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sel *A union all sel * B union all sel * C
I need this statement result in a table for calculation
A,B,C contains same columns but different values
I don't know what you mean by volatile but if you are looking for the results of your query in one table you can use something like the below
INSERT INTO TARGET_TABLE
SELECT * FROM A
UNION ALL
SELECT * FROM B
UNION ALL
SELECT * FROM C;
If you dont want duplicate values you can replace UNION ALL by UNION
Related
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Write a query using Union all that performs the function of UNION?
UNION ALL returns all the records while UNION returns distinct records.
so you can use the DISTINCT with UNION ALL to make query same as UNION as follows:
select distinct t.* from
(select * from table1
UNION ALL
select * from table2) t
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I am using 11g RDBMS and in one interview interviewer ask me that print 1 to 10 numbers using SQL query don't use loop if you are using PLSQL, means using select query he wants to see the result.
like Table:
1
2
3
Here are two approaches, both are SQL Server syntax, but you will find something similar for other RDBMs:
--ROW_NUMBER()
SELECT TOP 10 ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) FROM sys.objects; --any table with more rows than 10 will do
--recursive CTE
WITH recursiveCounter AS
(
SELECT 1 AS Nr
UNION ALL
SELECT r.Nr+1
FROM recursiveCounter AS r
WHERE r.Nr<10
)
SELECT * FROM recursiveCounter
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I have a simple question: I would like to know how to display records from my database starting from the second record.
Thank you!
If you have a column that specifies the ordering, the ANSI standard way to do this is:
select t.*
from table t
order by col
offset 1 row;
Try this:
select * from
(select
*,
ROW_NUMBER() over (order by TableId) as rn
from TableName) dane where rn>1
in MSSQL.
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What is the meaning (result) of this SQL statement in layman's term?:
SELECT mainTable.Year FROM mainTable
UNION SELECT mainTable.Title FROM mainTable
In set theory
if A={1,2,3} and B={2,3,4,5} then A union B={1,2,3,4,5} -- No duplicates here!
where as A union all B={1,2,3,2,3,4,5} --with duplicates
similarly in sql
its written like
select * from A
union -- or union all
select * from B
SEE HERE
The UNION combines two results.
When you have two SELECT statements, all of them has a result. If those results contain equivalent number of columns (and those - the ones which are at the same position - column's datatypes are equal or compatible with eachother), you can get those results combined into one result.
The UNION will filter out the duplications. You can use UNION ALL to prevent filtering.
See this SQLFiddle demo: http://sqlfiddle.com/#!2/42569/2
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Hi I am trying to find duplicates with the same ID. I am not finding all of the duplicates. I would like to find distinct JOIN_FID values, and then duplicate JOIN FID values.
Here is my SQL select statements.
select OBJECTID,
Join_Count,
TARGET_FID,
JOIN_FID,
StrtConcat,
PermID,
Minutes,
FacilityID,
Shape
from
sde.gis.MFD_8_minute_response_ladder
where TARGET_FID
in (
select
JOIN_FID
from
sde.gis.MFD_8_minute_response_ladder
group by
JOIN_FID
having
COUNT(*) > 1
You're missing a closing parenthesis ()), but I assume that's a typo.
I suspect the problem may be that you're comparing two different fields:
where TARGET_FID
in (
select
JOIN_FID
Should that be:
where TARGET_FID
in (
select
TARGET_FID
or
where JOIN_FID
in (
select
JOIN_FID
?
For the query that you added ,an IN subquery can only return one value, so you need something like:
where PermID
in (
select
COUNT(1),
TARGET_FID
making sure you're comparing the right columns.