JavaÈçºÎ·Àsql×¢Èë
²ÉÓÃÔ¤±àÒëÓï¾ä¼¯£¬ËüÄÚÖÃÁË´¦ÀíSQL×¢ÈëµÄÄÜÁ¦£¬Ö»ÒªÊ¹ÓÃËüµÄsetString·½·¨´«Öµ¼´¿É£º
String sql= "select * from users where username=? and password=?;
PreparedStatement preState = conn.prepareStatement(sql);
preState.setString(1, userName);
preState.setString(2, password);
ResultSet rs = preState.executeQuery();
Ïà¹ØÎĵµ£º
½üÆÚ£¬ÔÚ¸ø¿Í»§×öÒ»¸öDemoÒ³ÃæÊ±£¬ÐèÒªÓÃJAVA¶ÁÈ¡OracleÖеÄblobͼƬ×ֶβ¢ÏÔʾ£¬Ôڴ˹ý³ÌÖУ¬Óöµ½Ò»Ð©ÎÊÌ⣬ÀýÈ磺Á¬½ÓOracleÊý¾Ý¿â¶ÁÈ¡blob×Ö¶ÎÊý¾Ý£¬¶ÔͼƬbyteÊý¾Ý½øÐÐËõ·ÅµÈ£»Ìش˼Ǽ£¬¸ø×Ô¼º±¸Íü£¬¸ø´ó¼Ò²Î¿¼¡£
Õû¸öÁ÷³Ì·ÖΪËIJ½£¬Á¬½ÓoracleÊý¾Ý¿â -> ¶ÁÈ¡blobͼƬ×Ö¶Î -> ¶ÔͼƬ½øÐÐËõ·Å ->°ÑͼƬչʾÔÚ ......
1.
SQL> desc gjh_a05 ;
Name Type Nullable Default Comments
----- ------------- -------- ------- --------
A0500 VARCHAR2(2) Y &nbs ......
order by µÄÊýÖµÐÍÁé»îʹÓÃ
select * from table_a where id=p_id order by decode(º¯Êý,'asc',1,'desc',-1)*jsny;
¿ØÖÆÊÔͼµÄ·ÃÎÊʱ¼ä£º
6.create view ...
as
select ... from where exists(select x from dual where sysdate>=8:00am and sysdate<=5:00pm)
ÃîÓÃdecodeʵÏÖÅÅÐò
select * from tabnam ......
http://kang275284.javaeye.com/blog/154331
Ò»¡¢ ÏȽéÉÜÒ»ÏÂoracle
µÄSGA£ºÊý¾Ý¿âµÄϵͳȫ¾ÖÇø£¬SGAÖ÷ÒªÓÉÈý²¿·Ö¹¹
³É£º¹²Ïí³Ø¡¢Êý¾Ý»º³åÇø¡¢ÈÕÖ¾»º³åÇø¡£
1¡¢ ¹²Ïí³ØÓÖÓÉÁ½²¿·Ö¹¹³É£º¹²ÏíSQL
Çø
ºÍÊý¾Ý×ֵ仺³åÇø¡£¹²ÏíSQL
Çø×¨ÃÅ´æ·ÅÓû§SQL
Ãü
Áoracle
ʹÓÃ×î½ü×îÉÙʹÓõÈÓÅÏȼ¶Ëã·¨À´¸üи²¸Ç£ ......
¸ù¾ÝÉúÈÕµÄxxÔÂxxÈÕ²éÕÒÔÚ$checkDate¼ÆË㣬$beforeÈÕºóÉúÈյĿͻ§£º
$checkDateΪYYYY-MM-DD
WHERE substring(ADDDATE( '$checkDate', $before ),6,10)=substring(DATE_FORMAT(birthday,'%Y-%m-%d'),6,10)
$dates ÌìÄÚÉúÈյĿͻ§Î´¿¼Âǵ½Æ½Äê¡¢ÈòÄ꣺£º
$sql.=" (dayofyear( birthday )-dayofyear( ......