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How to achieve function overloading in C?
...A common idiom to solve the problem is making the function accept a tagged union. This is implemented by a struct parameter, where the struct itself consists of some sort of type indicator, such as an enum, and a union of the different types of values. Example:
#include <stdio.h>
typedef enu...
SQL JOIN and different types of JOINs
...
These pictures seem to imply that union is same as full outer join and intersection is same as inner join which is not correct as far as I know.
– mightyWOZ
Jun 16 '17 at 5:13
...
How to get cumulative sum
... let put some data in the table**
Insert Into CUMULATIVESUM
Select 1, 10 union
Select 2, 2 union
Select 3, 6 union
Select 4, 10
here I am joining same table (SELF Joining)
Select c1.ID, c1.SomeValue, c2.SomeValue
From CumulativeSum c1, CumulativeSum c2
Where c1.id >= c2.ID
Order By c1.i...
LINQ - Full Outer Join
.... The idea is to take a left outer join and right outer join then take the union of the results.
var firstNames = new[]
{
new { ID = 1, Name = "John" },
new { ID = 2, Name = "Sue" },
};
var lastNames = new[]
{
new { ID = 1, Name = "Doe" },
new { ID = 3, Name = "Smith" },
};
var left...
sql query to return differences between two tables
...
( SELECT * FROM table1
EXCEPT
SELECT * FROM table2)
UNION ALL
( SELECT * FROM table2
EXCEPT
SELECT * FROM table1)
share
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Is there a combination of “LIKE” and “IN” in SQL?
...t; create table mytable (something)
2 as
3 select 'blabla' from dual union all
4 select 'notbla' from dual union all
5 select 'ofooof' from dual union all
6 select 'ofofof' from dual union all
7 select 'batzzz' from dual
8 /
Table created.
The original syntax:
SQL> select...
SQL MAX of multiple columns?
...ate
FROM ( SELECT d.date1 AS dDate
UNION
SELECT d.date2
UNION
SELECT d.date3
) a
) MaxDate ,
Cost
FROM dates d
GO
Solution 3 (Simulated UNPIVOT)
;...
What is the purpose of Order By 1 in SQL select statement?
...ted and working in SQL Server ;WITH cte AS( SELECT 1 AS Col1, 'z' AS Col2 UNION SELECT 2 AS Col1, 'y' AS Col2 UNION SELECT 3 AS Col1, 'x' AS Col2 ) SELECT Col2, Col1 FROM cte ORDER BY 1
– Ivanzinho
Aug 27 '18 at 20:20
...
A better similarity ranking algorithm for variable length strings
...tr2.length-2).collect {|i| str2[i,2]}.reject {
|pair| pair.include? " "}
union = pairs1.size + pairs2.size
intersection = 0
pairs1.each do |p1|
0.upto(pairs2.size-1) do |i|
if p1 == pairs2[i]
intersection += 1
pairs2.slice!(i)
break
end
end
end
(2.0 * inter...
What does |= (ior) do in Python?
...ace+ operation between pairs of objects. In particular, between:
sets: a union operation
dicts: an update operation
counters: a union (of multisets) operation
numbers: a bitwise OR, binary operation
In most cases, it is related to the | operator. See examples below.
Sets
For example, the union o...