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Questions tagged
union
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62
votes
4
answers
Quick way to extend a set if we know elements are unique
python
set
union
asked 2013-06-05T12:00:23.853
16
votes
5
answers
Same number of columns for Union Operation
sql
sql-server-2008-r2
union
union-all
asked 2013-01-31T04:53:31.770
21
votes
3
answers
Combine multiple SELECT statements
sql
postgresql
union
asked 2012-08-06T12:58:06.757
35
votes
1
answers
PostgreSQL nested CTE and UNION
sql
postgresql
union
common-table-expression
asked 2012-07-31T13:30:16.570
8
votes
2
answers
How to union across multiple tables in SQLAlchemy?
python
sqlalchemy
union
asked 2012-05-16T01:43:29.427
10
votes
10
answers
Algorithm to take the union of rectangles and to see if the union is still a rectangle
algorithm
union
computational-geometry
asked 2012-02-01T07:51:04.957
43
votes
3
answers
SQL returns less results when using UNION?
sql-server
t-sql
union
asked 2011-09-02T18:49:27.230
75
votes
7
answers
Incorrect usage of UNION and ORDER BY?
mysql
sql-order-by
union
asked 2011-07-18T12:10:00.823
15
votes
3
answers
reverse operation to "Union and find"
algorithm
find
union
asked 2011-06-22T10:00:52.327
206
votes
3
answers
How can I get the intersection, union, and subset of arrays in Ruby?
ruby
union
intersection
subset
asked 2011-04-15T14:18:17.183
39
votes
3
answers
MySQL: FULL OUTER JOIN - How do I merge one column?
sql
mysql
union
full-outer-join
asked 2010-12-11T03:54:15.263
66
votes
7
answers
SELECT INTO USING UNION QUERY
sql
sql-server
t-sql
union
derived-table
asked 2010-10-25T20:46:06.917
57
votes
7
answers
Merge two rows in SQL
sql
join
union
asked 2010-05-31T02:37:14.947
12
votes
3
answers
T-SQL UNION On 3 Tables?
t-sql
union
asked 2010-02-25T17:24:29.057
20
votes
5
answers
Identifying source table from UNION query
sql
union
asked 2009-09-10T12:06:56.777
21
votes
3
answers
Which is faster: Union or Concat?
c#
.net
linq
union
concatenation
asked 2009-08-26T21:48:11.180
67
votes
6
answers
Using union and count(*) together in SQL query
sql
union
asked 2009-08-12T14:48:07.830
18
votes
5
answers
ORDER BY with a UNION of disparate datasets (T-SQL)
sql
sql-server
t-sql
join
union
asked 2009-06-16T22:42:37.927
13
votes
5
answers
Why are UNION queries so slow in MySQL?
mysql
query-optimization
union
asked 2009-05-15T17:59:01.887
87
votes
16
answers
SQL Query - Using Order By in UNION
sql
ms-access
sorting
sql-order-by
union
asked 2008-10-17T21:05:16.053
21
votes
8
answers
How do I Concatenate entire result sets in MySQL?
mysql
sql
union
asked 2008-08-06T18:47:24.137