PL/SQL³ÌÐòÉè¼Æ£¨ÓαêµÄʹÓÃ)
ΪÁË´¦Àí SQL Óï¾ä£¬ORACLE ±ØÐë·ÖÅäһƬ½ÐÉÏÏÂÎÄ( context area )µÄÇøÓòÀ´´¦ÀíËù±ØÐèµÄÐÅÏ¢£¬ÆäÖаüÀ¨Òª´¦ÀíµÄÐеÄÊýÄ¿£¬Ò»¸öÖ¸ÏòÓï¾ä±»·ÖÎöÒÔºóµÄ±íʾÐÎʽµÄÖ¸ÕëÒÔ¼°²éѯµÄ»î¶¯¼¯(active set)¡£
ÓαêÊÇÒ»¸öÖ¸ÏòÉÏÏÂÎĵľä±ú( handle)»òÖ¸Õ롣ͨ¹ýÓα꣬PL/SQL¿ÉÒÔ¿ØÖÆÉÏÏÂÎÄÇøºÍ´¦ÀíÓï¾äʱÉÏÏÂÎÄÇø»á·¢ÉúЩʲôÊÂÇé¡£
¶ÔÓÚ²»Í¬µÄSQLÓï¾ä£¬ÓαêµÄʹÓÃÇé¿ö²»Í¬£º
SQLÓï¾ä
Óαê
·Ç²éѯÓï¾ä
ÒþʽµÄ
½á¹ûÊǵ¥ÐеIJéѯÓï¾ä
ÒþʽµÄ»òÏÔʾµÄ
½á¹ûÊǶàÐеIJéѯÓï¾ä
ÏÔʾµÄ
§4.1.1 ´¦ÀíÏÔʽÓαê
1. ÏÔʽÓα괦Àí
ÏÔʽÓα괦ÀíÐèËĸö PL/SQL²½Öè:
l ¶¨ÒåÓα꣺¾ÍÊǶ¨ÒåÒ»¸öÓαêÃû£¬ÒÔ¼°ÓëÆäÏà¶ÔÓ¦µÄSELECT Óï¾ä¡£
¸ñʽ£º
CURSOR cursor_name[(parameter[, parameter]…)] IS select_statement;
Óαê²ÎÊýÖ»ÄÜΪÊäÈë²ÎÊý£¬Æä¸ñʽΪ£º
parameter_name [IN] datatype [{:= | DEFAULT} expression]
ÔÚÖ¸¶¨Êý¾ÝÀàÐÍʱ£¬²»ÄÜʹÓó¤¶ÈÔ¼Êø¡£ÈçNUMBER(4)¡¢CHAR(10) µÈ¶¼ÊÇ´íÎóµÄ¡£
l ´ò¿ªÓα꣺¾ÍÊÇÖ´ÐÐÓαêËù¶ÔÓ¦µÄSELECT Óï¾ä£¬½«Æä²éѯ½á¹û·ÅÈ빤×÷Çø£¬²¢ÇÒÖ¸ÕëÖ¸Ïò¹¤×÷ÇøµÄÊײ¿£¬±êʶÓαê½á¹û¼¯ºÏ¡£Èç¹ûÓαê²éѯÓï¾äÖдøÓÐFOR UPDATEÑ¡ÏOPEN Óï¾ä»¹½«Ëø¶¨Êý¾Ý¿â±íÖÐÓαê½á¹û¼¯ºÏ¶ÔÓ¦µÄÊý¾ÝÐС£
¸ñʽ£º
OPEN cursor_name[([parameter =>] value[, [parameter =>] value]…)];
ÔÚÏòÓα괫µÝ²ÎÊýʱ£¬¿ÉÒÔʹÓÃÓ뺯Êý²ÎÊýÏàͬµÄ´«Öµ·½·¨£¬¼´Î»Öñíʾ·¨ºÍÃû³Æ±íʾ ·¨¡£PL/SQL ³ÌÐò²»ÄÜÓÃOPEN Óï¾äÖظ´´ò¿ªÒ»¸öÓαꡣ
l ÌáÈ¡ÓαêÊý¾Ý£º¾ÍÊǼìË÷½á¹û¼¯ºÏÖеÄÊý¾ÝÐУ¬·ÅÈëÖ¸¶¨µÄÊä³ö±äÁ¿ÖС£
¸ñʽ£º
FETCH cursor_name INTO {variable_list | record_variable };
l ¶Ô¸Ã¼Ç¼½øÐд¦Àí£»
l ¼ÌÐø´¦Àí£¬Ö±µ½»î¶¯¼¯ºÏÖÐûÓмǼ£»
l ¹Ø±ÕÓα꣺µ±ÌáÈ¡ºÍ´¦ÀíÍêÓαê½á¹û¼¯ºÏÊý¾Ýºó£¬Ó¦¼°Ê±¹Ø±ÕÓα꣬ÒÔÊͷŸÃÓαêËùÕ¼ÓõÄϵͳ×ÊÔ´£¬²¢Ê¹¸ÃÓαêµÄ¹¤×÷Çø±ä³ÉÎÞЧ£¬²»ÄÜÔÙʹÓÃFETCH Óï¾äÈ¡ÆäÖÐÊý¾Ý¡£¹Ø±ÕºóµÄÓαê¿ÉÒÔʹÓÃOPEN Óï¾äÖØдò¿ª¡£
¸ñʽ£º
CLOSE cursor_name;
×¢£º¶¨ÒåµÄÓα겻ÄÜÓÐINTO ×Ӿ䡣
Àý1. Óαê²ÎÊýµÄ´
Ïà¹ØÎĵµ£º
import java.sql.*;
public class JdbcUtil
{
public static void close(Statement st, Connection con)
{
try
{
&nb ......
