ÎÒÔõô°ÑÒ»¸öexce£¨''£©Éú³ÉµÄ±í²åÈëµ½Ò»¸öÁÙʱ±íÖУ¬ÈçÏÂÃæµÄ¸ñʽµÄ¸ñʽÔõôд£¿
±ÈÈçÕâÀïµÃµ½Ò»¸ö±í£ºexec('select * from student where ÐÕÃû='''+@name+'''')£¬ÎÒÔõô°ÑÕâ¸ö±íµÄÊý¾Ý²åÈëµ½Ò»¸öÁÙʱ±íÀ
insert #tab select exec('select * from student where ÐÕÃû='''+@name+'''')Õâ¸öÔõôÐ޸IJÅÐУ¿
exec('inser ......
select ......,A from table where datetime> '2010-02-03' and datetime< '2010-02-08'
¸ù¾Ý²éѯÌõ¼þdatetimeµÄʱ¼äÉú³ÉÏà¶ÔÓ¦µÄÁÐ
½á¹ûÈçÏ£º
ÁÐÃû£º2010-02-03 2010-02-04 2010-02-05 2010-02-06 2010-02-07 2010-02-08 A
Öµ A1
&n ......
(table1)±íÒ»
a b c
cd ef ...
×Ö·û´®"ab-"
ÓÃselectÓï¾äµÃ³ö½á¹û:ab-cd(¿Õ¸ñ)ef
ʲô¹æÂÉ£¿
û¿´¶®
ÒýÓÃ
(table1)±íÒ»
a b c
cd ef ...
×Ö·û´®"ab-"
ÓÃselectÓï¾äµÃ³ö½á¹û:ab-cd(¿Õ¸ñ)ef
SQL code:
×îºÃ¸ø³öÍêÕûµÄ±í½á¹¹,²âÊÔÊý¾Ý,¼ÆËã·½·¨ºÍÕýÈ·½á¹û.
·¢Ìû×¢ÒâÊÂÏî
htt ......
Êý¾Ý¿âSQL²éѯÓï¾äÈçÏ£º
create view grade_student(ѧºÅ,ÐÕÃû,Ñ¡¿ÎÃÅÊý,ƽ¾ù·Ö,×î¸ß·Ö,×îµÍ·Ö)
as
select sc.sno,sname,count(cno),avg(grade),max(grade),min(grade)
from sc,student
where student.sno=sc.sno
group by sname,sc.sno
ÎÊÌ⣺
ÔÚ×îºóµÄGROUP BY Óï¾ä¼ÓÉϷ⺠......
¸ø³ö±í
id timeSpan
1 5Ìì 10£º00£º00
2 20Ìì 01£º00£º00
3 100Ìì 01£º00£º00
¸ù¾ÝtimeSpanµÃµ½½á¹û
id timeSpan
1 100Ìì 01£º00£º00
2 20Ìì 01£º00£º00
3 5Ìì 10£º00£º00
»¹ÇóÒ»ÌìsqlÓï¾ä½â¾ö´ËÎÊÌâ
SQL code:
--> ²âÊÔÊý¾Ý£º[TB]
if o ......
ÎÒµÄÊý¾Ý¿âÏÖ´æÔÚÈçÏÂÀàÐÍ×ֶκÍÊý¾Ý
A B
712 010101
212 010101
321 010101
434 010101
523 010101
656 010101
ÔõÑù½«B×Ö¶ÎÊý¾ÝʵÏÖÈçÏÂ
712 010101
212 010102
321 010103
434 010104
523 010105
656 010106
SQL code:
......