C# sql ʵÏÖͼƬÅúÁ¿´¢´æ¶ÁÈ¡
winform주
//´æ´¢
private void MemoryImage()
{
string sql = "";
//string conn = "Provider=SQLNCLI;Data Source=192.168.0.9,1433;Database=WebDown;UID=sa;PWD=111122;";
Stream ms;
byte[] picbyte;
OpenFileDialog ofdSelectPic = new OpenFileDialog();
if (ofdSelectPic.ShowDialog() == DialogResult.OK)
{
if ((ms = ofdSelectPic.OpenFile()) != null)
{
picbyte = new byte[ms.Length];
ms.Position = 0;
ms.Read(picbyte, 0, Convert.ToInt32(ms.Length));
//Á¬½ÓÊý¾Ý¿â
SqlConnection conn = new SqlConnection();
conn
Ïà¹ØÎĵµ£º
½¨±í
create table users(
id number(4) primary key,
username varchar2(10),
password varchar2(10)
)
²éѯ±í²¢½âËø±í(¼´¿ÉÒÔµã»÷ÊäÈë¿òÏÂÃæµÄ"Ëø"ͼ±ê¹¤¾ß, ¼´"Edit data")
select * from users for update
ɾ³ý±íÖжàÓàµÄÁÐ
alter table mobilephone drop column mobiletype
×ªÔØ
------------------- ......
ORACLE 10GµÄ¼¯ºÏAPI
¼¯ºÏAPI·½·¨×îÔçÊÇÔÚORACLE 8IÖÐÒýÈëµÄ¡£¼¯ºÏAPIÌṩÁ˼ò»¯·ÃÎʼ¯ºÏµÄ·½·¨¡£ÔÚORACLE 10GÒÔǰ£¬ÕâЩ·½·¨È·Êµ¼ò»¯Á˶Լ¯ºÏµÄ·ÃÎÊ¡£µ«ÊÇ£¬²¢²»ÊÇ·ÇÒªÇóÕÆÎÕÕâЩ·½·¨²»¿É¡£´ÓORACLE 9IµÄINDEX-BY±íµ½ORACLE 10GµÄÁªºÏÊý×éµÄת»»£¬Ê¹ËüÃdzÉΪ±ØÐëÕÆÎյķ½·¨¡£
ÏÂÃæÊÇÎÒ´ÓÊéÉÏժ¼ÏµÄһР......
SQLÓï¾äÏÈǰдµÄʱºò£¬ºÜÈÝÒ×°ÑÒ»Ð©ÌØÊâµÄÓ÷¨Íü¼Ç£¬ÎÒÌØ´ËÕûÀíÁËÒ»ÏÂSQLÓï¾ä²Ù×÷£¬·½±ã×Ô¼ºÐ´SQLʱ·½±ãÒ»µã£¬ÏëÌùÉÏÀ´£¬Ò»Æð¿´¿´£¬Í¬Ê±Ï£Íû´ó¼ÒÄܹ²Í¬¶à¶àÌáÒâ¼û£¬Ò²¸øÎÒÁôһЩ¸üºÃµÄ¼Ñ¾ä£¬ÕûÀíÒ»·Ý¡¶¾«ÃîSQLËÙ²éÊֲᡷ£¬²»Áߴͽ̣¡
Ò»¡¢»ù´¡
1¡¢ËµÃ÷£º´´½¨Êý¾Ý¿â
CREATE DATABASE database-name
2¡¢ËµÃ÷£ºÉ¾³ýÊý¾ ......
ÈÃÎÒÃÇ´ÓÕâÑùÒ»¸öʾÀý¿ªÊ¼ËµÆð£¬ËüÔÚ SQL Server 2000 ºÍ 2005 Öж¼ÄÜÒýÆðËÀËø¡£ÔÚ±¾ÎÄÖУ¬ÎÒʹÓà SQL Server 2005 µÄ×îРCTP£¨ÉçÇø¼¼ÊõÔ¤ÀÀ£¬Community Technology Preview£©°æ±¾£¬SQL Server 2005 Beta 2£¨7 Ô·¢²¼£©Ò²Í¬ÑùÊÊÓá£Èç¹ûÄúûÓÐ Beta 2 »ò×îÐ嵀 CTP °æ±¾£¬ÇëÏÂÔØ SQL Serve ......
×ܽáÒ»ÏÂSQLÓï¾äÖÐÒýºÅ(')¡¢quotedstr()¡¢('')¡¢format()ÔÚSQLÓï¾äÖеÄÓ÷¨ÒÔ¼°SQLÓï¾äÖÐÈÕÆÚ¸ñʽµÄ±íʾ(#)¡¢('')
ÔÚDelphiÖнøÐÐ×Ö·û±äÁ¿Á¬½ÓÏà¼Óʱµ¥ÒýºÅÓÃ('''),ÓÖÒýºÅÓÃ('''')±íʾ
Ê×Ïȶ¨Òå±äÁ¿
var
AnInt:integer=123;//ΪÁË·½±ãÔڴ˶¼¸øËüÃǸ³³õÖµ¡£ËäÈ»¿ÉÄÜÔÚÒý¸³³õÖµÔÚijЩÇé¿öϲ»¶Ô
AnIntStr:string='456'; ......