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I have a mapping table below and I want to check either ID exists in the corresponding Table or not. For example: check ID 001 in "xxabc" database table and return "Yes" if table has 001 ID present else "No".
ID TableName
--------------------------
001 xxabc
003 xxabc
004 xxpqr
009 xxghi
Try this:
SELECT S.[ID]
,CASE WHEN M.[ID] IS NULL THEN 'No' ELSE 'Yes' END
--,IIF(M.[ID] IS NULL, 'No', 'Yes') -- for SQL Server 2012+
FROM [source_table] S
LEFT JOIN [mapping_table] M
ON S.[ID] = M.[ID]
Related
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I have a problem with my query:
UPDATE [DIM_Category]
SET Category 3 = (SELECT AVG(Category 2)
FROM [DIM_Category] GROUP BY Category)
I want to do like in this exemple and I don't know how.
Category
Category 2
Category 3
OCS
10800
20350
OCS
29600
20350
Netflix
24000
23000
Netflix
22000
23000
As much as I dislike the concept you are doing here the query itself needs to be correlated. One way you can do that easily is with a cte. This will work on the example you posted. I included my code to create a table so I had something work with. You would obviously not need that part. ;)
create table DIM_Category
(
Category varchar(20)
, Category2 int
, Category3 int
);
insert DIM_Category
(
Category
, Category2
) values
('OCS', 10800)
,('OCS', 29600)
,('Netflix', 24000)
,('Netflix', 22000);
with CatAvg as
(
select Category
, CatAverage = AVG(Category2)
from DIM_Category
group by Category
)
update c
set Category3 = ca.CatAverage
from DIM_Category c
join CatAvg ca on ca.Category = c.Category;
select *
from DIM_Category;
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I have two tables in sqlite. Let's say table_1 and table_2. table_1 has two columns named(Barcode, Price) , similarly table_2 has two columns named(Barcodes, Price). I want to update table_1.Price. if table_1.Barcode is present in table_2. Barcodes, then take the price of table_2. Price otherwise keep it table_1.Price.
I hope I am very clear. Let me just write it down in a programmatic sense to be very clear.
if(table_1.Barcode == table_2.Barcodes)
table_1.Price = table_2.Price
else
table_1.Price = table_1.Price
I need sqlite query which does this. Is it possible?
If your version of SQLite is 3.33.0+ you can do it with UPDATE...FROM syntax:
UPDATE table_1 AS t1
SET Price = t2.Price
FROM table_2 t2
WHERE t2.Barcode = t1.Barcode;
For older versions of SQLite you need a corelated subquery which returns the price from table_2:
UPDATE table_1
SET Price = COALESCE(
(SELECT t2.Price FROM table_2 t2 WHERE t2.Barcode = table_1.Barcode),
Price
);
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I have the following table and need the following result with join based on username
Query
select
iif(count(*)>1, min(ID), max(right([User], 1))) ID,
[User],
iif(count(*)>1, concat('Total: (', cast(count(*) as varchar(12)), ')'), max(replace([Text], 'Text', 'Texto'))) [Text]
from
MyTable
group by
[User]
order by 1;
Results
ID User Text
1 User01 Total: (3)
2 User2 Texto 4
3 User3 Texto 5
6 User04 Total: (2)
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I have a table like this..
ID City
-----------------
1 Jakarta
1 Bogor
2 Bandung
2 Surabaya
3 Solo
3 Null
I want the query would returns:
ID City
---------------
1 Bogor
2 Surabaya
3 Null
Any ideas? I need your help.. I used some methods such as rank , distinct, max.. but the result is not what I expected..
You can use a CTE with the ROW_NUMBER-function:
WITH CTE AS
(
SELECT Id, City, Rn = ROW_NUMBER() OVER (Partition By ID
Order by Id DESC)
FROM dbo.Cities
)
SELECT Id, City
FROM CTE
WHERE RN = 1
Altough i don't know which column you want to use to determine the "latest" record. Use that in Order by Id DESC.
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I would like ask if this is possible in any database. Lets say there's one column on my database that has a content like this:
-----------------
|columname |
-----------------
| roan,joan,keith|
------------------
If I do a select query, can I just display roan from that field?
Thanks,
MSSQL version of Mark answer:
SELECT SUBSTRING(columnname, 1, CHARINDEX(',', columnname, 1) - 1) FROM testtable;
Oracle solution:
select substr(columnname,1,instr(columnname,',')-1) from testtable;