ºÜ¶àÈËÌرðϲ»¶ÓÃÊÓͼ,µ«ÓеÄÈË´ÓÀ´²»ÓÃÊÓͼ.ÕⶼÊÇÁ½ÖÖ²»Á¼µÄÏ°¹ß. ÒªÃ÷È·ÊÓͼ¿ÉÒÔÍê³ÉµÄ¹¤×÷ÒÔ¼°Ê¹Óó¡ºÏ.
1.×èֹѡÔñ±£ÃÜÁÐ
2.½µµÍÓû§¶ÁÈ¡Êý¾Ý¿âÄÚÊý¾ÝµÄ¸´ÔÓÐÔ
3.ÔÚÊý¾Ý¿âÖÐÌí¼ÓË÷ÒýÒÔ¼ÓËÙ ......
Èç¹ûÄãÕýÔÚ¸ºÔðÒ»¸ö»ùÓÚSQL ServerµÄÏîÄ¿£¬»òÕßÄã¸Õ¸Õ½Ó´¥SQL Server£¬Ä㶼ÓпÉÄÜÒªÃæÁÙһЩÊý¾Ý¿âÐÔÄܵÄÎÊÌ⣬ÕâƪÎÄÕ»áΪÄãÌṩһЩÓÐÓõÄÖ¸µ¼£¨ÆäÖдó¶àÊýÒ²¿ÉÒÔÓÃÓÚÆäËüµÄDBMS£©¡£
ÔÚÕâÀÎÒ²»´òËã½éÉÜʹÓÃSQL ServerµÄÇÏÃÅ£¬Ò²²»ÄÜÌṩһ¸ö°üÖΰٲ¡µÄ·½°¸£¬ÎÒËù×öµÄÊÇ×ܽáһЩ¾Ñé----¹ØÓÚÈçºÎÐγÉÒ»¸öºÃµÄÉè¼Æ¡£Õ ......
ÏÂÁÐÓï¾ä²¿·ÖÊÇMssqlÓï¾ä£¬²»¿ÉÒÔÔÚaccessÖÐʹÓá£
SQL·ÖÀࣺ
DDL—Êý¾Ý¶¨ÒåÓïÑÔ(CREATE£¬ALTER£¬DROP£¬DECLARE)
DML—Êý¾Ý²Ù×ÝÓïÑÔ(SELECT£¬DELETE£¬UPDATE£¬INSERT)
DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)
Ê×ÏÈ,¼òÒª½éÉÜ»ù´¡Óï¾ä£º
1¡¢ËµÃ÷£º´´½¨Êý¾Ý¿â
CREATE DATABASE data ......
Õª×Ô£ºhttp://www.cnblogs.com/dicky/archive/2007/01/12/618453.html
¸ñʽ:
CONVERT(data_type,expression[,style])
˵Ã÷:
´ËÑùʽһ°ãÔÚʱ¼äÀàÐÍ(datetime,smalldatetime)Óë×Ö·û´®ÀàÐÍ(nchar,nvarchar,char,varchar)
Ï໥ת»»µÄʱºò²ÅÓõ½.
Àý×Ó:
SELECT CONVERT(varchar(30),getdate(),101) now
½á¹ûΪ ......