请问两表结合SQL怎么写？

[wtb119]

表t1：
date num1 name
-------------------------------------------------
20130101 1 张三
20130101 3 李四

表t2：
date num2 name
-------------------------------------------------
20130101 1 张三
20130101 2 张三
20130101 3 李四
20130101 3 李四

现在要求统计成：
date num1 num2_sum name
------------------------------------------------------------------
20130101 1 3 张三
20130101 3 6 李四

请问SQL怎么写？

[WWWWA]

select name,date,sum(iif(bz=1, num1,0)),sum(iif(bz=2, num1,0)), ( select 1 as bz,* from t1 union all select 2 as bz,* from t1 ) a group by name,date

[rabitsky]

select a.date,a.num1,b.num2,a.name from (select date,name,sum(num1) num1 from t1 group by date,name) a join (select date,name,sum(num2) num2 from t2 group by date,name) b on a.date = b.date and a.name = b.name

[wtb119]

t2表 在楼上的SQL表里进了没体现？

[WWWWA]

select name,date,sum(iif(bz=1, num1,0)),sum(iif(bz=2, num1,0)) FROM ;
(;
select 1 as bz,* from t1;
union all;
select 2 as bz,* from t2;
) a;
group by name,date

[lygcw9602]

CREATE CURSOR T1 (DATE C(8),NUM1 N(1),NAME C(10))
INSERT INTO T1 VALUES ([20130101],1,[张三])
INSERT INTO T1 VALUES ([20130101],3,[李四])

CREATE CURSOR T2 (DATE C(8),NUM2 N(1),NAME C(10))
INSERT INTO T2 VALUES ([20130101],1,[张三])
INSERT INTO T2 VALUES ([20130101],2,[张三])
INSERT INTO T2 VALUES ([20130101],3,[李四])
INSERT INTO T2 VALUES ([20130101],3,[李四])
SELECT A.DATE,A.NUM1,NUM2_SUM,A.NAME FROM T1 A ;
 LEFT JOIN (SELECT DATE,SUM(NUM2) NUM2_SUM,NAME FROM T2 GROUP BY 1,3) B ;
 ON A.DATE==B.DATE AND A.NAME==B.NAME