如何遍历字段名称？

SQL Server中遍历指定表的字段及属性

SELECT Column_name,IS_NULLABLE,DATA_TYPE
FROM INFORMATION_SCHEMA.COLUMNS
WHERE (TABLE_NAME = ‘myTableName’)

TABLE_NAME：表名；
Column_name：列名；
IS_NULLABLE：是否允许为空；
DataType：系统数据类型；
ORDINAL_POSITION：列标识号；
COLUMN_DEFAULT：列的默认值；
CHARACTER_OCTET_LENGTH：以字节为单位的最大长度，适于二进制数据、字符数据，或者文本和图像数据。否则，返回 NULL
Access :
<%
Const adSchemaTables = 20
adSchemaColumns = 4
dim Conn,db
dim ConnStr
db=”temp.mdb”           ‘ACCESS数据库的文件名，请使用相对于网站根目录的的绝对路径
ConnStr = “Provider=Microsoft.Jet.OLEDB.4.0;Data Source=” & Server.MapPath(db)
Set conn = Server.CreateObject(“ADODB.Connection”)
conn.Open connstr

Dim rstSchema
Dim I
        
Set rstSchema = Conn.OpenSchema(adSchemaTables)
    
Do while not rstSchema.EOF
   response.write(“Table  name:  “& rstSchema(“TABLE_NAME”) & vbCr & _
    “Table  type:  ” & rstSchema(“TABLE_TYPE”) & vbCr)
 response.write(“<br/>”)
 I = I + 1
 rstSchema.MoveNext
Loop
rstSchema.Close
 
conn.Close
%>

Access
Access 系统表 MsysObjects 包含了数据库对象列表。尽管未在文档中记载，你仍可通过查询它来获取你想要的。但是默认情况下无法操作系统表，必须手动设定权限收才能查询系统表。
请参考以下动画：如何获取对msysobject的操作权限 http://blog.iyi.cn/user/david/archives/IMAGES/msobject.swf

ps:在做上面步骤前，请在工具-选型－勾选显示系统对象

使用下列 SQL 语句来获取你想要的

查询:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>”~”) AND (MSysObjects.Type)=5 ORDER BY MSysObjects.Name;

窗体:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>”~”) AND (MSysObjects.Type)=-32768 ORDER BY MSysObjects.Name;

表:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>”~”) AND (Left$([Name],4) <> “Msys”) AND (MSysObjects.Type)=1 ORDER BY MSysObjects.Name;

报表:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>”~”) AND (MSysObjects.Type)= -32764 ORDER BY MSysObjects.Name;

模块:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>”~”) AND (MSysObjects.Type)= -32761 ORDER BY MSysObjects.Name;

宏:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>”~”) AND (MSysObjects.Type)= -32766 ORDER BY MSysObjects.Name;

转载自：https://blog.csdn.net/itblog/article/details/770826