I need to join two tables in SQL. There are no common fields. But the one table have a field with the value krin1001 and I need it to be joined with the row in the other table where the value is 1001.
The idea behind the joining is i have multiple customers, but in the one table there customer id is 'krin1001' 'krin1002' and so on, in this table is how much they have sold. In the other table there customer is is '1001' '1002' and so on, and in this table is there name and adress and so on. So it will always be the first 4 charakters i need to strip from the field before matching and joining. It might not always be 'krin' i need it to work with 'khjo1001' also, and it still needs to join on the '1001' value from the other table.
Is that possible?
Hope you can help me.
You need to use substring:
ON SUBSTRING(TableA.Field, 5, 4) = TableB.Field
Or Right:
ON RIGHT(TableA.Field, 4) = TableB.Field
You can also try to use CHARINDEX function for join operation. If value from table1 contains value from table2 row will be included in result set.
;WITH table1 AS(
SELECT 'krin1001' AS val
UNION ALL
SELECT 'xxx'
UNION ALL
SELECT 'xyz123'
),
table2 AS(
SELECT '1001' AS val
UNION ALL
SELECT '12345'
UNION ALL
SELECT '123'
)
SELECT * FROM table1 AS t
JOIN table2 AS T2 ON CHARINDEX(T2.val, T.val) > 0
Use it as:
SELECT
*
FROM table t1
INNER JOIN table t2 ON RIGHT(t1.col1, 4) = t2.col1;
Related
I have 2 sql table as follows:
First table t1:
Second table t2:
I need to calculate the count of "Number" column based on "Name" column from t1 and merge it with t2.
I wrote following code. But it seems not working
select *
from (
select Name, count(Number) as count
from t1
group by Name ) as a
join ( select *
from t2 ) as b
on a.Name = b.Name;
Can any one figure out what is wrong ? Thank you very much
I think you want to use SUM() instead of COUNT().
Because SUM() sums some integers, while COUNT() counts number of occurencies.
And as also stated in the comments, multiple columns with same names will create conflicts, so you have to select the wanted columns explicit (that is usually a good idea anyway).
You could obtain your wanted endgoal by this query:
select
SUM(Number),
t1.Name,
(select val1 FROM t2 WHERE t2.Name = t1.Name LIMIT 1) as val1
FROM t1
GROUP BY t1.Name
Example in sqlfiddle: http://sqlfiddle.com/#!9/04dddf/7
I am joining two tables by the regNo column. I want to add the points of Table1.points and Table2.points where the regNo matches and just incase it doesn't match I also want it be included with its points in the list as shown in the image bellow
I have read through the existing problems but not finding the solution to this e.g How can I sum columns across multiple tables in MySQL?
(
SELECT `Ex`.regNo,(`In`.`points`+`Ex`.`points`) AS 'Points'
FROM Table1`In`
LEFT JOIN Table2`Ex` ON `In`.`regNo` = `In`.`regNo`
)
UNION
(
SELECT`Ex`.regNo,(`In`.`points`+`Ex`.`points`) AS 'Points'
FROM Table1`In`
RIGHT JOIN Table2`Ex` ON `In`.`regNo` = `In`.`regNo`
);
I want it to give the list arranged as per unique (DISTINCT) regNo
You need UNION followed by GRoUP BY:
SELECT regNo, SUM(points) AS total
FROM (
SELECT regNo, points
FROM Table1
UNION ALL
SELECT regNo, points
FROM Table2
) AS u
GROUP BY regNo
You are looking for a FULL JOIN between both tables.
SELECT
COALESCE(t1.id, t2.id) id
COALESCE(t1.regNo, t2.regNo) regNo
COALESCE(t1.points, 0) + COALESCE(t2.points 0) points
FROM
table1 t1
FULL JOIN table2 t2 on t1.regNo = t2.regNo
NB : you did not specify what you expect to be done to generate the new id so by default the above query will display the table1.id if available, else table2.id.
