I have a table Alpha
A
B
C
2
4
3
1
5
1
4
3
null
I have a reference of table like BETA of one column
like
a
1
2
3
4
5
I want to copy the data missing in Alpha with respect to Beta to another table Gamma such that
The expected result is as follows
A
B
C
3
1
2
5
2
4
null
null
5
It has to refer to the beta table as it is not always in order,
eg. beta table can be 2,3,5 and alpha table has 2 and 3 so the missing value is just 5
PS: this is a minimal representation, in real there are more than 20 columns in Alpha but only one column in beta
The table Alpha and expected result table are same
I have to put my crystal ball into overdrive.
I think you wanted to generate the missing value for each column in table Alpha based on the list of value in table `Beta'
What the below query doing is find out the missing value for each column (A, B, C). After that PIVOT it
; with missing as
(
select col = 'A', V = A
from Beta b
where not exists (select * from Alpha a where a.A = b.A)
union all
select col = 'B', V = A
from Beta b
where not exists (select * from Alpha a where a.B = b.A)
union all
select col = 'C', V = A
from Beta b
where not exists (select * from Alpha a where a.C = b.A)
)
select [A], [B], [C]
from (
select *, rn = row_number() over (partition by col order by V)
from missing
) m
pivot
(
max(V)
for col in ([A], [B], [C])
) p
PS : if you really have 50 columns in table Alpha, you need to do the union all query 50 times, each for one of the column.
I think you can use several insert statement for this problem
INSERT GAMMA(A)
SELECT BETA.a FROM BETA
LEFT JOIN ALPHA ON BETA.a = ALPHA.A
WHERE ALPHA.A IS NULL
Change the A to B or another column name.
But this table will produce table like this
A
B
C
3
null
null
5
null
null
null
1
null
null
2
null
null
null
2
null
null
4
This might not be the answer you want, but i hope it gives you alternatives.
Related
Here is what my initial dataset looks like
prof_id id title
1 5 A
1 5 B
1 5 C
1 5 D
2 5 C
2 5 D
2 5 E
NA 5 F
NA 5 G
Here is what the new table should look like:
prof_id id title
1 5 A
1 5 B
1 5 C
1 5 D
1 5 F
1 5 G
2 5 C
2 5 D
2 5 E
2 5 F
2 5 G
Any row with a null value for a prof_id should be attributed to all of the prof_id. I have provided an example where there are two '
prof_id but there are also instances where there are 1 or 0 prof_id.
For 1, all of the null should be attributed to that single prof_id
For 0, leave it as is
I'm new to SQL so I'm not sure how to start. Any guidance would be much appreciated.
Thanks
In this case, you will need to do cross join, where essentially it is going to multiply 2 tables together.
First to pick out all nulls:
select id, title from table where prof_id is null
Then pick out the prof_id you want to apply to all tables
select distinct prof_id from table where prof_is is not null
Do a cross join together, then union the rest of "good" data back
(select distinct prof_id from table where prof_is is not null)
CROSS JOIN
(select id, title from table where prof_id is null)
UNION ALL
(select prof_id, id, title from table where prof_id is not null)
You can generate all the rows using a cross join. Then use union all to combine this with the rest of the data.
The following syntax should work:
select p.prof_id, i.id, t.title
from (select distinct prof_id
from t
where prof_id <> 'NA' -- or do you mean is not null
) p cross join
(select distinct id from t) i cross join
(select distinct title
from t
where prof_id = 'NA' -- or is null
) t
union all
select prof_id, id, title
from t
where prof_id <> 'NA' -- or is not null
For every row in table Y, I need a copy of the current row in Table X, taking field 1 from Table Y.
Table X
Field 1 Field 2
null A
null B
null C
Table Y
Field 1
1
2
3
Desired output
Field 1 Field 2
1 A
1 B
1 C
2 A
2 B
2 C
3 A
3 B
3 C
Looks like a cross join:
select y.field1, x.field2
from x cross join
y;
Looks like an unconditional select of both tables without matching ids
Something like
select tableY.column1, tableX.column2
from tableY, tableX
order by tableY.column1 asc, tableX.column2 asc
should do it.
