SELECT DISTINCT TWO columns not ranged
How can I select distinct two columns not ranged correctly.
for example:
if I have this table t:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
|| 2 || 3 ||
|| 3 || 1 ||
|| 2 || 1 ||
================
If I choose 1 in my query the result should be:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
================
This table is a result of selecting the rows which has a=1 or b=1 and do not repeat a,b or the inverse.
Details:
The result of SELECT * FROM t WHERE a=1 OR b=1; will be:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
|| 3 || 1 ||
|| 2 || 1 ||
================
I should eliminate the repeated rows normally and inversely.
|| 2 || 1 || will be eliminated because it's the inverse of || 1 || 2 ||
|| 3 || 1 || will be eliminated because it's the inverse of || 1 || 3 ||
The result was shown above.
distinct
asked Mar 9 '16 at 19:43
Safe ModeSafe Mode
1
bumped to the homepage by Community♦ 45 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
How can I select distinct two columns not ranged correctly.
for example:
if I have this table t:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
|| 2 || 3 ||
|| 3 || 1 ||
|| 2 || 1 ||
================
If I choose 1 in my query the result should be:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
================
This table is a result of selecting the rows which has a=1 or b=1 and do not repeat a,b or the inverse.
Details:
The result of SELECT * FROM t WHERE a=1 OR b=1; will be:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
|| 3 || 1 ||
|| 2 || 1 ||
================
I should eliminate the repeated rows normally and inversely.
|| 2 || 1 || will be eliminated because it's the inverse of || 1 || 2 ||
|| 3 || 1 || will be eliminated because it's the inverse of || 1 || 3 ||
The result was shown above.
distinct
asked Mar 9 '16 at 19:43
Safe ModeSafe Mode
1
bumped to the homepage by Community♦ 45 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
How can I select distinct two columns not ranged correctly.
for example:
if I have this table t:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
|| 2 || 3 ||
|| 3 || 1 ||
|| 2 || 1 ||
================
If I choose 1 in my query the result should be:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
================
This table is a result of selecting the rows which has a=1 or b=1 and do not repeat a,b or the inverse.
Details:
The result of SELECT * FROM t WHERE a=1 OR b=1; will be:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
|| 3 || 1 ||
|| 2 || 1 ||
================
I should eliminate the repeated rows normally and inversely.
|| 2 || 1 || will be eliminated because it's the inverse of || 1 || 2 ||
|| 3 || 1 || will be eliminated because it's the inverse of || 1 || 3 ||
The result was shown above.
distinct
asked Mar 9 '16 at 19:43
Safe ModeSafe Mode
1
How can I select distinct two columns not ranged correctly.
for example:
if I have this table t:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
|| 2 || 3 ||
|| 3 || 1 ||
|| 2 || 1 ||
================
If I choose 1 in my query the result should be:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
================
This table is a result of selecting the rows which has a=1 or b=1 and do not repeat a,b or the inverse.
Details:
The result of SELECT * FROM t WHERE a=1 OR b=1; will be:
================
|| a || b ||
=======||=======
|| 1 || 2 ||
|| 1 || 3 ||
|| 3 || 1 ||
|| 2 || 1 ||
================
I should eliminate the repeated rows normally and inversely.
|| 2 || 1 || will be eliminated because it's the inverse of || 1 || 2 ||
|| 3 || 1 || will be eliminated because it's the inverse of || 1 || 3 ||
The result was shown above.
distinct
distinct
asked Mar 9 '16 at 19:43
Safe ModeSafe Mode
1
asked Mar 9 '16 at 19:43
Safe ModeSafe Mode
1
asked Mar 9 '16 at 19:43
Safe ModeSafe Mode
1
asked Mar 9 '16 at 19:43
Safe ModeSafe Mode
1
asked Mar 9 '16 at 19:43
Safe ModeSafe Mode
1
1
bumped to the homepage by Community♦ 45 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 45 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
So the outputs should be { 1, 2 } and { 1, 3 }? I'm sure there's a more efficient way to do it, but if you just need a quick-and-dirty solution, this should work for you on SQL Server:
SELECT
LEFT(Concatenated, CHARINDEX('|', Concatenated) - 1),
SUBSTRING(Concatenated, CHARINDEX('|', Concatenated) + 1, 999)
FROM
(
SELECT DISTINCT
CASE
WHEN A < B
THEN CAST(A AS VARCHAR(10)) + '|' + CAST(B AS VARCHAR(10))
ELSE CAST(B AS VARCHAR(10)) + '|' + CAST(A AS VARCHAR(10))
END AS Concatenated
FROM
T
WHERE
A = 1 OR B = 1
) AS X
edited Mar 9 '16 at 20:08
Zane
2,65221741
answered Mar 9 '16 at 20:00
Jon of All TradesJon of All Trades
3,23842149
Thank you. give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime.