If you would better generate a new, auto-incremented field, then :
SET #i=0;
SELECT
#i:=#i+1 id
COALESCE(t1.regNo, t2.regNo) regNo
COALESCE(t1.points, 0) + COALESCE(t2.points 0) points
FROM
table1 t1
FULL JOIN table2 t2 on t1.regNo = t2.regNo
Please check this. You need to use full outer join and null replacement before aggregation
select
COALESCE(table1.regno, table2.regno) regno,
sum(COALESCE(table1.points,0)) + sum(COALESCE(table2.points,0)) points
from Table1
full outer join Table2
on table1.regno = table2.regno
group by
COALESCE(table1.regno, table2.regno)
I have a database with 2 tables. table1 and table2.
Table1 contains a list of tests ( column 'name' ). And I want to count how many rows are missing in table2 ( this table has also a column 'name' ) according to the list of tests of table1.
So I just want to count the mismatch between table1.name and table2.name.
I tried several querys, but all didnt really work.
I tried to use the 'NOT IN' statement but it takes too much time. Like several minutes.
For example, the output should be :
COUNT(*) = 20
It means that 20 tests are missing ( or not done yet ) in table2.
I'm using MySQL, so I can't use EXCEPT or MINUS statement.
Thank you by advance.
Nordine
You can use not exists :
select count(*)
from table1 t1
where not exists (select 1 from table2 t2 where t2.name = t1.name);
If you have a duplicate name in table1 then you need count(distinct t1.name) instead.
Try the below query:
select count(case when bname is null then 1 end)
from
(
select a.name as aname, b.name as bname from
table1 a left join table2 b
on a.name=b.name)x
MINUS can be used in MySQL.
Ref:http://www.mysqltutorial.org/mysql-minus/
Try this:
SELECT name
FROM table1
MINUS
SELECT name
FROM table2
I'm desperate with this query. I have two tables table1 and table2, tables are identical but they have different data. I'm trying to remove duplicities by columns code and manufacturer. To do that I need in final result ID from table1 ID from table2 and also columns code and manufacturer
SELECT * FROM (
SELECT id,code,manufacturer FROM table1 WHERE manufacturer = 1
UNION SELECT id,code,manufacturer FROM table2 WHERE manufacturer = 1
) AS t GROUP BY code HAVING COUNT(*) > 1
But in result i got only values from table1. It's OK but I just need to get there id from table2 too. Please can anyone give me some tips how to do this ?
You have two basic problems:
Problem 1:
You are using UNION when you should be using UNION ALL, because UNION removes duplicates!
Problem 2:
This isn't the right way to go about the problem. You should be using a simple join, not a union.
Try this:
SELECT
t1.id as table1_id,
t2.id as table2_id,
t1.code,
t1.manufacturer
FROM table1 t1
JOIN table2 t2
ON t2.code = t1.code
AND t2.manufacturer = t1.manufacturer
WHERE manufacturer = 1 -- this WHERE clause is optional
Your use of the WHERE clause is a little odd - consider removing it to get all duplicates from all manufacturers.
I have two tables a and b which has a field name in it.
I need to list the data from these two tables. I thought of using union but in the result list data from the first table appears and then followed by the second.
what i want is to order by the field name so the result should be a mixed up of two tables in the order of name that is order by name.
select slug, name, 1 as mt
from tablea
union
select slug, name, 0 as mt
from tableb
order
by name;
The above is working well for me. will there be any complications in the result of this?
Suppose your query is
SELECT field1 FROM TABLE1 WHERE 1
UNION SELECT field1 FROM TABLE2 WHERE 1
u can make it a subquery like this
SELECT * FROM (SELECT field1 FROM TABLE1 WHERE 1
UNION SELECT field1 FROM TABLE2 WHERE 1) AS `result` ORDER BY `result`.`field1`
Or, you could use a Join query such as:
SELECT tablea.firstname, tablea.middlename, tablea.lastname, tableb.phone
FROM tablea, tableb
WHERE tablea.ID = tableb.ID
Then, you could sort the result however you like.