BTW. Was this a school question, because then I should not have answered this.
Try this query:
SELECT #Tabley.Field1 , #TableX.Field2
FROM #TableX ,#Tabley
How can I merge data into one column for different account numbers. Currently, it looks like this.
TableA.Order TableA.Question TableB.Response
1 a Null
1 b James
1 c Null
2 d Zebra
2 T Null
However, I want it to merge like below:
TableA.Order NewColumn
1 a
1 b
1 c
1 James
2 d
2 T
2 Zebra
Base from my understanding of your question. I devised a solution which answers to it. See my query below:
SELECT * FROM TableA
UNION ALL
SELECT B.Order1,A.Response From
(
(SELECT ROW_NUMBER()OVER(ORDER BY Response)PK,* FROM TableB) A Left Join
(SELECT ROW_NUMBER()OVER(ORDER BY Order1)PK,* FROM TableA) B On A.PK=B.PK
)
Where Response IS NOT NULL
I have the following tables in a Hive database:
table1:
id t X
1 1 a
1 4 a
2 5 a
3 10 a
table2:
id t Y
1 3 b
2 6 b
2 8 b
3 15 b
And I would like to merge them to have a table like:
id t Z
1 1 a
1 3 b
1 4 a
2 5 a
2 6 b
2 8 b
3 10 a
3 15 b
Basically what I want to do is :
a join on the column id (that part is easy)
merge the columns table1.t and table2.t into a new column t
have the variable Z that is equal to table1.X if the corresponding t comes from table1.t, and table2.Y if it comes from table2.t
order the table by id and then by t (that shouldn't be too hard)
I have no idea on how to do the parts 2 and 3. I tried with an outer join on
table1.id = table2.id and table1.t = table2.t, but it doesn't merge the two columns t.
Any pointer would be appreciated. Thanks!
CREATE TABLE table3 as SELECT * FROM (SELECT id,t,X as Z FROM t3_1 UNION ALL SELECT id,t,Y as Z FROM t3_2) u1 order by id,t;
Although not always required, using a subquery for the union'd queries help to organize, plus you can then reference the fields from the union (e.g. u1.id ) in other parts of the query.
You'll need the alias on the 3rd column to make the schemas match. If the source table name was not already a column, you could do something like this:
select * from (select id,t,'a' from t3_1 UNION ALL select id,t,'b' from t3_2) u1;
Try this one. It will insert in table 3, all the values from the other 2 tables
INSERT INTO table3 ( t, Z )
SELECT t, X
FROM table1
UNION ALL
SELECT t, Y
FROM table2
I have this table:
id type otherid
1 4 1234
2 5 1234
3 4 4321
As you can see there are 3 records, 2 of them belongs to otherid "1234" and got type of 4 and 5.
Last record belongs to otherid of "4321" and has only a type of 4.
I need to select all otherid that got only the type 4 and not the type5.
Example: after this select on that table the query shuould return only the record 3
Thanks
add1:
Please consider the TYPE can be any number from 1 up to 20.
I only need otherid that got type 4 but not type 5 ( except than that they can have any other type )
add2:
using mysql 5.1
This is kind of a workaround
SELECT * FROM (
SELECT GROUP_CONCAT('|',type,'|') type,other_id FROM table GROUP BY otherid
) t WHERE type LIKE '%|4|%' AND type NOT LIKE '%|5|%'
You could use a not exists subquery:
select distinct otherid
from YourTable as yt1
where yt1.type = 4
and not exists
(
select *
from YourTable as yt2
where yt1.otherid = yt2.otherid
and yt1.type <> yt2.type -- use this line for any difference
and yt2.type = 5 -- or this line to just exclude 5
)
Another way is by using a left join from where you exclude rows that have both type 4 and 5:
select a.*
from table1 a
left join table1 b on b.otherid = a.otherid and b.type = 5
where a.type = 4 and b.id is null