Table Name").Value,
linked_tables += table_details,
if linked_tables != ():
f = open(self.file_path + os.path.sep +
"linked_list.txt", "w")
for t in linked_tables:
f.write(repr(t) + "\n")
cat.ActiveConnection.Close()
类似的反向函数使用第二个连接字符串重建数据库。
【讨论】：
您可以使用 ACE/Jet OLE DB Provider 和 ADO Connection 对象的 OpenSchema 方法来获取作为 Recordset 的架构信息（这可以说比 Collection 更好，因为它可以进行过滤、排序等）。
基本方法是使用 adSchemaTables 获取基表（而不是 VIEW），然后使用每个 TABLE_NAME 获取 ORDINAL_POSITION、!DATA_TYPE、!IS_NULLABLE、!COLUMN_HASDEFAULT、!COLUMN_DEFAULT、!CHARACTER_MAXIMUM_LENGTH、!NUMERIC_PRECISION、!NUMERIC_SCALE 的 adSchemaColumns .
adSchemaPrimaryKeys 很简单。 adSchemaIndexes 是您可以找到 UNIQUE 约束的地方，不确定这些是否可以与唯一索引区分开来，以及插入 adSchemaForeignKeys 行集的外键名称，例如（伪代码）：
rsFK.Filter = "FK_NAME = '" & !INDEX_NAME & "'")
--注意 Jet 3.51 允许基于无名 PK 的 FK (!!)
验证规则和检查约束的名称可以在 adSchemaTableConstraints 行集中找到，使用 OpenSchema 调用中的表名，然后使用对 adSchemaCheckConstraints 行集的调用中的名称，过滤 CONSTRAINT_TYPE = 'CHECK'（一个陷阱是一个名为 'ValidationRule' + Chr$(0) 的约束，因此最好从名称中转义空字符）。请记住，ACE/Jet 验证规则可以是行级或表级（CHECK 约束始终是表级），因此您可能需要在过滤器中使用表名：对于 adSchemaTableConstraints 是 [].[].ValidationRule将是 adSchemaCheckConstraints 中的 [].ValidationRule。另一个问题（疑似错误）是字段的宽度为 255 个字符，因此任何超过 255 个字符的验证规则/检查约束定义都将具有 NULL 值。
adSchemaViews，用于基于非参数化 SELECT SQL DML 的 Access Query 对象，非常简单；您可以使用 adSchemaColumns 中的 VIEW 名称来获取列详细信息。
PROCEDURES 在 adSchemaProcedures 中，是所有其他类型的 Access Query 对象，包括参数化的 SELECT DML；对于后者，我更喜欢用 PROCEDURE_DEFINITION 中的 CREATE PROCEDURE PROCEDURE_NAME 替换 PARAMETERS 语法。不要打扰查看 adSchemaProcedureParameters，您不会找到任何东西：可以通过使用 ADOX 目录对象来枚举参数以返回 ADO 命令，例如（伪代码）：
Set Command = Catalog.Procedures(PROCEDURE_NAME).Command
然后为 .Name 枚举 Comm.Parameters 集合，为 DATA_TYPE 枚举 .Type，为 IS_NULLABLE 枚举 (.Attributes And adParamNullable)，为 COLUMN_HASDEFAULT 和 COLUMN_DEFAULT 枚举 .Value，.Size、.Precision、.NumericScale。
对于 ACE/Jet 特定的属性，例如 Unicode 压缩，您需要使用另一种对象。例如，可以使用 ADO 目录对象找到 Access-speak 中的长整数自动编号，例如（伪代码）：
bIsAutoincrement = Catalog.Tables(TABLE_NAME).Columns(COLUMN_NAME).Properties("Autoincrement").Value
