SQLServer Öд¦ÀíÁ½¸öÈÕÆÚÏà¼õµÃµ½ÌìÊý
DATEDIFF(datepart, startdate, enddate)
Datepart Abbreviations
year yy, yyyy
quarter qq, q
month mm, m
dayofyear dy, y
day dd, d
week wk, ww
hour hh
minute mi, n
second ss, s
millisecond ms
Ïà¹ØÎĵµ£º
ÔÚÓëÊý¾Ý¿â´ò½»µÀµÄ¹¤×÷ÖÐʱ³£»áÅöµ½Ò»Ð©Êý¾Ý¿âµÄ´íÎó£¬Õâ¾ÍÉæ¼°µ½ÁËÐÞ¸´µÄ¹ý³Ì£¬ÒÔÏÂ֪ʶµã¶¼ÊÇ´ÓÍøÉÏÊÕ¼¯¶øÀ´:
1¡¢dbcc checkdb
Õâ¸öÃüÁî¿ÖÅÂÊÇÎÒÃÇ×î³£ÓõÄÁË£¬´ø¼ì²éºÍÐÞ¸´¹¦ÄÜ
Óï·¨¸ñʽ£º
DBCC CHECKDB
[
[ ( database_name | database_id | 0
[ , NOINDEX
| , { REPAIR_ALLOW_DATA_LOS ......
¿Î³ÌÉè¼ÆµÄµÚÒ»²½£º
Óû§µÇ½ģ¿é:¾ÍÕâ¸öСģ¿é°ÑÎÒÕûËÀÁË£¬³öÏÖµÄÎÊÌâÒ»¸ö½Ó×ÅÒ»¸ö£¬×îÖ÷ÒªµÄ¾ÍÊÇÊý¾Ý¿âÁ¬½Ó.
question1.
java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
Òì³£ÔÒò£ºÃ»Óе¼Èëµ¼Çý¶¯°üsqljdbc.jar.
question2.
......
´ó²¿·ÖÈ˶¼ÖªµÀÓÃoledbÀ´¶ÁÈ¡Êý¾Ýµ½dataset£¬µ«ÊǶÁȡ֮ºóÔõô´¦Àídataset¾ÍÇ§Ææ°Ù¹ÖÁË¡£ºÜ¶àÈËͨ¹ýÑ»·À´Æ´½Ósql£¬ÕâÑù×ö²»µ«ÈÝÒ׳ö´í¶øÇÒЧÂʵÍÏ£¬System.Data.SqlClient.SqlBulkCopy ¶ÔÓÚÐÂÊÖÀ´Ëµ»¹ÊDZȽÏİÉúµÄ£¬Õâ¸ö¾ÍÊÇ´«ËµÖÐЧÂʼ«¸ßµÄbcp£¬6Íò¶àÊý¾Ý´Óexcelµ¼Èëµ½sqlÖ»ÐèÒª4.5Ãë¡£
using System;
......
1. ΪºÎʹÓÃÓα꣺
ʹÓÃÓαê(cursor)µÄÒ»¸öÖ÷ÒªµÄÔÒò¾ÍÊǰѼ¯ºÏ²Ù×÷ת»»³Éµ¥¸ö¼Ç¼´¦Àí·½Ê½¡£ÓÃSQLÓïÑÔ´ÓÊý¾Ý¿âÖмìË÷Êý¾Ýºó£¬½á¹û·ÅÔÚÄÚ´æµÄÒ»¿éÇøÓòÖУ¬ÇÒ½á¹û
ÍùÍùÊÇÒ»¸öº¬Óжà¸ö¼Ç¼µÄ¼¯ºÏ¡£Óαê»úÖÆÔÊÐíÓû§ÔÚSQL serverÄÚÖðÐеطÃÎÊÕâЩ¼Ç¼£¬°´ÕÕÓû§×Ô¼ºµÄÒâÔ¸À´ÏÔʾºÍ´¦ÀíÕ ......
Óα꣨Cursor£©ÊÇ´¦ÀíÊý¾ÝµÄÒ»ÖÖ·½·¨£¬ÎªÁ˲鿴»òÕß´¦Àí½á¹û¼¯ÖеÄÊý¾Ý£¬ÓαêÌṩÁËÔÚ½á¹û¼¯ÖÐÒ»´ÎÒÔÐлòÕß¶àÐÐǰ½ø»òÏòºóä¯ÀÀÊý¾ÝµÄÄÜÁ¦¡£ÎÒÃÇ¿ÉÒÔ°ÑÓα굱×÷Ò»¸öÖ¸Õ룬Ëü¿ÉÒÔÖ¸¶¨½á¹ûÖеÄÈκÎλÖã¬È»ºóÔÊÐíÓû§¶ÔÖ¸¶¨Î»ÖõÄÊý¾Ý½øÐд¦Àí¡£
1.ÓαêµÄ×é³É
......