I have a table with three columns.
I query that table with IN clause.
select column1 from table1 where column1 in (1,2,3) order by column2, column3
The table1 contains only values 1 and 2 in column1. I want to return the not available value also in my result, and that should be sorted in the bottom.
example data
column1 column 2 column 3
1 100 11
2 101 50
output, the not available values should be in the last.
column1 column 2 column 3
1 100 11
2 101 50
3 null null
I tried with subquery with NVL, like select nvl((select.. in(1,2,3)),null) from dual, due to IN Clause, I am getting single row subquery returns more than one row issue, which is expected.
Also tried with the union but nothing works. Great if any help. Thanks
I think you can do it with a union all:
select column1 from table1 where column1 in (1,2,3) order by column2, column3
union all
select null from table1 where column1 not in (1,2,3) order by column2, column3
If you can't take 1,2,3 values from another table you can try with:
with t1 as (
select col1,col2,col3
from tab1
where cod_flusso in ('1','2','3')),
t2 as (
select '1' as col1,null,null
from dual
union
select '2',null,null
from dual
union
select '3',null,null
from dual)
select t2.col1,col2,col3
from t2
left outer join t1
on t1.col1= t2.col1
It's better if you can store 1,2,3 values in a second table, then use left outer join.
Related
Just wondering why the following select isn't working:
SELECT
A.FIELD1
, (SELECT PCN FROM (select B.PRIORITY, B.PCN
from
TABLE2 B
WHERE B.CUST= A.CUST
ORDER BY B.PRIORITY)
WHERE ROWNUM = 1) AS PCN
FROM TABLE1 A;
ERROR at line 2: ORA-00904: "A"."CUST": invalid identifier
Important to mention:
TABLE1 has as fields FIELD1, CUST.
TABLE2 has as fields PCN, PRIORITY, CUST.
Thanks in advance.
Your query shouldn't give you that error message, on when you remove the outer qiery this would happen
CREATE tABLE TABLE1 (FIELD1 int, CUST int)
INSERT INTO TABLE1 VALUES(1,1)
1 rows affected
CREATE TABLE TABLE2 (PCN int, PRIORITY int, CUST int)
INSERT INTO TABLE2 VALUES (1,1,1)
1 rows affected
SELECT
A.FIELD1
, (SELECT PCN FROM (select B.PRIORITY, B.PCN
from
TABLE2 B
WHERE B.CUST= A.CUST
ORDER BY B.PRIORITY)
WHERE ROWNUM = 1) AS PCN
FROM TABLE1 A;
FIELD1
PCN
1
1
fiddle
You can't nest inline selects (more than one level) without losing the ability of the inner nested selects being able to reference the parent block. So your query on TABLE2 cannot see the columns from TABLE1 because of this nesting.
Try this:
SELECT a.field1,
pcn.pcn
FROM table1 a,
(SELECT b.cust,
b.priority,
b.pcn,
ROW_NUMBER() OVER (PARTITION BY b.cust ORDER BY b.priority DESC) seq
FROM table2 b) pcn
WHERE a.cust = pcn.cust(+)
AND pcn.seq(+) = 1
That will work well for report queries. If you end up adding a filter on a specific customer, then you would be better off using OUTER APPLY if you have a recent-enough version of Oracle that supports that.
You could try this:
SELECT
A.FIELD1
, (SELECT B.PCN
from
TABLE2 B
WHERE B.CUST= A.CUST
ORDER BY B.PRIORITY
FETCH FIRST 1 ROWS ONLY) AS PCN
FROM TABLE1 A;
FETCH FIRST 1 ROWS ONLY gets you the first ordered record. Works on 12c and up and supports nesting, and no 2nd subquery needed.
Yet another option might be a CTE.
Sample data:
SQL> with
2 table1 (field1, cust) as
3 (select 1, 100 from dual union all
4 select 2, 200 from dual
5 ),
6 table2 (pcn, priority, cust) as
7 (select 10, 1, 100 from dual union all
8 select 20, 2, 100 from dual union all
9 select 30, 1, 200 from dual
10 ),
Query begins here. Rank rows by priority, and then fetch the ones that rank as the highest (line #20):
11 temp as
12 (select a.field1,
13 b.pcn,
14 rank() over (partition by a.field1 order by b.priority desc) rnk
15 from table1 a join table2 b on a.cust = b.cust
16 )
17 select field1,
18 pcn
19 from temp
20 where rnk = 1;
FIELD1 PCN
---------- ----------
1 20
2 30
SQL>
You may use first aggregate function to achieve the same (assuming that you have completely deterministic order by) functionality without nested subquery:
select
a.field1
, (
select max(b.pcn) keep(dense_rank first order by b.priority)
from table2 b
where b.cust = a.cust
) as pcn
from table1 a
which for this sample data
insert into table1 values(1,1);
insert into table1 values(2,2);
insert into table2 values(1,1,1);
insert into table2 values(2,2,1)
returns
FIELD1
PCN
1
1
2
(null)
SQL fiddle
I have a query like below (Query1)
SELECT COLUMN1,COLUMN2,COLUMN3 ,COLUMN4
FROM (SELECT COLUMN1,COLUMN2,COLUMN3,COLUMN4
FROM TABLE1 join TABLE3 ON JOINCONDITION
LEFT JOIN TABLE4 ON JOINCONDITION2
UNION ALL
SELECT COLUMN5,COLUMN2,COLUMN3,COLUMN6
FROM TABLE5 join TABLE3 ON JOINCONDITION
LEFT JOIN TABLE4 ON JOINCONDITION3
)
I have optimized the above query and derived the following query (Query2)
SELECT CASE CONDITION... COLUMN1,COLUMN2,COLUMN3,CASE CONDITION.. AS COLUMN4
FROM (SELECT COLUMN2,COLUMN3
FROM TABLE1
UNION ALL
SELECT COLUMN2,COLUMN3
FROM TABLE5 )
JOIN TABLE3 ON JOINCONDITION
LEFT JOIN TABLE4 ON JOINCONDITION2
LEFT JOIN TABLE5 ON JOINCONDITION3
COLUMN3 - DATE datatype
COLUMN2 - USERIDs
To validate the new query (Query2), I tried to execute both the queries with MINUS operator like below
QUERY3:
QUERY1 WHERE COLUMN2 BETWEEN 17150 AND 20000
MINUS
QUERY2 WHERE COLUMN2 BETWEEN 17150 AND 20000
This results in 5 rows with COLUMN2=17480. Then I tried
QUERY4:
QUERY2 WHERE COLUMN2 BETWEEN 17150 AND 20000
MINUS
QUERY1 WHERE COLUMN2 BETWEEN 17150 AND 20000
I get the same 5 rows with same values. All the columns are matching exactly between both QUERY3 and QUERY4. COLUMN3 also having same date & time values (From Year till seconds) between QUERY3 and QUERY4.
