My first stored procedure (in sql-server). I'm not able to make it work, it raises a warning in a.Id
After reading, and not really understand much, I'm not even sure if I can use this inner join inside a stored procedure.
select top 1 b.*, a.*
FROM Bids b
INNER JOIN Auctions a
ON b.Auction_Id = a.Id
(NOLOCK) WHERE ( a.Ends IS NOT NULL AND a.Starts IS NOT NULL AND a.Starts < #Now AND a.Ends > #Now)
ORDER BY b.CreationTime DESC
Actually, I'll need just b.* but I assume I have to retrieve all the fields?.
Thanks
Change the locking hint to this:
INNER JOIN Auctions a WITH(NOLOCK)
Full query would be:
select top 1 b.*, a.*
FROM Bids b
JOIN Auctions a WITH(NOLOCK) ON b.Auction_Id = a.Id
WHERE ( a.Ends IS NOT NULL
AND a.Starts IS NOT NULL
AND a.Starts < #Now
AND a.Ends > #Now)
ORDER BY b.CreationTime DESC
Take the (Nolock) out, or put it after the table name if you need it.
You can use Select to select any fields you want from any table in your query.
Related
I have one source table in DB. I need to do group and sum to get one bridging table, extract supplier info on the other bridging table then join the two using part_number.
If I run the subqueries separately, T1 gives me 54699 records and T2 gives approx 10 times rows of T1.
Next, I do left join, I expect it should return 54699 records, but the server engine never stops and it returns 50 million records at the time I scroll down to the end. I have to stop the query manually. I realized there must something wrong with my query, but I can not figure it out. I would appreciate it if you have any ideas. Thank you!
SELECT
T1.*, T2.SUPPLIER
FROM
(SELECT
T.PART_NUMBER,T.YEAR, T.WEEK,
SUM(T.QTY_FILLED) TOTAL_FILLED,
SUM(T.QTY_ORDERED) TOTAL_ORDERED,
COUNT(T.LINE_NUMBER) ORDER_TIMES
FROM
DBO.TABLE1 T
WHERE
T.YEAR IS NOT NULL
GROUP BY
PART_NUMBER, T.YEAR, T.WEEK) T1
LEFT JOIN
(SELECT
T.PART_NUMBER, T.SUPPLIER
FROM
DBO.TABLE1 T) T2 ON T1.PART_NUMBER = T2.PART_NUMBER
ORDER BY
T1.PART_NUMBER, T1.YEAR, T1.WEEK
I also tried the window function, but still no luck.
WITH T1 AS
(
SELECT
T.PART_NUMBER,T.YEAR, T.WEEK,
SUM(T.QTY_FILLED) TOTAL_FILLED,
SUM(T.QTY_ORDERED) TOTAL_ORDERED,
COUNT(T.LINE_NUMBER) ORDER_TIMES
FROM
DBO.TABLE1 T
WHERE
T.YEAR IS NOT NULL
GROUP BY
PART_NUMBER, T.YEAR, T.WEEK
), T2 AS
(
SELECT T.PART_NUMBER, T.SUPPLIER
FROM DBO.TABLE1 T
)
SELECT
T1.*, T2.SUPPLIER
FROM
T1
LEFT JOIN
T2 ON T1.PART_NUMBER = T2.PART_NUMBER
ORDER BY
T1.PART_NUMBER, T1.YEAR, T1.WEEK
First of all, it not only return 54699 rows. You do a join without distinct, so the result could be the join of 50.000 x 5.000.000 rows and it depends on the value of your table.
If you use SQL 2017 or newer, try something like this:
SELECT
T.PART_NUMBER,T.YEAR, T.WEEK,
SUM(T.QTY_FILLED) TOTAL_FILLED,
SUM(T.QTY_ORDERED) TOTAL_ORDERED,
COUNT(T.LINE_NUMBER) ORDER_TIMES,
STRING_AGG (SUPPLIER, ', ') AS SUPPLIER
FROM
DBO.TABLE1 T
WHERE
T.YEAR IS NOT NULL
GROUP BY
PART_NUMBER, T.YEAR, T.WEEK
I am using a complex query. I need to returns me always a row even it doesnt find anything.
SELECT
a.InventoryItemID,
a.Name,
a.RetailPrice,
b.MainGroupItemCode,
b.MainGroupItemID,
c.VatValue,
a.Code,
a.Weight,
b.MainGroupItemName,
a.RetailPrice2,
a.FreePrice,
case when isnull(e.IsActive,0)=1 and isnull(d.price,0)!=0 then d.Price else RetailPrice End as CustomPrice
from InventoryMaster a
join InventoryMainGroupItems b on a.MainGroupItemID=b.MainGroupItemID
join VatCodes c on b.VatCodeID=c.VatCodeID
join InventoryPrices d on d.InventoryItemID=a.InventoryItemID
join InventoryCatalog e on e.CatalogID=d.CatalogID
where a.InventoryItemID=2 and ISNULL(e.catalogID,1)=3
The problem is in last line ISNULL(e.catalogID,1)=3. In my table it doesn't exist CatalogID with number 3.
