sql server Êý¾Ý¿âµ¼ÈëÎÊÌâ
ÓÉÓÚÍøÕ¾ÊDZðÈ˵Ä
sql server 2000 ²»Äܵ¼Èë2005 µÄÊý¾Ý¿âÎļþ ÎÒÖ»ºÃ°´ÕÕÊéÉÏÖØÐ½¨Á¢µÄÊý¾Ý¿âÎļþ
È»ºóÔÚvisual studio 2005ÖÐÒ»¸öÒ»¸öµÄ¸´ÖÆ´æ´¢¹ý³Ìµ½sql server 2000
ÕâÑù¾Í²»ÓÃÏÂÔØ sql server 2005 ÁË
Èç¹ûÓÐsql server 2005 µÄ»°Ö®¼ÊÉú³É ½Å±¾¾ÍÒ»ÖÂÐÔµ¼Èë¾ÍokÁË
Ïà¹ØÎĵµ£º
1£®SQL²¢Ðвéѯ
alter session enable parallel dml execute immediate 'alter session enable parallel dml'; --Ð޸ĻỰ²¢ÐÐDML select /*+parallel(a,4)*/ * from table_name a select /*+parallel(a,8)*/ * from table_name a &nbs ......
create table tabReProc
(
name varchar(30),
age integer,
primary key(name,age)
)
insert into tabReProc values('x7700',20)
insert into tabR ......
(1)Êý¾Ý¼Ç¼ɸѡ£º
sql="select*fromÊý¾Ý±íwhere×Ö¶ÎÃû=×Ö¶ÎÖµorderby×Ö¶ÎÃû[desc]"
sql="select*fromÊý¾Ý±íwhere×Ö¶ÎÃûlike'%×Ö¶ÎÖµ%'orderby×Ö¶ÎÃû[desc]"
sql="selecttop10*fromÊý¾Ý±íwhere×Ö¶ÎÃûorderby×Ö¶ÎÃû[desc]"
sql="select*fromÊý¾Ý±íwhere×Ö¶ÎÃûin('Öµ1','Öµ2','Öµ3')"
sql="select*fromÊý¾Ý±íwhere× ......
ÎÒÀí½âµÄSQL Server 2005¾µÏñÅäÖÃʵ¼ÊÉϾÍÊÇÓÉÈý¸ö·þÎñÆ÷£¨Ò²¿ÉÒÔÊÇͬһ·þÎñÆ÷µÄÈý¸ö SQL ʵÀý£©×é³ÉµÄÒ»¸ö±£Ö¤Êý¾ÝµÄ»·¾³£¬·Ö±ðÊÇ£ºÖ÷·þÎñÆ÷¡¢´Ó·þÎñÆ÷¡¢¼ûÖ¤·þÎñÆ÷¡£
Ö÷·þÎñÆ÷£ºÊý¾Ý´æ·ÅµÄµØ·½
´Ó·þÎñÆ÷£ºÊý¾Ý±¸·ÝµÄµØ·½£¨¼´£ºÖ÷·þÎñÆ÷µÄ¾µÏñ£©
¼ûÖ¤·þÎñÆ÷£º¶¯Ì¬µ÷ÅäÖ÷/´Ó·þÎñÆ÷µÄµÚÈý·½·þÎñÆ÷
»·¾³½éÉÜ
Ê×ÏȽé ......
º¯Êý¼ò½é:¡¡¡¡
·µ»Ø Variant (Long) µÄÖµ£¬±íʾÁ½¸öÖ¸¶¨ÈÕÆÚ¼äµÄʱ¼ä¼ä¸ôÊýÄ¿¡£
º¯ÊýÓï·¨:
¡¡¡¡DateDiff(interval, date1, date2[, firstdayofweek[, firstweekofyear]])
DateDiff º¯ÊýÓï·¨ÖÐÓÐÏÂÁÐÃüÃû²ÎÊý£º
¡¡¡¡interval ±ØÒª¡£×Ö·û´®±í´ïʽ£¬±íʾÓÃÀ´¼ÆËãdate1 ºÍ date2 µÄʱ¼ä²îµÄʱ¼ä¼ ......