Then I tried giving the value directly like below. This query returns nothing
QUERY1
WHERE COLUMN2 =17480
MINUS
QUERY2
WHERE COLUMN2 =17480
Even if I interchange the position of QUERY1 and QUERY2 in between the MINUS operator, no results.
One more thing to note is, there is no results even if I reduce the range in the BETWEEN clause in QUERY3 and QUERY4.
Any ideas on this issue?
It seems that I haven't been clear enough.
The query that seems to work is:
Select ((Select count (table1.id) from table1 where table1.code=2 and table1.name=5) as ‘name5’,
(Select count (table1.id) from table1 where table1.code=2 and table1.name=7) as ‘name7’)
From table.1;
union
Select ((Select count (table1.id) from table1 where table1.code=5 and table1.name=5) as ‘name5’,
(Select count (table1.id) from table1 where table1.code=5 and table1.name=7) as ‘name7’)
From table.1;
union
Select ((Select count (table1.id) from table1 where table1.code=15 and table1.name=5) as ‘name5’,
(Select count (table1.id) from table1 where table1.code=15 and table1.name=7) as ‘name7’)
From table.1;
….
Which gets an outcome like this:
name5 name7
52 47
42 84
61 11
My problem is that the table1.code has a thousand and more values other than 2,5 and 15 and I can not repeat a union statement for so many times.
Well it seems like you actually just want to group by the values in the code column, and you can use IN or EXISTS
select count(table1.id) as theCount, table1.code as theCode
from table1 where table1.code in ('code a','code b', 'etc...')
group by table1.code;
the output would be
theCount||theCode
code a || 8074
code b || 34
etc... || 9575
or something like that but with non notional numbers for counts
HTH
You could try to list all values in a nested select listing integers from a to your value, e.g. 100, like that:
select count table1.id from table1 one where table1.code in (
select rownum from all_objects where rownum < 100
);
or if you don't want to start at "1":
select count table1.id from table1 one where table1.code in (
select rownum n from dual connect by level 10 where n>3
);
I have 2 tables
Table 1:
#######
ID Location
1 India
2 Australia
Table 2:
############
Name Locations
test1 India|North America
test2 Indiana|Australia
I used the below query to get the Name from table 2 if it contains Location in Locations of table 2.
select Name
from table2 t2 inner join table1 t1
on instr(t1.Location,t2.Locations,length(t1.Location)) >= 1;
But when executed it still gives me results for Indiana as well whereas it should just return me result for location India alone.
I tried using contains in query too, but contains takes second parameter as string but not as column name.
Is there any other approach on this?
regexps always help in such cases
with
table1 (id, location) as (
select 1, 'India' from dual union
select 2, 'Australia' from dual
),
table2 (name, locations) as (
select 'test1', 'India|North America' from dual union
select 'test2', 'Indiana|Australia' from dual
)
select *
from table2 join table1 on
regexp_like (locations, '(^|\|)' || location || '(\||$)')
Try to look up location with delimiter, like this:
select Name from table2 t2
inner join table1 t1 on instr(t2.Locations,t1.Location||'|') >= 1
I want to return data from duplicative rows
SELECT column1, column2 FROM table1
COLUMN1 COLUMN2
------- -------
CA 1
CB 2
CB 3
CC 4
CD 5
CE 6
CE 7
CE 8
CF 9
I want to return rows for 'CB' and CE. Here CB and CE has more than 1 row.
I'd code this as follows:
SELECT column1, column2 FROM table1 where column1 in ("CB", "CE")
Try this out - this query first finds out those items in column1 who appear multiple time and then extract their information.
select * from table1
where column1 in (
select column1
from table1
group by column1
having count(*) > 1
)
If you are only interested in knowing the values in column1, you could just run:
select column1
from table1
group by column1
having count(*) > 1
You Can try out this code. Basically the Query is in MySQL but you can use the same logic in Oracle Database. Here the inner subquery will find out the columns which is grouped by column1 and will return a column having a count greater than 1. The Outer query will display the rows of the column fetched by the inner query.Here I have created a table with the table name as name
SQL fiddle Added for your reference SQLCODE
select * from name where column1 in(select column1 from name
group by column1
having count(*)>1);