sqlÖÐÑ»·²åÈë´óÁ¿²âÊÔÊý¾Ý
declare @a int
set @a = 1
while @a<1000000
begin
insert into Test(name) values(@a)
set @a = @a + 1
end
Ïà¹ØÎĵµ£º
½ñÌìµ÷ÊÔ·þÎñÆ÷£¬´´½¨ÁËÒ»¸öеÄÊý¾Ý¿âÓû§£¬Ïë¸øËû·ÖÅäЩȨÏÞ£¬¹ÜÀíÆäÖеÄÒ»¸öÊý¾Ý¿â¡£µ«ÊǵÈÒ»Çж¼´´½¨ºÃÁË£¬È´·¢ÏÖËûÁ¬µÇ½¶¼Ã»°ì·¨µÇ½¡£Ææ¹Ö£¬dbaµÄ½ÇÉ«¶¼¸øÁË»¹ÊDz»ÐС£
²é¿´ÎÊÌ⣬ÕÒ³ö½â¾ö·½°¸£º
ÆóÒµ¹ÜÀíÆ÷(2000)»òÕßmangement studioÁ¬½ÓÄãµÄʵÀý--ÓÒ¼üʵÀý--ÊôÐÔ--°²È«ÐÔÀïÃæ¿´¿´Éí·ÝÑé֤ģʽÊÇ·ñΪ"sql server ......
½ñÌìÅöµ½Ò»¸ösql:0206nµÄ´íÎó£¬ÎÒʹÓÃselect * from xxx¿ÉÒԲ鿴±í½á¹¹ºÍÄÚÈÝ£¬È»¶øµ±ÎÒʹÓÃselect aaa from xxxµÄʱºòÈ´¸øÎÒ±¨´í£¬×îºóÅŲéÔÒòÊÇÎÒʹÓù¤¾ß½¨±í£¬½¨±íÓï¾äÊÇÀàËÆÕâÑùµÄ£ºcreate table("id" int,"name" varchar)£¬ºÃÁ˽á¹û¾ÍÊÇ×ֶθø¼ÓÁËÒýºÅ£¬ÔÚ²éѯµÄʱºòʹÓÃ*¿ÉÒÔ²éѯ£¬Ê¹Óõ¥¸ö×ֶβ»Äܲéѯ£¬ÎÒ¹À¼Æ¾ÍÊ ......
ÔÚOracle SQLÖÐÈ¡Êý¾ÝʱÓÐʱҪÓõ½in ºÍ exists ÄÇôËûÃÇÓÐʲôÇø±ðÄØ£¿
1 ÐÔÄÜÉϵıȽÏ
±ÈÈçSelect * from T1 where x in ( select y from T2 )
Ö´ÐеĹý³ÌÏ൱ÓÚ:
select *
from t1, ( select distinct y from t2 ) t2
where t1.x = t2.y;
숦﵀
select * from t1 where exists ( select null fro ......
ÔÚSQL¿ç±í×éºÏ²éѯ´æÔÚЧÂÊÎÊÌ⣬¾ÙÀý±ÈÈç
delete from media_source where movie_id in ( select media_id from media where type=2 ) and origin = 3;
ºÍ
delete from media_source where origin = 3 and movie_id in ( select media_id from media where type=2 );
µÄЧÂÊÊDz»Ò»ÑùµÄ¡£
Èôorigin=3µÄÇé¿öÏÂmedia_so ......
Ò»¡¢
SQL SERVER
ºÍ
ACCESS
µÄÊý¾Ýµ¼Èëµ¼³ö
³£¹æµÄÊý¾Ýµ¼Èëµ¼³ö£º
ʹÓÃDTSÏòµ¼Ç¨ÒÆÄãµÄAccessÊý¾Ýµ½SQL Server£¬Äã¿ÉÒÔʹÓÃÕâЩ²½Öè:
¡¡¡¡
1
ÔÚSQL SERVERÆóÒµ¹ÜÀíÆ÷ÖеÄTools£¨¹¤¾ß£©²Ëµ¥ÉÏ£¬Ñ¡ÔñData Transformation
¡¡¡¡
2
Services£¨Êý¾Ý ......