I am having a SQL Query which is having join with the View.
View Consist of two table simple join.
So i replaced the view with join to the base table join.
Earlier Query Was
SELECT DISTINCT sts.st_id,md.MarketId,fc.ct_desc MarketName
INTO #tempReviewMarketIds
FROM #MarketIds md
JOIN [dbo].[table1] fc ON md.MarketId = fc.ct_id
JOIN [dbo].[viewname] sts ON fc.ct_pkey = sts.ct_pkey
Structure Of View:
create view viewname as
select s.st_id, c.ct_pkey from
table1 c
join table2 a on c.ct_pkey = a.ae_ctpkey
join table3 s on a.ae_pkey = s.st_aepkey;
Final Query :
SELECT DISTINCT s.st_id,md.MarketId,fc.ct_desc MarketName
FROM #MarketIds md
JOIN [dbo].[table1] fc ON md.marketid = fc.ct_id
JOIN table2 a ON fc.ct_pkey = a.ae_ctpkey
JOIN table3 s ON a.ae_pkey = s.st_aepkey;
Earlier That query cost was 80% but now the query cost increased to 86%.
I am putting values in the temp table.Mainly Insert option increases in %age.
I have learned that join with view always slows the query and more I/O,O/P.
Can anyone tell me the reason?
Related
I'm trying to write a query where I want all the items in table1 that are in table2 which meets the first inner join criteria below (this is work find).
Then I want to check table3 to if there are exceptions. Exceptions are base on reference numbers (REF_NO). If the reference number exist in table3 then I need to check if the store number (STORE_NO) matches. If they match then I want the matching record from table1. If not then exclude the matching record from table1.
However, if there reference number DOES NOT exist in table3 then I want the record from table1 that match with table2.
Thanks
USE master
GO
table1
table2
table3
SELECT
T1.TERMINAL,
T1.OPERATOR,
T1.TRANS_NO,
T1.SEQ_NO,
T1.STORE_NO,
T2.REF_NO,
T2.SDATE,
T2.EDATE,
T1.POS_DATE,
T1.ITEM,
T1.ITYPE,
T1.SOLD_QTY,
T1.PRICE,
T2.OI_AMT
FROM [table1] As T1
INNER JOIN [table2] As T2
ON (T1.ITEM = T2.ITEM) And (T1.POS_DATE BETWEEN T2.SDATE And T2.EDATE)
INNER JOIN [table3] As T3
ON (T2.REF_NO = T3.REF_NO) And (T1.STORE_NO = T3.STORE)
SELECT
T1.TERMINAL,
T1.OPERATOR,
T1.TRANS_NO,
T1.SEQ_NO,
T1.STORE_NO,
T2.REF_NO,
T2.SDATE,
T2.EDATE,
T1.POS_DATE,
T1.ITEM,
T1.ITYPE,
T1.SOLD_QTY,
T1.PRICE,
T2.OI_AMT
FROM [table1] As T1
INNER JOIN [table2] As T2
ON T1.ITEM = T2.ITEM
AND T1.POS_DATE > T2.SDATE
AND T1.POS_DATE <= T2.EDATE
WHERE EXISTS ( SELECT TOP (1) 1
FROM table3 as T31
WHERE T2.REF_NO = T31.REF_NO
AND T1.STORE_NO = T31.STORE)
OR NOT EXISTS ( SELECT TOP (1) 1
FROM table3 as T32
WHERE T2.REF_NO = T32.REF_NO)
This should work, it checks both of your conditions. I also would encourage you not to use BETWEEN clause and specify date ranges using two conditions.
I got two tables as below
table 1 :Which got multiple columns which refers to a value in the second table.
tbale2:Lookup table where it got a row for every possible value for the columns in the above table
What I want to do is lookup the values in columns ItemID,ORDIG,CatID,MediaID in table 1 from ValueID in table2 and return ValueName
so at the end my result should look like
ItemID OrgID CatID MediaID
i859049 Singapore Full 0001edf
You will need to join to the lookup table once for each value you need, but should likely need to use a LEFT instead of INNER join since the values may be null.
SELECT
T1.ItemId,
Items.ValueName AS ItemName,
T1.OrgID,
Orgs.ValueName AS OrgName,
T1.CatID,
Cats.ValueName AS CatName,
T1.MediaID,
Media.ValueName AS MediaName
FROM Table1 T1
LEFT OUTER JOIN Table2 Items
ON T1.ItemId = Items.ValueID
LEFT OUTER JOIN Table2 Orgs
ON T1.OrgId = Orgs.ValueID
LEFT OUTER JOIN Table2 Cats
ON T1.CatId = Cats.ValueID
LEFT OUTER JOIN Table2 Media
ON T1.MediaId = Media.ValueID
CREATE PROCEDURE spJoin3Tables
AS
BEGIN
SELECT
tbl_Jobs.JobTitle, tbl_Company.CompName
FROM
tbl_Jobs
INNER JOIN
tbl_Company ON tbl_Jobs.CompID = tbl_Company.ID
SELECT
tbl_Cities.CityName
FROM
tbl_Cities
INNER JOIN
tbl_JobCities ON tbl_Cities.ID = tbl_JobCities.CityID
INNER JOIN
tbl_Jobs ON tbl_JobCities.JobID = tbl_Jobs.ID
END
The result is two tables. I want to get all three columns in one table - what will be the query?
