I have two tables shown below. I want to create a new variable (VALUE) based on the logic below and show results in a 3rd table? How can I do this in T SQL?
TABLE_1
ID, DATE
TABLE_2
ID, DATE1, DATE2
Logic to set VALUE:
FOR ALL TABLE_1.ID
IF TABLE_1.DATE IS BETWEEN TABLE_2.DATE1 AND TABLE_2.DATE2
THEN VALUE = 1
ELSE VALUE = 0
IF TABLE_1.ID NOT IN TABLE_2
THEN VALUE = NULL
If you want to see the results for all rows where table_1.id = table_2.id (and table_1 rows that do not have a match on id), then we can use a left join and a case expression:
select
t.id
, t.date
, IsBetween = case
when t.date between t2.Date1 and t2.Date2
then 1
when t2.id is null
then null
else 0
end
, t2.*
from table_1 as t
left join table_2 as t2
on t.id = t2.id
If you only want one row for each row in table_1, and want to know if table_1.data is between any corresponding row in table_2 or not, then we can use a outer apply to select top 1 and a case expression:
select
t.id
, t.date
, IsBetween = case
when t.date between x.Date1 and x.Date2
then 1
when x.id is null
then null
else 0
end
from table_1 t
outer apply (
select top 1 t2.*
from table_2 t2
order by case
when t.date between t2.Date1 and t2.Date2
then 0
else 1
end
) as x
Related
I am trying to get the max date by account from 3 different tables and view those dates side by side. I created a separate query for each table, merged the results with UNION ALL, and then wrapped all that in a PIVOT.
The first 2 sections in the link/pic below show what I have been able to accomplish and the 3rd section is what I would like to do.
Query results by step
How can I get the results from 2 of the tables to repeat? Is that possible?
--define var_ent_type = 'ACOM'
--define var_ent_id = '52766'
--define var_dict_id = 113
SELECT
*
FROM
(
SELECT
E.ENTITY_TYPE,
E.ENTITY_ID,
'PERF_SUMMARY' as "TableName",
PS.DICTIONARY_ID,
to_char(MAX(PS.END_EFFECTIVE_DATE), 'YYYY-MM-DD') as "MaxDate"
FROM
RULESDBO.ENTITY E
INNER JOIN PERFORMDBO.PERF_SUMMARY PS ON (PS.ENTITY_ID = E.ENTITY_ID)
WHERE
1=1
-- AND E.ENTITY_TYPE = '&var_ent_type'
-- AND E.ENTITY_ID = '&var_ent_id'
AND PS.DICTIONARY_ID >= 100
AND (E.ACTIVE_STATUS <> 'N' )--and E.TERMINATION_DATE is null )
GROUP BY
E.ENTITY_TYPE,
E.ENTITY_ID,
'PERF_SUMMARY',
PS.DICTIONARY_ID
union all
SELECT
E.ENTITY_TYPE,
E.ENTITY_ID,
'POSITION' as "TableName",
0 as DICTIONARY_ID,
to_char(MAX(H.EFFECTIVE_DATE), 'YYYY-MM-DD') as "MaxDate"
FROM
RULESDBO.ENTITY E
INNER JOIN HOLDINGDBO.POSITION H ON (H.ENTITY_ID = E.ENTITY_ID)
WHERE
1=1
-- AND E.ENTITY_TYPE = '&var_ent_type'
-- AND E.ENTITY_ID = '&var_ent_id'
AND (E.ACTIVE_STATUS <> 'N' )--and E.TERMINATION_DATE is null )
GROUP BY
E.ENTITY_TYPE,
E.ENTITY_ID,
'POSITION',
1
union all
SELECT
E.ENTITY_TYPE,
E.ENTITY_ID,
'CASH_ACTIVITY' as "TableName",
0 as DICTIONARY_ID,
to_char(MAX(C.EFFECTIVE_DATE), 'YYYY-MM-DD') as "MaxDate"
FROM
RULESDBO.ENTITY E
INNER JOIN CASHDBO.CASH_ACTIVITY C ON (C.ENTITY_ID = E.ENTITY_ID)
WHERE
1=1
-- AND E.ENTITY_TYPE = '&var_ent_type'
-- AND E.ENTITY_ID = '&var_ent_id'
AND (E.ACTIVE_STATUS <> 'N' )--and E.TERMINATION_DATE is null )
GROUP BY
E.ENTITY_TYPE,
E.ENTITY_ID,
'CASH_ACTIVITY',
1
--ORDER BY
-- 2,3, 4
)
PIVOT
(
MAX("MaxDate")
FOR "TableName"
IN ('CASH_ACTIVITY', 'PERF_SUMMARY','POSITION')
)
Everything is possible. You only need a window function to make the value repeat across rows w/o data.
