What would be the MS Access SQL to combine these two tables? Table1 has column A, B, and C. Table2 has A, D, and E. I want the final result to be A,B,C,D,E where (join) Table1 A equals Table2 A.
Union/UnionAll tells me the columns don't match. Insert into gives me a similar error. Thanks in advance for any help. (Sorry this is probably a noob question)
UNION is for combining data with equal columns, what you need is a JOIN
SELECT t1.A,B,C,D,E FROM table1 t1 JOIN table2 t2 ON t1.A = t2.A
select a.A,a.B,a.C,b.D,b.E from Table1 a, Table2 b where a.A==b.B;
This worked for me
SELECT Table1.*, Table2.*
FROM Table1 LEFT JOIN Table2 ON Table1.A=Table2.A;
I just tested this in MS Access 2003 and it worked:
SELECT t1.A, t1.B, t1.C, t2.D, t2.E
INTO Table3
FROM Table1 t1
LEFT JOIN Table2 t2
ON t1.A = t2.A
I got all data from table1 and table2 in my new table.
Related
I'm trying to lookup a value (c) from a table (Table2) and link it to a value (a) that I have in Table1. When I run the following lines I get an error "Unsupported subquery type cannot be evaluated". I don't know how to resolve it.
SELECT
a,
b,
(SELECT c FROM Table2 AS T2 WHERE T1.a = T2.a) AS c,
FROM Table1 AS T1;
I tried different subquery types but couldn't find the solution.
SELECT T1.a, T1.b, T2.c
FROM Table1 as T1
JOIN Table2 AS T2
ON T1.a = T2.a;
I have written the query:
Select distinct a,b from t1 minus Select distinct a,b from t2.
Here t1 and t2 are two tables. I want distinct values of a and b that occur in t1 but not in t2. So I'm using minus operator. I want values of both a and b but I know that in some cases the value of b in t1 and t2 maybe different. This would result in values of a and b that are present in both t1 and t2 as minus would not happen if values of b do not match in both the tables. How can I do this successfully?
How can I get values of a and b that are present in table t1 but not in table t2 even though in some cases values of b might not match in both the tables?
table1: table2:
column1 column2 column1 column2
1 a 1 c
2 b 3 d
In this case I would want values (2,b) only. I would not want (1,a) as 1 is also present in table2.
Start with not exists:
select distinct. . .
from t1
where not exists (select 1 from t2 where t2.a = t1.a and t2.b = t1.b);
From you describe, you might want the comparison only on a:
select distinct a, b
from t1
where not exists (select 1 from t2 where t2.a = t1.a);
Another option is to use sub query in the WHERE condition as below-
SELECT A.*
FROM table1 A
WHERE A.column1 NOT IN
(SELECT DISTINCT column1 FROM table2)
You can also use LEFT JOIN as below which will provide you the same output as below-
SELECT A.*
FROM table1 A
LEFT JOIN table2 B ON A.column1 = B.column1
WHERE B.column1 IS NULL
For the data not include in t2, you can either go for the NOT EXISTS or LEFT OUTER JOIN.
Here is the solution.
Using NOT EXISTS
SELECT DISTINCT A,B FROM T1 WHERE NOT EXISTS (SELECT 1 FROM T2 WHERE T2.A = T1.A AND T2.B = T1.B);
Using Left Join
SELECT DISTINCT a,b,c FROM T1 LEFT JOIN T2 ON T1.a = T2.a and T1.b = T2.b WHERE T2.a IS NULL AND T2.b IS NULL
Hope it helps.
I have two tables T1 and T2.
T1 having records like A,B,C,D
T2 having records like A,B,D,E
Now out of the query should be C when we compare both tables as C is not available in T2
Please help here..
In Oracle, you can use the minus set operator:
select t1.*
from t1
minus
select t2.*
from t2;
You should be able to just use an inner join, this will return everything that both tables have in common, so:
SELECT T1.* FROM T1 INNER JOIN T2 ON T1.id = T2.id
Another way of achieving this would be:
SELECT
C1
FROM
T1
WHERE
C1 NOT IN (
SELECT
C1
FROM
T2
);
I need a select that return the values from T2.C from rows which combination of T2.A and T2.B doesn't exist in T1.
Something like:
select C from T2 where A,B not in (select A,B from T1)
Results from example must be:
C
--
y
z
Do you mean like
SELECT T2.*
FROM T2
LEFT OUTER JOIN T1
ON T2.ColumnA = T1.ColumnA
AND T2.ColumnB = T1.ColumnB
WHERE T1.ColumnA IS NULL;
If you do an outer join, you can easily notice a lack of a match (via nulls).
I have 2 tables as follows T1 and T2.
T1 has one field as A and T2 has one field B.
Now i want to do following: for each value of T1.A I want to join with T2.B
Something like :
select * from T1 ,(select * from where T2 where T2.B = T1.A)
Is this correct? When i try this I get an error saying T1.A is invalid indentifier.
I know that i can do select * from T1,T2 where T1.A = T2.B
But my use case is very complex. The query (select * from where T2 where T2.B = T1.A) is very complex.
So how do I go ahead with this?
You just need to JOIN the tables:
select *
from T1
inner join T2
on T2.B = T1.A
If you need help learning JOIN syntax, here is a great visual explanation of joins.
I used an INNER JOIN which will return the rows that match between T1 and T2. You might need to use a LEFT JOIN which will return all rows in T1 even if there is not a matching row in T2
If you have another query to select from, then you can use a subquery:
select *
from T1
inner join
(
-- place your query here
select *
from T2
) T2
on T2.B = T1.A
If your subquery is only returning one column, then you could use:
select t1.*, (select t2.col1 from T2 t2 where t2.B = t1.A)
from T1 t1
Unless I'm mistaken, can't you just use JOIN:
select *
from t1
join t2 on t1.field = t2.field
Good luck.
You can do
select *
from T1
inner join T2
on T2.B = T1.A
as other people have said.
However, this "ON" version is preferred only for readability.
You can also go ahead an use
select * from T1,T2 where T1.A = T2.B
The optimizer will figure it out, and do the exact same thing,
as the queries are equivalent.
You can go ahead an use it, as there is nothing wrong with it.
select * from first_table inner join second_table on first_table.X = second_table.Y
select A,T1.B,(select * from where T2 where T2.B = T1.A) FROM T1 .Will this help?