You just need to add the company table and the columns from the first query to the second query and make sure to join on the company id.
SELECT
tbl_Cities.CityName, tbl_Jobs.JobTitle, tbl_Company.CompName
FROM
tbl_Cities
INNER JOIN
tbl_JobCities ON tbl_Cities.ID = tbl_JobCities.CityID
INNER JOIN
tbl_Jobs ON tbl_JobCities.JobID = tbl_Jobs.ID
INNER JOIN
tbl_Company ON tbl_Jobs.CompID = tbl_Company.ID
USING INNER JOIN U CAN GET ALL DATE. IF IN CASE ANY TABLE IN ID COLUMNS NULL VALUE THEN USER LEFT JOIN
SELECT tbl_Jobs.JobTitle, tbl_Company.CompName , tbl_Cities.CityName
FROM tbl_Jobs
INNER JOIN tbl_Company ON tbl_Jobs.CompID = tbl_Company.ID
INNER JOIN tbl_JobCities ON tbl_JobCities.JobID = tbl_Jobs.ID
INNER JOIN tbl_Cities ON tbl_Cities.ID = tbl_JobCities.CityID
I have three tables
table1 -> xt1, yt1, zt1;
table2 -> xt2
table3 -> yt3, zt3
SELECT xt1, yt1, zt1
From table1, table3
Where xt1
NOT IN
(SELECT DISTINCT table1.xt1 FROM table2 INNER JOIN table1 ON
table1.xt1 = Replace(table2.xt2,',',''))
And table1.yt1 = table3.yt3
AND table1.zt1 = table3.zt3
it is working correctly but i take long time.
if i replace NOT IN with Not exists it return empty set.
SELECT xt1, yt1, zt1
From table1, table3
Where Not exists
(SELECT DISTINCT table1.xt1 FROM table2 INNER JOIN table1 ON
table1.xt1 = Replace(table2.xt2,',',''))
And table1.yt1 = table3.yt3
AND table1.zt1 = table3.zt3
the results of the second select should be 6 rows but it returns notiong with not exists.
also if i tried to change the compare part to
table1.xt1 != Replace(table2.xt2,',','') and remove the NOT IN
select it get outof memory error.
So is this the best way to write my query and why it return empty set with Not exists
thank you.
Ok, first of all, I changed your implicit join to an explicit one. Then I fixed the NOT EXISTS so it correlates to the outer table1:
SELECT t1.xt1, t1.yt1, t1.zt1
FROM table1 AS t1
INNER JOIN table3 AS t3
ON t1.yt1 = t3.yt3
AND t1.zt1 = t3.zt3
WHERE NOT EXISTS ( SELECT 1
FROM table2 AS t2
INNER JOIN table1 AS t1_1
ON t1_1.xt1 = REPLACE(t2.xt2,',','')
AND t1_1.xt1 = t1.xt1) ;
which can be simplified further to:
SELECT t1.xt1, t1.yt1, t1.zt1
FROM table1 AS t1
INNER JOIN table3 AS t3
ON t1.yt1 = t3.yt3
AND t1.zt1 = t3.zt3
WHERE NOT EXISTS ( SELECT 1
FROM table2 AS t2
WHERE t1.xt1 = REPLACE(t2.xt2,',','')
) ;
You need to select IN or exist depending upon the size of inner query. when there is a outer query and inner-sub-query, if the result of sub query is small, In is preferred as outer query is selected based upon result of sub-query.
if the result of sub-query is large, exist is preferred as outer query is evaluated first.
I have two tables and did an inner join on them based on id. Now I need to name this joined table. How do I do that? The reason I want to name this table is because I have to join this result table with some other tables.
You created what is commonly referred t as a relvar, not another table. You can join to it by placing it's SELECT definition in a sub query like this:
SELECT
FROM (
-- original join SQL
) t
INNER JOIN table2 on ...
You can create an alias for the result of a join using a subquery. For example:
select *
from (
select *
from tbl1
join tbl2
on tbl1.id = tbl2.id
) as JoinAlias
join tbl3
on JoinAlias.id = tbl3.id
You can often make do without such an alias. For example, consider a third join:
select *
from tbl1
join tbl2
on tbl1.id = tbl2.id
join tbl3
on tbl3.col1 = tbl1.col1
and tbl3.col2 = tbl2.col2
As you can see, the third join's condition can refer to columns from all earlier tables.
select * from (
select * from TableA a join TableB b on a.id = b.a_id
) as p;
As per the comments, it seems that a view might be what you are looking for:
create view MyView
as
select * from TableA a join TableB b on a.id = b.a_id;
It won't be listed in the tables (rather in the views), but will behave just like a table in your sql editor.