[SQL Server] µ¼³ö±í½á¹¹(Êý¾Ý×Öµä)
-- Êý¾Ý×Öµä
SELECT
(case when a.colorder=1 then d.name else '' end)±íÃû,
a.colorder ×Ö¶ÎÐòºÅ,
a.name ×Ö¶ÎÃû,
(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) ±êʶ,
(case when (SELECT count(*)
from sysobjects
WHERE (name in
(SELECT name
from sysindexes
WHERE (id = a.id) AND (indid in
(SELECT indid
from sysindexkeys
WHERE (id = a.id) AND (colid in
(SELECT colid
from syscolumns
&nb
Ïà¹ØÎĵµ£º
ÔÚ½éÉÜGROUP BY ºÍ HAVING ×Ó¾äǰ£¬ÎÒÃDZØÐèÏȽ²½²sqlÓïÑÔÖÐÒ»ÖÖÌØÊâµÄº¯Êý£º¾ÛºÏº¯Êý£¬ÀýÈçSUM, COUNT, MAX, AVGµÈ¡£ÕâЩº¯ÊýºÍÆäËüº¯ÊýµÄ¸ù±¾Çø±ð¾ÍÊÇËüÃÇÒ»°ã×÷ÓÃÔÚ¶àÌõ¼Ç¼ÉÏ¡£
SELECT SUM(population) from bbc
¡¡¡¡ÕâÀïµÄSUM×÷ÓÃÔÚËùÓзµ»Ø¼Ç¼µÄpopulation×Ö¶ÎÉÏ£¬½á¹û¾ÍÊǸòéÑ ......
»ù±¾ÉϾÍÊÇÕâЩ²½Ö裺
ÏÂÔØÄãÒªÁ¬½ÓµÄÊý¾Ý¿âµÄJDBCÇý¶¯³ÌÐò£¨driver£©¡£Í¨³£¶¼ÊÇÒ»¸öjarÎļþ£¬¸´ÖƵ½ÄãµÄprojectÀïÃæ£¬È·±£Ê¶±ðÕâ¸ö¿â¾Í¿ÉÒÔÁË¡£
¼ÓÔØÇý¶¯£¬ ²»Í¬µÄÊý¾Ý¿âÐèÒª²»Í¬ JDBC driver¡£
Á¬½ÓÊý¾Ý¿â£¬²»Í¬µÄÊý¾Ý¿âͬÑùÐèÒª²»Í¬µÄJDBC URL¡£
ÏÂÃæ¸ø³öÁ¬½Ó²»Í¬Êý¾Ý¿âµÄÀý×Ó
Á¬½Ó mini SQL
// Establish a ......
ÊÓͼ²Ù×÷
ÊÓͼÊÇ´ÓÒ»¸ö»òÕß¶à¸ö±í»òÊÓͼÖе¼³öµÄ±í£¬Æä½á¹¹ºÍÊý¾ÝÊǽ¨Á¢ÔÚ¶Ô±íµÄ²éѯ»ù´¡Éϵġ£ÓëÕæÊµµÄ±íÒ»Ñù£¬ÊÓͼҲ°üÀ¨¼¸¸ö±»¶¨ÒåµÄÊý¾ÝÁкͶà¸öÊý¾ÝÐУ¬µ«ÕâЩÊý¾Ýʵ¼ÊÉÏÊDZ»ÆäÒýÓÃµÄÆäËû±íÖеÄÊý¾Ý¡£Òò´Ë£¬ÊÓͼ²»ÊÇÕæÊµ´æÔڵĻù´¡±í£¬¶øÊÇÒ»¸öÐéÄâµÄ±í£¬ÊÓͼËù¶ÔÓ¦µÄÊý¾Ý²¢²»Êµ¼ÊµØÒÔÊÓͼ½á¹¹´æ´¢ÔÚÊý¾Ý¿âÖУ¬¶øÊÇ´æ ......
sql
ÖÐ case when Óï·¨
sqlÓïÑÔÖÐÓÐûÓÐÀàËÆCÓïÑÔÖеÄswitch caseµÄÓï¾ä£¿£¿
ûÓÐ,ÓÃcase when À´´úÌæ¾ÍÐÐÁË.
ÀýÈç,ÏÂÃæµÄÓï¾äÏÔʾÖÐÎÄÄêÔÂ
select getdate() as &n ......
ÈÕÆÚºÍʱ¼äº¯Êý¶Ô½¨Á¢Ò»¸öÕ¾µãÊǷdz£ÓÐÓõġ£Õ¾µãµÄÖ÷ÈËÍùÍù¶ÔÒ»¸ö±íÖеÄÊý¾ÝºÎʱ±»
¸üиÐÐËȤ¡£Í¨¹ýÈÕÆÚºÍʱ¼äº¯Êý£¬Äã¿ÉÒÔÔÚºÁÃë¼¶¸ú×ÙÒ»¸ö±íµÄ¸Ä±ä¡£
·µ»Øµ±Ç°ÈÕÆÚºÍʱ¼ä
ͨ¹ýº¯ÊýGETDATE£¨£©£¬Äã¿ÉÒÔ»ñµÃµ±Ç°µÄÈÕÆÚºÍʱ¼ä¡£ÀýÈ磬Óï¾äSELECT GETDATE()
·µ»ØÈçϵĽá¹û£º
…………&h ......