祝你好运:)
【讨论】：
查看 docmd.TransferDatabase 命令。对于需要复制数据结构的构建集成，这可能是您的最佳选择
【讨论】：
比较他们 http://home.gci.net/~mike-noel/CompareEM-LITE/CompareEM.htm 将愉快地生成重新创建 MDB 所需的 VBA 代码。或者创建两个 MDB 之间差异的代码，以便您可以对现有的 BE MDB 进行版本升级。这有点古怪，但有效。注意它不支持新的 ACE (Access2007) ACCDB 等格式。
我一直在使用它。
（OneDayWhen 的编辑是正确的三分之一，错误的三分之二。）
【讨论】：
在 Access 中很难执行 DDL 脚本/查询。它可以完成，但你最好只创建数据库的副本 - 删除所有数据并压缩它。然后使用它的副本在其他地方重新创建数据库。
【讨论】：
非常有用的帖子！
我已修改脚本以生成 SQL Server 的数据定义语言。我认为它可能对某人有用，所以我分享它。我遇到的一个问题是 VBS 脚本会提取表中的所有字段作为索引。我还不确定如何解决这个问题，所以我只提取第一个字段。这适用于大多数主键。最后，并不是所有的数据类型都被证明了，但我想我得到了大部分。
Option Compare Database
Function exportTableDefs()
Dim db As Database
Dim tdf As TableDef
Dim fld As DAO.Field
Dim ndx As DAO.Index
Dim strSQL As String
Dim strFlds As String
Dim fs, f
Set db = CurrentDb
Set fs = CreateObject("Scripting.FileSystemObject")
Set f = fs.CreateTextFile("C:\temp\Schema.txt")
For Each tdf In db.TableDefs
If Left(tdf.Name, 4) <> "Msys" And Left(tdf.Name, 1) <> "~" Then
strSQL = "CREATE TABLE [" & tdf.Name & "] (" & vbCrLf
strFlds = ""
For Each fld In tdf.Fields
strFlds = strFlds & ",[" & fld.Name & "] "
Select Case fld.Type
Case dbText
'No look-up fields
strFlds = strFlds & "varchar (" & fld.SIZE & ")"
Case dbLong
If (fld.Attributes And dbAutoIncrField) = 0& Then
strFlds = strFlds & "bigint"
Else
strFlds = strFlds & "int IDENTITY(1,1)"
End If
Case dbBoolean
strFlds = strFlds & "bit"
Case dbByte
strFlds = strFlds & "tinyint"
Case dbInteger
strFlds = strFlds & "int"
Case dbCurrency
strFlds = strFlds & "decimal(10,2)"
Case dbSingle
strFlds = strFlds & "decimal(10,2)"
Case dbDouble
strFlds = strFlds & "Float"
Case dbDate
strFlds = strFlds & "DateTime"
Case dbBinary
strFlds = strFlds & "binary"
Case dbLongBinary
strFlds = strFlds & "varbinary(max)"
Case dbMemo
If (fld.Attributes And dbHyperlinkField) = 0& Then
strFlds = strFlds & "varbinary(max)"
Else
strFlds = strFlds & "?"
End If
Case dbGUID
strFlds = strFlds & "?"
Case Else
strFlds = strFlds & "?"
