Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Ö´ÐÐSQLÈ¡PostgreSQLÊý¾Ý¿â»ò±í´óС

ÔÚPostgreSQL8.1.3ÉÏ¿ÉÒÔwork
1. È¡Êý¾Ý¿â´óС
SELECT pg_size_pretty(pg_database_size('somedatabase')) As fulldbsize
2. È¡±í´óС
SELECT pg_size_pretty(pg_total_relation_size('someschema.sometable')) As fulltblsize, pg_size_pretty(pg_relation_size('someschema.sometable')) As justthetblsize
Ô­Ìù£º
http://www.postgresonline.com/journal/index.php?/archives/110-Determining-size-of-database,-schema,-tables,-and-geometry.html


Ïà¹ØÎĵµ£º

Oracle SQLÓï¾ä

ORDER BY ÅÅÐò
 
ASC ÉýÐò(ĬÈÏ)
 DESC ½µÐò
 
select * from s_emp order by dept_id , salary desc
²¿ÃźÅÉýÐò£¬¹¤×ʽµÐò
¹Ø¼ü×ÖdistinctÒ²»á´¥·¢ÅÅÐò²Ù×÷¡£
 
select * from employee order by 1; //°´µÚÒ»×Ö¶ÎÅÅÐò
NULL±»ÈÏΪÎÞÇî´ó¡£order by ¿ÉÒÔ¸ú±ðÃû¡£
 
select table_name ......

pl/sqlÀûÓÃrownumÈ¡µÃÅÅÐòºóµÄ²¿·ÖÐÐÐòÁÐ

ÎÒÃÇʹÓÃoracleµÄÈ˶¼ÖªµÀ¿ÉÒÔͨ¹ýrownumαÁеõ½²éѯ½á¹ûÐòÁÐÇ°ÃæµÄÖ¸¶¨µÄÐУ¬ÎªÁËÏÂÃæ¸üºÃµÄ½øÐÐ˵Ã÷ÎÊÌ⣬ÎÒÃÇÏÈÀ´´´½¨Ò»¸öÊý¾Ý±ítable1£º
create table table1
(AAA integer primary key,
BBB varchar(30));
È»ºóÔÚtable1ÖвåÈë9ÌõÊý¾Ý£º
insert into table1 values (8, 'good');
insert into table1 values (7 ......

ÓÃASPʵÏÖSQL SERVERÊý¾Ý¿âµÄÔ¶³Ì¸üÐÂ

ÓÃASPʵÏÖSQL SERVERÊý¾Ý¿âµÄÔ¶³Ì¸üÐÂ
½­ËÕʡͨÖÝÖ°Òµ¸ß¼¶ÖÐѧ  Áõ¼Æºâ
΢ÈíµÄSQL Server ÊÇÒ»¸ö´óÐ͵ĹØϵÊý¾Ý¿âϵͳ£¬ËüΪÔÚ¸´ÔÓ»·¾³ÏÂÓÐЧµØʵÏÖÖØÒªÉÌÒµÓ¦ÓÃÌṩÁËÒ»¸öÇ¿ÓÐÁ¦µÄ¿Í»§/·þÎñÆ÷ƽ̨¡£Ëü½áºÏMicrosoft Windows NT²Ù×÷ϵͳµÄÄÜÁ¦£¬ÌṩÁËÒ»¸ö°²È«¡¢¿ÉÀ©Õ¹¡¢Ò×¹ÜÀí¡¢¸ß¶ËÐÔÄܵĿͻ§/·þÎñÆ÷Êý¾Ý¿âƽ̨¡£Õ ......

SQL Server 2000µÄJDBCÁ¬½ÓÎÊÌâ½â¾ö·½·¨

 ¾­¹ýºÃ¼¸ÌìµÄ·ÜÕ½£¬JDBCÖÕÓڳɹ¦Á¬½ÓÁËSQL Server 2000£¬ÆÚ¼ä×ßÁ˲»ÉÙÍä·£¬ÔÚÕâÀï·ÖÏíÎÒµÄÒ»µã¾­Ñé
Ò»¡¢ÎҵĻ·¾³
   Windows XP+JDK6u15+Microsoft SQL Server 2000£¨SP4£©+JCreator
   ÎÒÏÈÔÚÍøÉÏÏÂÔØÊý¾Ý¿âÇý¶¯³ÌÐò£¬Ä¿Â¼ÏÂÓÐÈý¸ö°ümsbase.jar mssqlserver.jar msutil.jar
   1 ......

SQL Server CE

 SQL Server CE 2.0µÄÈ«ÃûÊÇSQL Server 2000 Windows CE Edition version 2.0¡£
Àý×Ó1£º¹«Ë¾ÅÉÈËÈ¥²Ö¿âÑé»õ¡¢µã»õ£¬¿ÉÒÔ°ÑÇ嵥ͬ²½µ½Pocket PCÉÏ£¬È»ºóÔÚ²Ö¿âÀïÃæÖ±½ÓÔÚPPCÉÏÃæupdate£¬»Øµ½¹«Ë¾Ò»Í¬²½¾Í¿ÉÒÔÁË¡£·ñÔò°´ÕÕÔ­ÏÈ×ö·¨£¬ÐèÒªÏÈ´òÓ¡Ò»ÕÅÇåµ¥£¬»ØÀ´ÒÔºóÔÙ¼ÈëÒ»±é¡£
Àý×Ó2£ºÁªÏëÅÉÈËÉÏÃÅÀ´ÐÞµçÄÔ£¬ÒÔÇ°×ÜÊÇ´ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