--Assuming current query is QC
With QC as (
...
)
select code, account, grouping,
--cash,
first_value(cash) over (partition by code, account order by grouping asc rows unbounded preceding) as cash_repeat,
perf,
--pos,
first_value(pos) over (partition by code, account order by grouping asc rows unbounded preceding) as pos_repeat
from QC
;
See first_value() help here: https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/FIRST_VALUE.html#GUID-D454EC3F-370C-4C64-9B11-33FCB10D95EC
Name Value AnotherColumn
-----------
Pump 1 8000.0 Something1
Pump 1 10000.0 Something2
Pump 1 10000.0 Something3
Pump 2 3043 Something4
Pump 2 4594 Something5
Pump 2 6165 Something6
My table looks something like this. I would like to know how to select max value for each pump.
select a.name, value from out_pumptable as a,
(select name, max(value) as value from out_pumptable where group by posnumber)g where and g.value = value
this code does the job, but i get two entries of Pump 1 since it has two entries with same value.
select name, max(value)
from out_pumptable
group by name
select name, value
from( select name, value, ROW_NUMBER() OVER(PARTITION BY name ORDER BY value desc) as rn
from out_pumptable ) as a
where rn = 1
SELECT
b.name,
MAX(b.value) as MaxValue,
MAX(b.Anothercolumn) as AnotherColumn
FROM out_pumptabl
INNER JOIN (SELECT
name,
MAX(value) as MaxValue
FROM out_pumptabl
GROUP BY Name) a ON
a.name = b.name AND a.maxValue = b.value
GROUP BY b.Name
Note this would be far easier if you had a primary key. Here is an Example
SELECT * FROM out_pumptabl c
WHERE PK in
(SELECT
MAX(PK) as MaxPK
FROM out_pumptabl b
INNER JOIN (SELECT
name,
MAX(value) as MaxValue
FROM out_pumptabl
GROUP BY Name) a ON
a.name = b.name AND a.maxValue = b.value)
select Name, Value, AnotherColumn
from out_pumptable
where Value =
(
select Max(Value)
from out_pumptable as f where f.Name=out_pumptable.Name
)
group by Name, Value, AnotherColumn
Try like this, It works.
select * from (select * from table order by value desc limit 999999999) v group by v.name
Using analytic function is the easy way to find max value of every group.
Documentation : https://learn.microsoft.com/en-us/sql/t-sql/functions/row-number-transact-sql?view=sql-server-ver15
Select name,
value,
AnotherColumn
From(
SELECT Row_Number() over(partition by name order by value desc)as
row_number, *
FROM students
)
Where row_number = 1
SELECT t1.name, t1.Value, t1.AnotherColumn
FROM mytable t1
JOIN (SELECT name AS nameMax, MAX(Value) as valueMax
FROM mytable
GROUP BY name) AS t2
ON t2.nameMax = t1.name AND t2.valueMax = t1.Value
WHERE 1 OR <anything you would like>
GROUP BY t1.name;
SELECT DISTINCT (t1.ProdId), t1.Quantity FROM Dummy t1 INNER JOIN
(SELECT ProdId, MAX(Quantity) as MaxQuantity FROM Dummy GROUP BY ProdId) t2
ON t1.ProdId = t2.ProdId
AND t1.Quantity = t2.MaxQuantity
ORDER BY t1.ProdId
this will give you the idea.
Below sample query is a part of my main query. I found SORT operator in below query is consuming 30% of the cost.
To avoid SORT, there is need of creation of Indexes. Is there any other way to optimize this code.
