请教各位DB高手个SQL问题 现在有个#Temp Table Name T_ID Count ------------------- A A B C X -------------------- 和 Table T T_ID Name -------------------- 1 A 2 B 3 C --------------------- 现在要Update #Temp table from T WHERE T.Name = #Temp.Name 最后#Temp table的结果应该是 Name T_ID Count ------------------- A 1 2 A 1 2 B 2 1 C 3 1 X NULL 0 -------------------- 这个Update该怎么写?
http://www.computationalmathematics.org/topics/files/calling_cuda_from_fortran.html Calling Cuda Functions from Fortran Author: Austen Duffy, Florida State University Cuda functions can be called directly from fortran programs by using a kernel wrapper as long as some simple rules are followed. 1. Data Types: Make sure you use equivalent data types, these basically follow from fortran --> C conventions. Make sure to specify fortran integers and reals, note that integer*2 is a short int in C, I h
【在 D******y 的大作中提到】 : if CentOS, run : service httpd reload
r*o
17 楼
好像只能两步了 UPDATE #Temp SET T_ID = T.T_ID FROM T INNER JOIN #Temp ON #Temp.Name = T. Name UPDATE #Temp SET Count = TCount FROM (SELECT Count(*) TCount, T_ID FROM #Temp GROUP BY T_ID) T INNER JOIN #Temp ON #Temp.T_ID = T.T_ID
【在 r***o 的大作中提到】 : 好像只能两步了 : UPDATE #Temp SET T_ID = T.T_ID FROM T INNER JOIN #Temp ON #Temp.Name = T. : Name : UPDATE #Temp SET Count = TCount FROM : (SELECT Count(*) TCount, T_ID FROM #Temp GROUP BY T_ID) T : INNER JOIN #Temp ON #Temp.T_ID = T.T_ID
【在 y****w 的大作中提到】 : update temp x set (t_id, count) = ( select t.t_id, count(*) from t join : temp t1 on t.name = t1.name where t1.name = x.name group by t.t_id,t.name)
a*e
33 楼
depends on location. in some location, a piece of cake. in some other places, probably you need 2 years experience to reach that level.
update temp x set (t_id, count) = ( select t.t_id, count(t1.t_id) from temp t1 left join t on t.name = t1.name where t1.name = x.name group by t.t_id,t .name)
【在 y****w 的大作中提到】 : update temp x set (t_id, count) = ( select t.t_id, count(t1.t_id) from temp : t1 left join t on t.name = t1.name where t1.name = x.name group by t.t_id,t : .name)
y*w
40 楼
update t set a=(select..), b = (select...)*写*起来会更容易些.