SQL Server 2000½Ì²Ä¶ÁÊé±Ê¼Ç£¨2£©
½ñÌì¿´Á˵ÄÄÚÈÝÊÇÏÂÃæµÄ: 1.5 ·þÎñÆ÷¶ËÓë¿Í»§¶ËÍøÂç¿âµÄÉèÖà ʲôÊÇÍøÂç¿â,ÎÒµÄÀí½â¾ÍÊÇÍøÂçÁ¬½ÓµÄÐÒé¼°¸÷ÖÖÉèÖÃ. 1.5.1 ·þÎñÆ÷ÍøÂç¿âµÄÉèÖà 1.5.2 ÅäÖÿͻ§¶ËµÄÍøÂç¿â µÚ1´Î½øÐÐÁ˽âÁË¡£ 1.6 SQL Server ·þÎñÆ÷µÄ×¢²áÓëÁ¬½Ó Ã÷°×ÁËΪʲôҪע²áÓëÁ¬½Ó£¬Ö÷ÒªÊÇÓ¦ÓÃÓÚÔ¶³Ì·þÎñÆ÷µÄ¡£ 1.6.1 ×¢²á·þÎñÆ÷ǰӦÁ˽âµÄ֪ʶ 1.·þÎñÆ÷µÄµÇ¼ÕÊ»§ÓëÑéÖ¤ 2.ϵͳĬÈϵǼÕÊ»§ 1.6.2 ×¢²á·þÎñÆ÷ ÊìϤÁ˲½Öè 1.6.3 Ð޸ķþÎñÆ÷µÄ×¢²áÊôÐÔÓëɾ³ý·þÎñÆ÷ 1.6.4 ÉèÖÃSQL Server µÇ¼Éí·ÝÑé֤ģʽ 1.7 ÆóÒµ¹ÜÀíÆ÷¡¢²éѯ·ÖÎöÆ÷ºÍÁª»ú´ÔÊé ´óÌåÁ˽âÉÏÃæ3¸ö³ÌÐòµÄ×÷Óᣠ»¹ÓÐϰÌâºÍʵѵû×ö£¬Òª»¨Ê±¼ä×öÁË¡£
Ïà¹ØÎĵµ£º
Õû¸öSQLºÍAsp.net(vb.net)Ò»Æð´ò°üµÄÈ«¹ý³ÌдһÏ¡£
Ò».×¼±¸±ØÒªµÄÎļþ
1. SQL½Å±¾Îļþ£¬Éú³ÉÒÔºó°²×°¹ý³ÌÖÐÐèÒªµÄ±íºÍ´æ´¢¹ý³ÌµÈµÈ£»
Éú³ÉÖ®ºó£¬¾ÍÔÝʱ°ÑËüÃüÃûΪdb.sql(×¢Òâ´óСд)
2.LisenceFile.rtfµÄ°²×°Îļþ£¬ÒòΪÎÒµÄϵͳÊǸöÈ˵쬶øÇÒfreeµÄ£¬ËùÒÔ¾ÍûÓÐ×ö¡£Õâ¸öÒÔºóÒ²ÊÇÒªÓõ½µÄ¡£
¶þ.ÔÚ×Ô¼ºÏÖÓеÄÏîÄ¿Àïà ......
ÐÐÁÐת»»
create table test(id int,name varchar(20),quarter int,profile int)
insert into test values(1,'a',1,1000)
insert into test values(1,'a',2,2000)
insert into test values(1,'a',3,4000)
insert into test values(1,'a',4,5000)
insert into test values(2,'b',1,3000)
insert into test values(2, ......
¾ÛºÏº¯ÊýÈôÒª»ã×ÜÒ»¶¨·¶Î§µÄÊýÖµ£¬ÇëʹÓÃÒÔϺ¯Êý£º
SUM
·µ»Ø±í´ïʽÖÐËùÓÐÖµµÄ×ܺ͡£
Óï·¨
SUM(aggregate)
SUM Ö»ÄÜÓë°üº¬ÊýÖµµÄ×Ö¶ÎÒ»ÆðʹÓ᣽«ºöÂÔ¿ÕÖµ¡£
AVERAGE
·µ»Ø±í´ïʽÖÐËùÓзǿÕÖµµÄƽ¾ùÖµ£¨ËãÊõƽ¾ùÖµ£©¡£
Óï·¨
AVERAGE(aggregate)
AVERAGE Ö»ÄÜÓë°üº¬ÊýÖµµÄ×Ö¶ÎÒ»ÆðʹÓ᣽«ºöÂÔ¿ÕÖµ¡£
......
ÓйطÖÒ³ SQL µÄ×ÊÁϺܶ࣬ÓеÄʹÓô洢¹ý³Ì£¬ÓеÄʹÓÃÓαꡣ±¾È˲»Ï²»¶Ê¹ÓÃÓα꣬ÎÒ¾õµÃËüºÄ×Ê¡¢Ð§Âʵͣ»Ê¹Óô洢¹ý³ÌÊǸö²»´íµÄÑ¡Ôñ£¬ÒòΪ´æ´¢¹ý³ÌÊǾ¹ýÔ¤±àÒëµÄ£¬Ö´ÐÐЧÂʸߣ¬Ò²¸üÁé»î¡£ÏÈ¿´¿´µ¥Ìõ SQL Óï¾äµÄ·ÖÒ³ SQL °É¡£
·½·¨1£º
ÊÊÓÃÓÚ SQL Server 2000/2005
SELECT TOP Ò³´óС *
from tab ......