I have the following Table Data
I want to split column a into two columns like this:
Result Data
Person 00AB has given Paper1, Paper2, and Paper4.
What query will show in two columns which person has given the paper with 00AB.
You can try the following code:
select tableAB.a, tableP.a
from table as tableAB
inner join table as tableP on tableAB.b = tableP.b
where tableAB.a = '00AB'
and tableP.a != '00AB'
Related
Just to level set: i'm working within a Vertica database using SQL.
Let's say i have two tables: Table A and Table B. Let's also say that Table A is my final/master table used for data vis within Tableau (or something akin), and that Table B feeds certain columns into Table A based on matches within a tertiary table, Table C (which is not relevant to this conversation).
As is, Table A has columns:
ProgramName [varchar(50)]
CustomerName [varchar(50)]
Total_Cost [numeric(18,4)]
As is, Table B has columns:
CustomerCode [varchar(10)]
Total_Cost [numeric(18,4)]
What I would like to do is update Table A's CustomerName column to equal CustomerCode in Table B where the columns of total_cost_dollars equal each other across tables.
I've run this left join query to ensure that, when I do update Table A's CustomerName to equal CustomerCode, the total cost columns are exact/true matches for my entire data set.
SELECT
A.ProgramName,
A.CustomerName,
A.total_cost_dollars,
B.CustomerCode,
B.total_cost_dollars
FROM
TableA A
LEFT JOIN
TableB B
ON
B.total_cost_dollars = A.total_cost_dollars
WHERE
A.CustomerName IS NULL;
Any idea on how to solve this problem?
Since Vertica supports merge query, you can use merge statement:
merge into TableA A
using TableB B
ON (B.total_cost_dollars = A.total_cost_dollars)
when matched then
update
set
A.CustomerName = B.CustomerCode
where
A.CustomerName IS NULL;
I'm trying to create a summarised result set joining two tables.
The first table (main and multi row) contains say the following columns:
trans_id,
trans_type_id
The second table (one row only) contains:
from_trans_type_id,
to_trans_type_id
I'm trying to join the two tables so that from_trans_type_id = trans_type_id and to_trans_type_id = trans_type_id and get the relevant trans_id values
I've tried self joining and derived joins to no effect.
The end result is that I'm looking to get a result set that looks something like this:
trans_id as from_trans_id, from_trans_type_id, trans_id as to_trans_id, to_trans_type_id
data is:
you can use join with multiple instance of firsttable
select b.trans_id as from_trans_id, from_trans_type_id, c.trans_id as to_trans_id, to_trans_type_id
from secondtable a
inner join firsttable b on a.from_trans_type_id=b.trans_type_id
inner join firsttable c on a.to_trans_type_id=c.trans_type_id
I have 2 tables with 1 column in common. I want to select all data from table1 and want to restrict it with a condition. The thing I could not do is writing the where condition with the non-common column.
Here is the code:
$sql="SELECT kategoriler.adi as katadi, urunler.* FROM `urunler`
LEFT JOIN `kategoriler`
ON urunler.kategori_id=kategoriler.Id
WHERE urunler.kategori_id=$id
OR
kategoriler.ust_id = $id";
ust_id is a parent column of kategori_id and kategoriler.Id. I want to select the child values of it.
(Btw as you can see the common columns are urunler.kategori_id and kategoriler.Id)
I have 3 columns in table A. I am trying to design a query that will call out all the values (in the three columns) that do not apepar in the 1 column I have in table B. If it helps to make it more clear, table B is a list of currencies in ISO codes and table A is three columns of currencies being used, I am identifying all those values that are NOT using ISO codes to denote their currency.
Currently, I can't seem to get them all to match to the one column, so I made 2 more columns in table B so I can match them individually. My constraints are, I cannot change table A and I must do this in one query. What I got so far is below.
SELECT m.Currency1, i.ISO_Code, m.Currency2 , i.ISO_Code1, m.Currency3, i.ISO_Code2
FROM A AS m
LEFT JOIN B AS i
ON m.Currency=i.ISO_Code
AND m.Currency2=i.ISO_Code1
AND m.Currency3=i.ISO_Code2
WHERE i.ISO_Code is NULL
OR i.ISO_Code1 is NULL
OR i.ISO_Code2 is NULL;
I wouldn't bother making multiple columns in 'B'. I played with this in SQLFiddle and got it to work.
Something like this:
SELECT
m.Currency1, i.ISO_Code,
m.Currency2, j.ISO_Code AS ISO_Code1,
m.Currency3, k.ISO_Code AS ISO_Code2
FROM A AS m
LEFT JOIN B as i
ON m.Currency1 = i.ISO_Code
LEFT JOIN B as j
ON m.Currency2 = j.ISO_Code
LEFT JOIN B as k
ON m.Currency3 = k.ISO_Code
WHERE
i.ISO_Code IS NULL OR
j.ISO_Code IS NULL OR
k.ISO_Code IS NULL
I have a little problem - since im not very experienced in SQL - about joining the same table on multiple values. Imagine there is table 1 (called Strings):
id value
1 value1
2 value2
and then there is table 2 (called Maps):
id name description
1 1 2
so name is reference into the Strings table, as is description. Without the second field referencing the Strings table it would be no problem, id just do an inner join on Strings.id = Maps.name. But now id like to obtain the actual string also for description. What would be the best approach for a SELECT that returns me both? Right now it looks like this:
SELECT Maps.id, Strings.value AS mapName FROM Maps INNER JOIN Strings ON Strings.id = Maps.name;
But that obviously only covers one of the localized names. Thank you in advance.
You can do this with two joins to the same table:
SELECT m.id, sname.value AS mapName, sdesc.value as description
FROM Maps m INNER JOIN
Strings sname
ON sname.id = m.name INNER JOIN
Strings desc
ON sdesc.id = m.description;
Note the use of table aliases to distinguish between the two tables.
As long as you want to get a single value from another table, you can use subqueries to do these lookups:
SELECT id,
(SELECT value FROM Strings WHERE id = Maps.name) AS name,
(SELECT value FROM Strings WHERE id = Maps.description) AS description
FROM Maps