End Select
strFlds = strFlds & vbCrLf
Next
'' get rid of the first comma
strSQL = strSQL & Mid(strFlds, 2) & " )" & vbCrLf
f.WriteLine strSQL
strSQL = ""
'Indexes
For Each ndx In tdf.Indexes
If Left(ndx.Name, 1) <> "~" Then
If ndx.Primary Then
strSQL = "ALTER TABLE " & tdf.Name & " ADD CONSTRAINT " & tdf.Name & "_primary" & " PRIMARY KEY CLUSTERED ( " & vbCrLf
Else
If ndx.Unique Then
strSQL = "CREATE UNIQUE NONCLUSTERED INDEX "
Else
strSQL = "CREATE NONCLUSTERED INDEX "
End If
strSQL = strSQL & "[" & tdf.Name & "_" & ndx.Name & "] ON [" & tdf.Name & "] ("
End If
strFlds = ""
''' Assume that the index is only for the first field. This will work for most primary keys
''' Not sure how to get just the fields in the index
For Each fld In tdf.Fields
strFlds = strFlds & ",[" & fld.Name & "] ASC "
Exit For
Next
strSQL = strSQL & Mid(strFlds, 2) & ") "
End If
Next
f.WriteLine strSQL & vbCrLf
End If
Next
f.Close
End Function
【讨论】：
Roland 的上述回答（由 Tobias 编辑）对我有用，但有一些变化。首先我解决了在主键中查找所有字段的问题；那么索引sql代码的写入文件是在错误的地方： 选项比较数据库
Function exportTableDefs()
Dim db As Database
Dim tdf As TableDef
Dim fld As DAO.Field
Dim ndx As DAO.Index
Dim strSQL As String
Dim strFlds As String
Dim fs, f
Set db = CurrentDb
Set fs = CreateObject("Scripting.FileSystemObject")
Set f = fs.CreateTextFile("C:\temp\Schema.txt")
For Each tdf In db.TableDefs
If Left(tdf.Name, 4) <> "Msys" And Left(tdf.Name, 1) <> "~" Then
strSQL = "CREATE TABLE [" & tdf.Name & "] (" & vbCrLf
strFlds = ""
For Each fld In tdf.Fields
strFlds = strFlds & ",[" & fld.Name & "] "
Select Case fld.Type
Case dbText
'No look-up fields
strFlds = strFlds & "varchar (" & fld.SIZE & ")"
Case dbLong
If (fld.Attributes And dbAutoIncrField) = 0& Then
strFlds = strFlds & "bigint"
Else
strFlds = strFlds & "int IDENTITY(1,1)"
End If
Case dbBoolean
strFlds = strFlds & "bit"
Case dbByte
strFlds = strFlds & "tinyint"
Case dbInteger
strFlds = strFlds & "int"
Case dbCurrency
strFlds = strFlds & "decimal(10,2)"
Case dbSingle
strFlds = strFlds & "decimal(10,2)"
Case dbDouble
strFlds = strFlds & "Float"
Case dbDate
strFlds = strFlds & "DateTime"
Case dbBinary
strFlds = strFlds & "binary"
Case dbLongBinary
strFlds = strFlds & "varbinary(max)"
Case dbMemo
If (fld.Attributes And dbHyperlinkField) = 0& Then
strFlds = strFlds & "varbinary(max)"
Else
strFlds = strFlds & "?"
End If
Case dbGUID
strFlds = strFlds & "?"
Case Else
strFlds = strFlds & "?"
End Select
strFlds = strFlds & vbCrLf
Next
'' get rid of the first comma
strSQL = strSQL & Mid(strFlds, 2) & " )" & vbCrLf
f.WriteLine strSQL
strSQL = ""
'Indexes
For Each ndx In tdf.Indexes
If Left(ndx.Name, 1) <> "~" Then
If ndx.Primary Then
strSQL = "ALTER TABLE " & tdf.Name & " ADD CONSTRAINT " & tdf.Name & "_primary" & " PRIMARY KEY CLUSTERED ( " & vbCrLf
Else
If ndx.Unique Then
strSQL = "CREATE UNIQUE NONCLUSTERED INDEX "
Else
strSQL = "CREATE NONCLUSTERED INDEX "
End If
strSQL = strSQL & "[" & tdf.Name & "_" & ndx.Name & "] ON [" & tdf.Name & "] ("
End If
strFlds = ""
''' use the ndx collection rather than tdf
For Each fld In ndx.Fields
strFlds = strFlds & ",[" & fld.Name & "] ASC "
Exit For
Next
strSQL = strSQL & Mid(strFlds, 2) & ") "
End If
''' write to file for each iteration of the loop to get multiple indexes
f.WriteLine strSQL & vbCrLf
Next
End If
Next
f.Close
End Function
【讨论】：