So it doesnt returns me anything, but there is CatalogID with number 1. I have set that if is null to return me 1, Unfortunately i dont get any row back from my query. How can i fix this ?
My question has been solved i just want to add one more join table with one wheere condition isnide
SELECT *
from
(
SELECT t1.ID,
t1.Name,
COALESCE(t2.price,t1.Price) AS price ,
Row_number() OVER(partition BY t1.ID ORDER BY t1.ID) rn
FROM InventoryMaster t1
LEFT JOIN inventoryprices t2
ON t1.ID=t2.ID
LEFT join InventoryCatalog t3
ON t3.ID=t2.ID and t3.ID=2
where t1.ID=2
) t
WHERE t.rn=1
it returns me always the retailprice from First Table Inventory
Add 3 cols near beginning of the select
d.InventoryItemID,
d.CatalogID,
e.CatalogID
Then remove And ISNULL from the Where, and run to see what you get.
It may be that
join InventoryCatalog e
needs
ON d.CatalogID=ISNULL(e.catalogID,1)
I am using SQL Server 2012 and want to translate this into T-SQL code:
Get a set of IDs from some table. i.e.: select id from id_table where id > 3.
Use these IDs as input to another query, for example:
SELECT count(*) nb , [status]
FROM [tbl_dest] as dest with (nolock)
inner join [tbl_messages] as source with (nolock)
on dest.message_id=source.id
where source.id=338
I want to use the second query using the IDs that I got from the first query in the last where clause is where source.id=338 using a loop or a variable etc.
Can you please help with your knowledge?
One straightforward option here would be to use a WHERE IN clause:
SELECT
COUNT(*) nb,
[status]
FROM [tbl_dest] AS dest WITH (NOLOCK)
INNER JOIN [tbl_messages] AS source WITH (NOLOCK)
ON dest.message_id = source.id
WHERE source.id IN (SELECT id FROM id_table WHERE id > 3);
We can also rephrase the WHERE IN using another join:
SELECT
COUNT(*) nb,
[status]
FROM [tbl_dest] AS dest WITH (NOLOCK)
INNER JOIN [tbl_messages] AS source WITH (NOLOCK)
ON dest.message_id = source.id
INNER JOIN id_table it
ON source.id = it.id
WHERE it.id > 3;
Cursor is not required. Just try to use subquery;
SELECT count(*) nb , [status] FROM [tbl_dest] as dest with (nolock) inner join
[tbl_messages] as source with (nolock) on
dest.message_id=source.id where source.id IN (select id from id_table where id >3)
I have a SQL query that looks like this
Select a.*
From table1 a
where a.ColumnName in
(Select MAX(b.ColumnName)
from table2 b
where b.ColumnName2 in
(
Select MAX(c.columnName)
from table3 c
Group by c.ColumnName2
)
Group by b.ColumnName2
)
I am trying to write this in a join statement. I am positive inner join is what I need to get the right information. If someone could translate this to a join statement, I would be really glad.
Thank you.
EDIT 1:
I tried the typical Join statement that a rookie would.
Select a.*
from table1 a
inner join table2 b
on a.columnname = (Select max(b.columnName) from table2)
inner join table3 c
on b.columnName = (select max(c.columnName) from table3)
Obviously, that didn't work because I get 100,000+ results when I should be getting 800. I tried using an alias for table2 and table3 INSIDE the subselect statements and selecting the columnname using THAT alias like this:
Select max(bPart.columnName from table2 bPart)
Select max(cPart.columnName from table3 cPart)
Still the same result.
PERHAPS....
Though I'm not sure why a join is needed. Performance wise exists would likely be fastest, and since you're not returning values from table2 or 3 it seems like it would be the best approach.
SELECT a.*
FROM table1 a
INNER JOIN (SELECT MAX(ColumnName) MColumnName, columnname2
FROM table2
GROUP BY columnName2) B
ON A.columnName = B.mColumnName
INNER JOIN (SELECT MAX(columnName) mColumnName
FROM table3
GROUP BY ColumnName2) C
ON B.columname2 = C.MColumnName
I want to use left outer join like this:
SELECT ...
FROM Table1
LEFT OUTER JOIN
(SELECT only e.g. 3rd record... , SomeField FROM Table2) tbl2
ON Table1.SomeField = tbl2.SomeField
How can I do that, if I need the subquery to select not just the 3rd record from Table2, but the 3rd record among the Table2 records that have SomeField = Table1.SomeField?
Thanks.
If this is sql server 2005 or newer, you might use row_number():
LEFT JOIN
(
select *
from
(
select *,
row_number() over (order by something) rn
from Table2
where Table2.Column = Table1.Column
) a
where a.rn = 3
) a
Unfortunately you need to nest it a level deeper because you cannot use row_number in a condition directly.
EDIT:
My bad - i didn't really notice the join part. If you want to join derived table, use this:
LEFT JOIN
(
select *,
row_number() over (partition by SomeField order by something) rn
from Table2
) tbl2
ON Table1.SomeField = tbl2.SomeField
AND tbl2.rn = 3
Note: you need ORDER BY in row_number() to keep things consistent.