outer-join

I have two tables, t1 and t2: t1 person | visit | code1 | type1 1 1 50 50 1 1 50 50 1 2 75 50 t2 person | visit | code2 | type2 1 1 50 50 1 1 50 50 1 1 50 50 When SAS runs the following code: DATA t3; MERGE t1 t2; BY person visit; RUN; It generates the following dataset: person | visit | code1 | type1 | code2 | type2 1 1 50 50 50 50 1 1 50 50 50 50 1 1 50 50 50 50 1 2 75 50 I want to replicate this process in SQL, and my idea was to use a full-outer-join. This works unless there are duplicate rows. When we have duplicate rows like in the above example, a full outer join produces the following

So I'm currently transcribing OracleSQL into a new PostgreSQL database. While I'm translating Oracle's (+) joins to LEFT OUTER JOIN s, this works very well. Except when combined with old style joins. Take this OracleSQL for example: SELECT * FROM table1, table2 alias1, table2 alias2, table2 alias3, table3, table4, table5, table6 table6alias WHERE table1.id_table3 = alias1.id_table3 AND table1.id_table4 = alias2.id_table4 AND table1.id_table3 = table3.id_table3 AND table1.id_table4 = table4.id_table4 AND table1.id_table5 = table5.id_table5 AND table1.table1_id_table3_sender = alias3.id_table3 (

I have a static inner class, in which I want to use the outer class's instance variable. Currently, I have to use it in this format "Outerclass.this.instanceVariable", this looks so odd, is there any easier way to access the instance field of the outer class? Public class Outer { private int x; private int y; private static class Inner implements Comparator<Point> { int xCoordinate = Outer.this.x; // any easier way to access outer x ? } } A static nested class cannot reference the outer class instance because it's static , there is no related outer class instance. If you want a static nested

Trying to figure how how to replace the following, with equivalent left outer join: select distinct(a.some_value) from table_a a, table_b b where a.id = b.a_id and b.some_id = 123 and b.create_date < '2014-01-01' and b.create_date >= '2013-12-01' MINUS select distinct(a.some_value) from table_a a, table_b b where a.id = b.a_id and b.some_id = 123 and b.create_date < '2013-12-01' Can not do "NOT IN", as the second query has too much data. SELECT * FROM ( select distinct(a.some_value) from table_a a, table_b b where a.id = b.a_id and b.some_id = 123 and b.create_date < '2014-01-01' and b.create

do you have an idea how to join two tables with the outer join ? Know to do this in SQL, but I need Excel now. I have a list of all employees in one column I have a table of task for every employee. I would like to create a function, that will populate this table with missing employees. Table 1 - list of all employees Fernando Hector Vivian Ivan Table 2 - list of actual tasks Fernando, task A, 5 hours Vivian, task B, 8 hours Result I would like to achieve Fernando, task A, 5 hours Vivian, task B, 8 hours Hector, , 0 hours Ivan, , 0 hours Thanks a lot for any ideas. There is indeed such a thing

I'm trying to get the pairwise products of a vector, say a = c(1,2,3,4) What I'm trying to get is 2,3,4,6,8,12 (in that order). I've tried using outer: outer(1:4,2:4) and that gives me a matrix that includes the products I want but I'm not sure how to extract them from the matrix in a way that scales to vectors of higher dimensions. Thanks! combn() is nice for this sort of thing: a <- 1:4 combn(a, m = 2, FUN = prod) # [1] 2 3 4 6 8 12 lower.tri selects them in that order: out <- outer(1:4,1:4) out[lower.tri(out)] # [1] 2 3 4 6 8 12 来源： https://stackoverflow.com/questions/18899332/r-pairwise