¡¾×ª¡¿²ÉÓÃp6spyÍêÕûÏÔʾhibernateµÄSQLÓï¾ä
×÷ÕߣºÇñÑó
QQ£º1964477
ËäÈ»ÔÚhibernateÖÐÓÐshow_sqlÑ¡Ïµ«ÊÇÏÔʾ³öÀ´µÄÓï¾ä´ó¶àÀàËÆ
select * from xxx where value=?
µ«ÊÇÓÐʱºòÎÒÃÇÐèÒªµÃµ½ÍêÕûµÄSQLÓï¾ä£¬Ôõô°ìÄØ£¿Ê¹ÓÃP6SPY¾Í¿ÉÒÔÍê³ÉÕâ¸öÈÎÎñ
p6spyÊÇÒ»¸ö¿ªÔ´Èí¼þ£¬Ëü¿ÉÒÔ¸ú×ÙÈκÎʹÓÃjdbcµÄÓ¦ÓòúÉúµÄÊý¾Ý¿â²Ù×÷¡£ÌرðÊʺÏÓÚ¼à¿Øejb·þÎñÆ÷²úÉúµÄ sql statements¡£
¹Ù·½ÍøÖ·£ºhttp://www.p6spy.com/
Ŀǰp6spy ÊÊÓõÄÓ¦Ó÷þÎñÆ÷°üÀ¨jboss, atg, orion, jonas, iplanet, weblogic, websphere, resin and tomcat.
ÏÂÃæÎÒ½éÉÜÒ»ÏÂp6spyÔÚtomcatÓ¦ÓóÌÐòÉϰ²×°µÄ²½Ö裺
£¨1£©http://www.p6spy.com/download.html£¬ÏÂÔØzip°ü
£¨2£©½âѹ³öp6spy.jar spy.propertiesÁ½¸öÎļþ
£¨3£©½«p6spy.jar ·ÅÈëÓ¦ÓóÌÐòµÄWEB-INF/libĿ¼£¬½«spy.properties·ÅÈëWEB-INF/classesĿ¼
£¨4£©ÐÞ¸Äspy.properties
realdriver =com.mysql.jdbc.Driver ½«ÕâÐÐÇ°ÃæµÄ#È¥µô
logfile = c:/spy.log ÐÞ¸ÄÒ»¸öÄãÐèÒªµÄÈÕÖ¾ÎļþÃû
£¨5£©ÐÞ¸Ähibernate.xml£¬ÐÞ¸Äconnection.driver_classµÄֵΪcom.p6spy.engine.spy.P6SpyDriver
£¨6£©ÖØÆôtomcat
£¨7£©ÕâÑùÔÚc:/ϵÄspy.log¼Ç¼ÁËÊý¾Ý¿âµÄ·ÃÎÊÇé¿ö¡£
ÔÎĵØÖ·£ºhttp://www.blogjava.net/qclass/archive/2006/08/21/64692.html
Ïà¹ØÎĵµ£º
ÏÐÀ´Ð´ÏÂwith cubeµÄÓ÷¨
cubeÔËËã·ûÔÚ SELECT Óï¾äµÄ GROUP BY ×Ó¾äÖÐÖ¸¶¨¡£¸ÃÓï¾äµÄÑ¡ÔñÁбíÓ¦°üº¬Î¬¶ÈÁк;ۺϺ¯Êý±í´ïʽ¡£GROUP BY Ó¦Ö¸¶¨Î¬¶ÈÁк͹ؼü×Ö WITH CUBE¡£½á¹û¼¯½«°üº¬Î¬¶ÈÁÐÖи÷ÖµµÄËùÓпÉÄÜ×éºÏ£¬ÒÔ¼°ÓëÕâЩά¶ÈÖµ×éºÏÏàÆ¥ÅäµÄ»ù´¡ÐÐÖеľۺÏÖµ¡£
ÏÈ¿´ÏÂ±í£º
ÎÒÃÇÒÔid¾ÛºÏ²éѯ³öƽ¾ù·Ö
ÕâÒ»ÌõSQLÓï¾äÓ ......
--1. ´´½¨±í£¬Ìí¼Ó²âÊÔÊý¾Ý
CREATE TABLE tb(id int, [value] varchar(10))
INSERT tb SELECT 1, 'aa'
UNION ALL SELECT 1, 'bb'
UNION ALL SELECT 2, 'aaa'
UNION ALL SELECT 2, 'bbb'
UNION ALL SELECT 2, 'ccc'
--SELECT * from tb
/**//*
id value
----------- ----------
1 aa
1 ......
1¡¢Ê¹ÓÃË÷ÒýÀ´¸ü¿ìµØ±éÀú±í¡£
ȱʡÇé¿öϽ¨Á¢µÄË÷ÒýÊÇ·ÇȺ¼¯Ë÷Òý£¬µ«ÓÐʱËü²¢²»ÊÇ×î¼ÑµÄ¡£ÔÚ·ÇȺ¼¯Ë÷ÒýÏ£¬Êý¾ÝÔÚÎïÀíÉÏËæ»ú´æ·ÅÔÚÊý¾ÝÒ³ÉÏ¡£ºÏÀíµÄË÷ÒýÉè¼ÆÒª½¨Á¢ÔÚ¶Ô¸÷ÖÖ²éѯµÄ·ÖÎöºÍÔ¤²âÉÏ¡£
Ò»°ãÀ´Ëµ£º
a.ÓдóÁ¿Öظ´Öµ¡¢ÇÒ¾³£Óз¶Î§²éѯ£¨ > ,< £¬> =,< =£©ºÍorder by¡¢group by·¢ÉúµÄÁУ¬¿É¿¼
Âǽ ......
ÈýÖÖSQL·ÖÒ³·¨Ð§ÂÊ·ÖÎö
±íÖÐÖ÷¼ü±ØÐëΪ±êʶÁУ¬[ID] int IDENTITY (1,1)
1.·ÖÒ³·½°¸Ò»£º(ÀûÓÃNot InºÍSELECT TOP·ÖÒ³)
¡¡Óï¾äÐÎʽ£ºÀûÓÃNot InºÍSELECT TOP·ÖÒ³) ЧÂÊÖУ¬ÐèҪƴ½ÓSQLÓï¾ä
SELECT TOP 10 * from TestTable WHERE (Id NOT IN (SELECT TOP 20 id&n ......
Ò»¡¢SQL ServerÖÐÊý¾ÝÐеĴ洢·½Ê½
ÔÚSQL ServerÖдæ·ÅÊý¾ÝµÄÎļþ»áÒÔ8KBµÄ´óС·ÖÒ³¡£Ã¿Ò»Ò³¿ÉÒÔÊÇÊý¾Ý¡¢Ë÷ÒýÒÔ¼°ÆäËûSQL ServerÊý¾Ý¿âÐèҪΪÆäά»¤Êý¾ÝÎļþµÄÊý¾ÝÀàÐÍ¡£´ó¶àÊýÒ³ÊÇÊý¾ÝÒ³»òË÷ÒýÒ³¡£Ò³ÊÇSQL Server¶Á¡¢Ð´Êý¾ÝÎļþµÄµ¥Ôª¡£Ã¿Ò»Ò³Ö»°üÀ¨Ò»¸ö¶ÔÏóµÄÊý¾Ý»òË÷ÒýÐÅÏ¢£¬ËùÒÔÔÚÿһ¸öÊý¾Ý ......