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ÈçÌ⣬ÐèÒªÁ¬½ÓACCESSÊý¾Ý¿â£¬Ð»Ð»
C# code:

//Á¬½Ó×Ö·û´®
private static string connString = "Provider=Microsoft.Jet.OLEDB.4.0;;Data Source=DataBase.mdb";//DataBase.mdbÊý¾Ý¿âÎļþÃû

http://www.connectionstrings.com


DataBase.mdbÊÇÊý¾Ý¿âµÄÎļþÃû£¬µ«ÊÇÎÒÏëµÃÖªµÀÊý¾Ý¿âÎļþµÄ´æ·Å·¾¶² ......

ÔõÑùͨ¹ý±à³ÌʵÏÖMSSQL ºÍ AccessµÄÊý¾Ýͬ²½±¸·Ý

ÎÒÓÐÒ»¸öÕâÑùµÄÐèÇó£¬AÈí¼þµÄÊý¾Ý¿âÊÇaccess£¬BÈí¼þËùÓõÄÊý¾Ý¿âÊÇsql2005£¬µ±Óû§ÓÃBÈí¼þʱ£¬ÊµÏÖaccessµÄÊý¾Ý×Ô¶¯µ¼Èëµ½sql2005£¬ÇëÎÊÓÃʲô·½·¨¿ÉÒÔʵÏÖ£¬Çë´ó¼ÒÌṩһ¸ö˼·£¬Ð»Ð»£¡

SQL code:
--·½·¨1
1¡¢Ð´¸ö´æ´¢¹ý³Ì±È¶ÔaccessºÍsql2005¶ÔÓ¦±íÊý¾Ý£¬²¢Í¬²½²Ù×÷¡£
2¡¢´¥·¢Æ÷£¬µ±BÖ´ÐеÄʱºòÔËÐÐÉÏÊö´æ´¢¹ý³ ......

C# ·ÃÎÊAccessÊý¾Ý¿âµÄÎÊÌâ..

ÔÚÏòÒ»¸ö±í(Account)²åÈëÊý¾Ýʱ,Ìáʾ²åÈë³É¹¦,µ«´ò¿ªÊý¾Ý¿âʱÀïÃæÈ´Ã»ÓвåÈëµÄ¼Ç¼...´úÂëÈçÏÂ:
  readonly string constr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Database.mdb;Jet OLEDB:Database Password=layerworkshop";
  /// <summary>
  /// ´´½ ......

ÓÃselectÓï¾ä²éѯAccess±í¸ñµÄÆæ¹ÖÎÊÌâ

ÓÃÒÔÏÂselectÓï¾ä²éѯAccess±í¸ñʱ³öÏÖÎÊÌâ
sqlstring="SELECT ÐòºÅ,ÈÕÆÚ,Óû§Ãû,"+sqlfields+" from "+TableName; //Õâ¾ä³öÎÊÌâ
//sqlstring="SELECT * from "+TableName; //»»³ÉÕâ¾äûÎÊÌâ
DataModule1->ADOQuery1->SQL->Clear();
DataModule1- ......

Á¬½ÓACCESSÊý¾Ý¿âÊÇ·¢Éú´íÎó£¬ÇëÖ¸½Ì¡£

private void but_login_Click(object sender, EventArgs e)
  {
  string constring = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\Documents and Settings\\Administrator\\×ÀÃæ\\xx.mdb;Persist Security Info=False ";
  OdbcCommand comm = new Od ......

sqlserverÊý¾Ý¼Ó×ÜÅÅÐòµÄÓï¾äÔõôд£¿

sqlserverÊý¾Ý¼Ó×ÜÅÅÐòµÄÓï¾äÔõôд£¿
ÈçÏÂÊý¾Ý±ítable
id
a
a
a
b
b
c
ÎÒÒªµÃµ½µÄΪ£º
a 3
b 2
c 1
ÕâÑù¼Ó×ÜidÃû³ÆÒ»ÑùµÄ²¢½øÐÐÅÅÐòÓ¦¸ÃÔõôд£¿
SQL code:
select id,count(1) from tb group by id

SQL code:
SELECT *,(SELECT COUNT(1) from TB WHERE ID=T.ID)AS NUM
from TB T ORDER BY ......
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