SQL Êý¾Ý¿â¼ä¸´ÖƱí
·½·¨Ò»£º
DB1 tb1
DB2 tb2
Ñ¡ÔñDB1 µ½±íµÄÁбíÄÇÀï
Ñ¡Ôñtb1±í ÓÒ¼ü ËùÓÐÈÎÎñ Êý¾Ýµ¼³ö
ÏÂÒ»²½ Ñ¡ÔñÄãÒªµ¼³öµÄÊý¾Ý¿âDB1 ÏÂÒ»²½ Ñ¡ÔñÄãÒªµ¼ÈëµÄÊý¾Ý¿âDB2
ÏÂÒ»²½ Ñ¡ÔñÄãÒªµ¼µÄ±í£¨Ç°Ã滹´£©tb1£¬ ºóÃæ¶ÔÓ¦µÄÊÇÐÂÊý¾Ý¿âµÄ±íÃûtb2£¨Ä¬ÈÏÊÇÏàͬ±íÃû£¬¿ÉÐ޸ģ© ÏÂÒ»²½ ÍêÁË
·½·¨¶þ
sqlÓï¾ä
¼ÙÉèÊý¾Ý±íÒѽ¨Á¢£¬Ä¿µÄ±íÓëÔ´±í½á¹¹Ïàͬ¡£
insert into DB2.dbo.tb2
select * from DB1.dbo.tb1
go
Èç¹ûÊǵ¼Èë¾ßÌåij¼¸ÁлòÓÐÌõ¼þµ¼È룬ÏàÓ¦Ð޸ļ´¿É¡£
²»Í¬Êý¾Ý¿âÖ®¼ä¸´ÖƱíµÄÊý¾ÝµÄ·½·¨£º
µ±±íÄ¿±ê±í´æÔÚʱ£º
insert into Ä¿µÄÊý¾Ý¿â..±í select * from Ô´Êý¾Ý¿â..±í
µ±Ä¿±ê±í²»´æÔÚʱ£º
select * into Ä¿µÄÊý¾Ý¿â..±í from Ô´Êý¾Ý¿â..±í
--Èç¹ûÔÚ²»Í¬µÄSQLÖ®¼ä:
insert into openrowset('sqloledb','Ä¿µÄ·þÎñÆ÷Ãû';'sa';'',Ä¿µÄÊý¾Ý¿â.dbo.±í)
select * from Ô´Êý¾Ý¿â..±í
²Î¿¼£ºhttp://www.cnblogs.com/lbg280/archive/2009/08/29/1556238.html
Ïà¹ØÎĵµ£º
---------Êýѧº¯Êý
1.¾ø¶ÔÖµ
S:select abs(-1) value
O:select abs(-1) value from dual
2.È¡Õû(´ó)
S:select ceiling(-1.001) value
O:select ceil(-1.001) value from dual
3.È¡Õû£¨Ð¡£©
S:select floor(-1.001) value
O:select floor(-1.001) value from dual
4.È¡Õû£¨½ØÈ¡£©
S:select cast(-1.002 as int) v ......
ͨ¹ýÁ¬½ÓÔËËã·û¿ÉÒÔʵÏÖ¶à¸ö±í²éѯ¡£Á¬½ÓÊǹØϵÊý¾Ý¿âÄ£Ð͵ÄÖ÷ÒªÌص㣬ҲÊÇËüÇø±ðÓÚÆäËüÀàÐÍ
Êý¾Ý¿â¹ÜÀíϵͳµÄÒ»¸ö±êÖ¾¡£
ÔÚ¹ØϵÊý¾Ý¿â¹ÜÀíϵͳÖУ¬±í½¨Á¢Ê±¸÷Êý¾ÝÖ®¼äµÄ¹Øϵ²»±ØÈ·¶¨£¬³£°ÑÒ»¸öʵÌåµÄËùÓÐÐÅÏ¢´æ·ÅÔÚ
Ò»¸ö±íÖС£µ±¼ìË÷Êý¾Ýʱ£¬Í¨¹ýÁ¬½Ó²Ù×÷²éѯ³ö´æ·ÅÔÚ¶à¸ö±íÖеIJ»Í¬ÊµÌåµÄÐÅÏ¢¡£Á¬½Ó²Ù×÷¸øÓû ......
¹¦ÄÜ£º·µ»Ø×Ö·û¡¢¶þ½øÖÆ¡¢Îı¾»òͼÏñ±í´ïʽµÄÒ»²¿·Ö
Óï·¨£ºSUBSTRING ( expression, start, length )
SQL ÖÐµÄ substring º¯ÊýÊÇÓÃÀ´×¥³öÒ»¸öÀ¸Î»×ÊÁÏÖеÄÆäÖÐÒ»²¿·Ö¡£Õâ¸öº¯ÊýµÄÃû³ÆÔÚ²»Í¬µÄ×ÊÁÏ¿âÖв»ÍêÈ«Ò»Ñù£º
²ÎÊý£º
expression ×Ö·û´®¡¢¶þ½øÖÆ×Ö·û´®¡¢Î ......