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CONVERT(data_type,expression[,style])
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SELECT CONVERT(varchar(100), GETDATE(), 0): 05 16 2006 10:57AM
SELECT CONVERT(varchar(100), GETDATE(), 1): 05/16/06
SELECT CONVERT(varchar(100), GETDATE(), 2): 06.05.16
SELECT CONVERT(varchar(100), GETDATE(), 3): 16/05/06
SELECT CONVERT(varchar(100), GETDATE(), 4): 16.05.06
SELECT CONVERT(varchar(100), GETDATE(), 5): 16-05-06
SELECT CONVERT(varchar(100), GETDATE(), 6): 16 05 06
SELECT CONVERT(varchar(100), GETDATE(), 7): 05 16, 06
SELECT CONVERT(varchar(100), GETDATE(), 8): 10:57:46
SELECT CONVERT(varchar(100), GETDATE(), 9): 05 16 2006 10:57:46:827AM
SELECT CONVERT(varchar(100), GETDATE(), 10): 05-16-06
SELECT CONVERT(varchar(100), GETDATE(), 11): 06/05/16
SELECT CONVERT(varchar(100), GETDATE(), 12): 060516
SELECT CONVERT(varchar(100), GETDATE(), 13): 16 05 2006 10:57:46:937
SELECT CONVERT(varchar(100), GETDATE(), 14): 10:57:46:967
SELECT CONVERT(varchar(100), GETDATE(), 20): 2006-05-16 10:57:47
SELECT CONVERT(varchar(100), GETDATE(), 21): 2006-05-16 10:57:47.157
SELECT CONVERT(varchar(100), GETDATE(), 22): 05/16/06 10:57:47 AM
SELECT CONVERT(varchar(100), GETDATE(), 23): 2006-05-16
SELECT CONVERT(varchar(100), GETDATE(), 24): 10:57:47
SELECT CONVERT(varchar(100), GETDATE(), 25): 2006-05-16 10:57:47.250
SELECT CONVERT(varchar(100), GETDATE(), 100): 05 16 2006 10:57AM
SELECT CONVERT(varchar(100), GETDATE(), 101): 05/16/2006
SELECT CONVERT(varchar(100), GETDATE(), 102): 2006.05.16
SELECT CONVERT(varchar(100), GETDATE(), 103): 16/05/2006
SELECT CONVERT(varchar(100), GETDATE(), 104): 16.05.2006
SELECT CONVERT(varchar(100), GETDATE(), 105): 16-05-2006
SELECT CONVERT(varchar(100), GETDATE(), 106): 16 05 2006
SELECT CONVERT(varchar(100), GETDATE(), 107): 05 16, 2006
SELECT CONVERT(varchar(100), GETDATE(), 108): 10:57:49
SELECT CONVERT(varchar(100), GETDATE(), 109): 05 16 2006 10:57:49:437AM
SELECT CONVERT(varchar(100), GETDA


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sql convertÈÕÆÚʱ¼ä¸ñʽ

--²éѯÏÖÔÚÈÕÆÚ£¬Ö»ÒªÄêÔÂÈÕ
 select convert(varchar(10),getDate(),120)
--²éѯÏÖÔÚÈÕÆÚ£¬Ö»ÒªÊ±·ÖÃë
select convert(varchar(8),getDate(),8)
Convertº¯ÊýµÄһЩ˵Ã÷£¬ÒÔÏÂ×ÊÁÏÀ´Ô´ÓÚÍøÂç
²»´øÊÀ¼ÍÊýλ (yy)
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ÊäÈë ......

SQL SERVER º¯Êý£¨×ª£©

SQLServer»ù±¾º¯Êý
1.×Ö·û´®º¯Êý £º
×Ö·û²Ù×÷Àà £º
upper(char_expr) תΪ´óд
lower(char_expr) תΪСд
UCase(string) ·µ»Ø Variant (String)£¬ÆäÖаüº¬×ª³É´óдµÄ×Ö·û´®¡£
LCase(string) ·µ»Ø×Ö·û´®µÄСдÐÎʽ¡£
space(int_expr) Éú³Éint_expr¸ö¿Õ¸ñ
replicate(char_expr,int_expr) ¸´ÖÆ×Ö·û´®int_expr´Î ......

shp Îļþµ¼³ösql»òµ¼Èëpostgis

1.Ö±½Óµ¼ÈëÊý¾Ý¿â
   shp2pgsql -s "4326" -W "GBK" E:\shape\Road_polyline.shp  
road_cross| psql -U postgres -h 172.17.40.83 -d test
2.µ¼³ösql
   shp2pgsql -s "4326" E:\shape\Road_polyline.shp blocks >
E:\roadcross\blocks.sql
3 ......

35Ìõ»ù±¾SQLÓï¾ä

 1¡¢²éÕÒÔ±¹¤µÄ±àºÅ¡¢ÐÕÃû¡¢²¿ÃźͳöÉúÈÕÆÚ£¬Èç¹û³öÉúÈÕÆÚΪ¿ÕÖµ£¬ÏÔʾÈÕÆÚ²»Ïê,²¢°´²¿ÃÅÅÅÐòÊä³ö,ÈÕÆÚ¸ñʽΪyyyy-mm-dd¡£
select
emp_no,emp_name,dept,isnull(convert(char(10),birthday,120),'ÈÕÆÚ²»Ïê') birthday
from employee
order by dept
 
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2¡¢²éÕÒÓëÓ÷×ÔÇ¿ÔÚͬһ¸öµ¥Î»µÄÔ±¹¤ÐÕÃû¡¢ÐÔ±ð¡ ......

SQL Server 2005 CTEµÄÓ÷¨

if object_id('[tb]') is not null
drop table [tb] 
go
create table [tb]([id] int,[col1] varchar(8),[col2] int) 
insert [tb] 
select 1,'ºÓ±±Ê¡',0 union all
 select 2,'ÐĮ̈ÊÐ',1 union all
 select 3,'ʯ¼ÒׯÊÐ',1 union all
 select 4,'ÕżҿÚÊÐ',1 union all
&n ......
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