SELECT TOP 1 CONVERT( DATE, T_Date) AS T_Date
FROM TableA
WHERE ID = r.ID
AND Status = 3
AND TableA_ID >ISNULL((
SELECT TOP 1 TableA_ID
FROM TableA
WHERE ID = r.ID
AND Status <> 3
ORDER BY T_Date DESC
), 0)
ORDER BY T_Date ASC
Looks like you can use not exists rather than the sorts. I think you'll probably get a better performance boost by use a CTE or derived table instead of the a scalar subquery.
select *
from r ... left outer join
(
select ID, min(t_date) as min_date from TableA t1
where status = 3 and not exists (
select 1 from TableA t2
where t2.ID = t1.ID
and t2.status <> 3 and t2.t_date > t1.t_date
)
group by ID
) as md on md.ID = r.ID ...
or
select *
from r ... left outer join
(
select t1.ID, min(t1.t_date) as min_date
from TableA t1 left outer join TableA t2
on t2.ID = t1.ID and t2.status <> 3
where t1.status = 3 and t1.t_date < t2.t_date
group by t1.ID
having count(t2.ID) = 0
) as md on md.ID = r.ID ...
It also appears that you're relying on an identity column but it's not clear what those values mean. I'm basically ignoring it and using the date column instead.
Try this:
SELECT TOP 1 CONVERT( DATE, T_Date) AS T_Date
FROM TableA a1
LEFT JOIN (
SELECT ID, MAX(TableA_ID) AS MaxAID
FROM TableA
WHERE Status <> 3
GROUP BY ID
) a2 ON a2.ID = a1.ID AND a1.TableA_ID > coalesce(a2.MAXAID,0)
WHERE a1.ID = r.ID AND a1.Status = 3
ORDER BY T_Date ASC
The use of TOP 1 in combination with the unexplained r alias concern me. There's almost certainly a MUCH better way to get this data into your results that doesn't involve doing this in a sub query (unless this is for an APPLY operation).
I am trying to some sql code that combines information from 2 tables and uses case but it is not returning all the data.
SELECT TABLE1.PRODUCT, TABLE1.TYPE, TABLE1.AMOUNT,
(CASE
WHEN TABLE1.PRODUCT = 'RADIO'
THEN 100
ELSE 200
END) AS PRODUCT_CODE,
(CASE
WHEN TABLE1.TYPE = 'NEW'
THEN 'Y'
ELSE TABLE2.AGE
END) AS STATUS
FROM TABLE1 LEFT JOIN TABLE 2 ON TABLE1.TID = TABLE2.TID
WHERE TABLE1.DATE > '01-AUG-15'
AND TABLE2.DATE = '02-AUG-15'
The problem I am having is that I need all records from table1 and those that apply from table2 but when the query is returning less rows than there are in table 1.
Your problem is here
AND TABLE2.DATE = '02-AUG-15'
If Table2.Date is null due to the left join, this condition fails, which is why you are getting less rows than Table1. Adding a condition to the where clause from a left joined table is effectively turning it into an inner join.
Try either
AND (TABLE2.DATE = '02-AUG-15' OR TABLE2.DATE IS NULL)
(this assumes that TABLE2.DATE is not nullable) or put the condition in the join statement instead
FROM TABLE1 LEFT JOIN TABLE 2 ON TABLE1.TID = TABLE2.TID AND TABLE2.DATE = '02-AUG-15'
I'm trying to select all records from a table "Table1" but I want a new column called "HasException" that contains a "0" or a "1". "HasException" must be "0" if the count of row matching the current Id from "Table2" is equal to 0, else it returns 1.
Here's what I've done so far, but it doesn't works:
SELECT *,
CONVERT(bit, (CASE WHEN (SELECT count(Id) FROM Table2 WHERE Table1.Id=Table2.Id) = 0 THEN 0 ELSE 1 END)) AS HasException
FROM Table1
You want to join the tables (and group on ID) before you can compare the two values like this:
SELECT dbo.Table_1.*,
CASE WHEN COUNT(dbo.Table_2.ID) = 0 THEN
0
ELSE
1
END
AS HasException
FROM dbo.Table_1 LEFT OUTER JOIN
dbo.Table_2 ON dbo.Table_1.ID = dbo.Table_2.ID
GROUP BY dbo.Table_1.ID
perhaps something like, assuming you meant table2?
SELECT *,
CAST(CASE WHEN COUNT(table2.id) = 0 THEN 0 ELSE 1 END AS bit) AS HasException
FROM
Table1
LEFT JOIN
Table2 ON Table1.Id=Table2.Id
GROUP BY
Table1.id
select
T1.*,
case when T2.Id is null then 0 else 1 end as HasException
from Table1 as T1
left outer join
(
select distinct Id
from Table2
) as T2
on T1.Id = T2.Id