C# ÓÃSQLн¨Êý¾Ý¿â
1. ³ÌÐòÈçÏ£º
string str = "Create Database " + "DBname";
string con = "Data Source=10.0.0.249\\sql2005;Initial Catalog=master;Persist Security Info=True;User ID=sa;Password=sa";
SqlConnection myConn = new SqlConnection(con);
SqlCommand myCommand = new SqlCommand(str, myConn);
try
{
myConn.Open();
myCommand.ExecuteNonQuery();
Console.WriteLine("SQL Óï¾äÖ´ÐÐÍê³É¡£", "MyProgram");
}
catch (System.Exception ex)
{
Console.WriteLine(ex.ToString(), "MyProgram");
}
finally
{
if (myConn.State == ConnectionState.Open)
{
myConn.Close();
Ïà¹ØÎĵµ£º
SQL SERVER 2008 Òì²½²¶»ñ±íÊý¾ÝÐÞ¸Ä
дµÄ²»¶ÔµÄµØ·½Çë¸÷λָÕý£¬Ð´µÄÒ²±È½ÏÂÒ¡£½²¾¿Õâ¿´°É¡£^ ^
/*
SQL SERVER 2008 Òì²½²¶»ñ±íÊý¾ÝÐÞ¸Ä
SQL server 2008ΪÒì²½¸ú×ÙËùÓз¢ÉúÔÚÓû§±íÉϵÄÊý¾ÝÐÞ¸ÄÌṩÁËÄÚ½¨µÄ·½·¨,
¶ø²»ÐèÒª±àд×Ô¶¨ÒåµÄ´¥·¢Æ÷»òÕß²éѯ,±ä¸üÊý¾Ý²¶»ñÓµÓÐ×îСÐÔÄÜ¿ªÏú,¿ÉÒÔ
Ó ......
SQLÓï¾äµÄÓÅ»¯¾ÍÊǽ«ÐÔÄܽϵ͵ÄSQLÓï¾äת»»´ï³ÉͬÑùÄ¿µÄÐÔÄÜÓÅÒìµÄSQLÓï¾ä
ÏÂÃæÎÒÃÇÒ»ÆðÀ´¿´¿´Ò»Ð©¿ÉÒÔÓÅ»¯SQLµÄ·½·¨£¬Ï£Íû´ó¼Ò¶àÌá³öÒâ¼ûÎÒÃǹ²Í¬Ñ§Ï°»òÕßÊÇ´ó¼ÒÓÐʲôºÃµÄÓÅ»¯·½·¨¿ÉÒÔÌá³öÀ´¹²Ïíһϡ£
µÚÒ»ÖÖÓÅ»¯£¨Ê¹ÓÃÖ¸¶¨ÁдúÌæ”*”£©
ʹÓÓ*”¿ÉÒÔ½µµÍ±àдSQLÓï ......
1.ɾ³ý±í
select 'drop table ' || table_name || ' purge;'
from user_tables
where length(table_name) <= 4;
ɾ³ý´øÔ¼ÊøµÄ±í
Drop table ±íÃû cascade constraints;
2.²éѯview&ͬÒå´Ê
--˵Ã÷£º¿ÉÒÔ¸ù¾ÝÊÓͼµÄtext_length ......
ÎÒÃÇÖªµÀ£¬ÔÚSQL SERVERÖÐÓÐBit, Float, Int , CharµÈµÈһϵÁеÄÊý¾ÝÀàÐÍ£¬¶øÔÚDOT NETÖУ¬ÓÐBoolean,Double,Int 32,StringµÈÊý¾ÝÀàÐÍÓëÖ®¶ÔÓ¦¡£ Ò²¾ÍÊÇ˵£¬Êý¾Ý¿âÖеÄÊý¾ÝÀàÐÍÓëDOT NETµÄÊý¾ÝÀàÐÍÖ®¼ä£¬ÓÐÒ»¸öÓ³Éä¹ØÏµ¡£Ï±íÊÇËûÃǵÄÓ³Éä¹ØÏµ£º
dot netÖеÄÊý¾ÝÀàÐÍ &n ......
1.×Ö·û´®º¯Êý
³¤¶ÈÓë·ÖÎöÓÃ
datalength(Char_expr) ·µ»Ø×Ö·û´®°üº¬×Ö·ûÊý,µ«²»°üº¬ºóÃæµÄ¿Õ¸ñ
substring(expression,start,length) ²»¶à˵ÁË,È¡×Ó´®
right(char_expr,int_expr) ·µ»Ø×Ö·û´®ÓÒ±ßint_expr¸ö×Ö·û
×Ö·û²Ù×÷Àà
upper(char_expr) תΪ´óÐ ......