– Safe Mode
Mar 9 '16 at 20:20
add a comment |
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1 Answer
1
active
oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
So the outputs should be { 1, 2 } and { 1, 3 }? I'm sure there's a more efficient way to do it, but if you just need a quick-and-dirty solution, this should work for you on SQL Server:
SELECT
LEFT(Concatenated, CHARINDEX('|', Concatenated) - 1),
SUBSTRING(Concatenated, CHARINDEX('|', Concatenated) + 1, 999)
FROM
(
SELECT DISTINCT
CASE
WHEN A < B
THEN CAST(A AS VARCHAR(10)) + '|' + CAST(B AS VARCHAR(10))
ELSE CAST(B AS VARCHAR(10)) + '|' + CAST(A AS VARCHAR(10))
END AS Concatenated
FROM
T
WHERE
A = 1 OR B = 1
) AS X
edited Mar 9 '16 at 20:08
Zane
2,65221741
answered Mar 9 '16 at 20:00
Jon of All TradesJon of All Trades
3,23842149
Thank you. give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime.
– Safe Mode
Mar 9 '16 at 20:20
add a comment |
So the outputs should be { 1, 2 } and { 1, 3 }? I'm sure there's a more efficient way to do it, but if you just need a quick-and-dirty solution, this should work for you on SQL Server:
SELECT
LEFT(Concatenated, CHARINDEX('|', Concatenated) - 1),
SUBSTRING(Concatenated, CHARINDEX('|', Concatenated) + 1, 999)
FROM
(
SELECT DISTINCT
CASE
WHEN A < B
THEN CAST(A AS VARCHAR(10)) + '|' + CAST(B AS VARCHAR(10))
ELSE CAST(B AS VARCHAR(10)) + '|' + CAST(A AS VARCHAR(10))
END AS Concatenated
FROM
T
WHERE
A = 1 OR B = 1
) AS X
edited Mar 9 '16 at 20:08
Zane
2,65221741
answered Mar 9 '16 at 20:00
Jon of All TradesJon of All Trades
3,23842149
Thank you. give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime.
– Safe Mode
Mar 9 '16 at 20:20
add a comment |
So the outputs should be { 1, 2 } and { 1, 3 }? I'm sure there's a more efficient way to do it, but if you just need a quick-and-dirty solution, this should work for you on SQL Server:
SELECT
LEFT(Concatenated, CHARINDEX('|', Concatenated) - 1),
SUBSTRING(Concatenated, CHARINDEX('|', Concatenated) + 1, 999)
FROM
(
SELECT DISTINCT
CASE
WHEN A < B
THEN CAST(A AS VARCHAR(10)) + '|' + CAST(B AS VARCHAR(10))
ELSE CAST(B AS VARCHAR(10)) + '|' + CAST(A AS VARCHAR(10))
END AS Concatenated
FROM
T
WHERE
A = 1 OR B = 1
) AS X
edited Mar 9 '16 at 20:08
Zane
2,65221741
answered Mar 9 '16 at 20:00
Jon of All TradesJon of All Trades
3,23842149
So the outputs should be { 1, 2 } and { 1, 3 }? I'm sure there's a more efficient way to do it, but if you just need a quick-and-dirty solution, this should work for you on SQL Server:
SELECT
LEFT(Concatenated, CHARINDEX('|', Concatenated) - 1),
SUBSTRING(Concatenated, CHARINDEX('|', Concatenated) + 1, 999)
FROM
(
SELECT DISTINCT
CASE
WHEN A < B
THEN CAST(A AS VARCHAR(10)) + '|' + CAST(B AS VARCHAR(10))
ELSE CAST(B AS VARCHAR(10)) + '|' + CAST(A AS VARCHAR(10))
END AS Concatenated
FROM
T
WHERE
A = 1 OR B = 1
) AS X
edited Mar 9 '16 at 20:08
Zane
2,65221741
answered Mar 9 '16 at 20:00
Jon of All TradesJon of All Trades
3,23842149
edited Mar 9 '16 at 20:08
Zane
2,65221741
edited Mar 9 '16 at 20:08
Zane
2,65221741
edited Mar 9 '16 at 20:08
Zane
2,65221741
2,65221741
answered Mar 9 '16 at 20:00
Jon of All TradesJon of All Trades
3,23842149
answered Mar 9 '16 at 20:00
Jon of All TradesJon of All Trades
3,23842149
answered Mar 9 '16 at 20:00
Jon of All TradesJon of All Trades
3,23842149
3,23842149
Thank you. give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime.
– Safe Mode
Mar 9 '16 at 20:20
add a comment |
Thank you. give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime.
– Safe Mode
Mar 9 '16 at 20:20
Thank you. give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime.
– Safe Mode
Mar 9 '16 at 20:20
Thank you. give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime.
– Safe Mode
Mar 9 '16 at 20:20
add a comment |
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