I have two tables (Table1 and Table2) I am comparing. Each table has the same four columns: customerid, channeltreeid, producttreeid and consentstatusid. The customerid is what links each record in the tables, but there are cases where customerid is the same but there are different values in the other column. How can I find all such records (those where customerid is the same but at least one other column differs)?
I am enhancing the answer given by #TheImpaler to output ONLY the rows where there is a difference in one or more of the 3 last columns, as it is so I understand the requirements.
select
t1.customerid,
t1.channeltreeid, t1.producttreeid, t1.consentstatusid,
t2.channeltreeid, t2.producttreeid, t2.consentstatusid,
from table1 t1
join table2 t2 on t1.customerid = t2.customerid
where t1.channeltreeid <> t2.channeltreeid
or t1.producttreeid <> t2.producttreeid
or t1.consentstatusid <> t2.consentstatusid
A simple join will do:
select
t1.customerid,
t1.channeltreeid, t1.producttreeid, t1.consentstatusid,
t2.channeltreeid, t2.producttreeid, t2.consentstatusid,
from table1 t1
join table2 t2 on t1.customerid = t2.customerid
In any case, I really think this is a bad database modelling. You should revise and fix the model.
Related
I have two tables that has the same data. It is collected over two weeks. For example
In table 1 you have
IP|Zip|state
x.x.x.x|abcde|NJ
y.y.y.y|qwert|NY
z.z.z.z|werty|NH
In table 2 you have
IP|Zip|state
x.x.x.x|abcde|NJ
y.y.y.y|qwert|NY
m.m.m.m|werty|NH
z.z.z.z|merty|CA
I am looking to overlap these tables and compare of IP:Zip pairs and then count number of IPs changed zip by state of table 1. Thanks for the help!
You seem to want a join and aggregation:
select t1.state, count(t2.ip)
from table1 t1 left join
table2 t2
on t1.ip = t2.ip and t1.state = t2.state and t1.zip <> t2.zip
group by t1.state;
I am trying to write an SQL query that will return Table1, which has 10 columns. This table consists of a primary key id, 4 foreign key Id columns, and 5 other columns that I want to return but not change. The goal is to do a join to replace the foreign key Ids with their descriptions that are held in other tables.
Here is one attempt with the first FK Id:
Select * from Table1 t1
left join Table2 t2
on t1.BranchId = t2.BranchId;
This left join returns the description from table2, but does not replace it.
Here is another with the first FK Id:
Select t2.BranchName from Table1 t1
left join Table2 t2
on t1.BranchId = t2.BranchId;
This returns the name I want, but does not return table1 fully.
For the sake of an example you could pretend that OtherName3, OtherName4, OtherName5 are in tables Table3, Table4, Table5, respectively.
This may seem trivial for experienced SQL devs, but I am having a hard time figuring out the syntax.
Thanks!
I'm not sure what you mean by replace it.
I think you just need to list out all the columns you want:
Select t1.col1, t1.col2, t1.col3, . . .,
t2.name
from Table1 t1 left join
Table2 t2
on t1.BranchId = t2.BranchId;
I don't know what you mean by 'replace' but you just need to qualify what columns from which table you want. That goes for all tables you are joined to, especially if they have the same column name in multiple tables. I put junk columns in since I don't know your tables but you should get the general idea.
Select t2.BranchName, t1.BranchId, t1.Name, t1.Amount, t2.BranchLocation from Table1 t1
left join Table2 t2
on t1.BranchId = t2.BranchId;
I think this is what you are looking for:
select t1.*, t2.BranchName from Table1 t1
left join Table2 t2
on t1.BranchId = t2.BranchId;
Return Table1 fully (all columns) and only the description (BranchName) from Table2.
If using SQL Server, see all syntax options for the SELECT clause here:
https://msdn.microsoft.com/en-us/library/ms176104.aspx
select t1.key,t2.design,t1.price,t1.gender,t1.store
from table1 t1,table2 t2
where t1.key=t2.key;
This is my query. In this query, column KEY is distinct. I need result with distinct DESIGN values. Help me with this.
from table1 t1 join table2 t2 on t1.key = t2.key
where design like "specific design"
Your request is not precise. There are two things possible:
1) You are talking about duplicate records, i.e. for two records with the same design the columns key, price, gender and store are guaranteed to be equal. Two ways to solve it:
select DISTINCT t1.key,t2.design,t1.price,t1.gender,t1.store
from table1 t1,table2 t2
where t1.key=t2.key;
or
select t1.key,t2.design,t1.price,t1.gender,t1.store
from table1 t1, (select distinct key, design from table2) t2
where t1.key=t2.key;
2) You are talking of duplicate designs and ambigious information related, i.e. for two records for the same design you may get different prices etc. Then you must think about what information you want to get per design. The maximum price? The sum of prices? ...
select t1.key,t2.design,sum(t1.price),max(t1.gender),max(t1.store)
from table1 t1,table2 t2
where t1.key=t2.key
group by t1.key,t2.design;
This gives you records per key and design. If you want records per design only then you would group only by design and decide which key you want to show with it.
A last recommendation: Use explicit join syntax. It is easier to read and less error-prone.
select t1.key, t2.design, t1.price, t1.gender, t1.store
from table1 t1
inner join table2 t2 on t1.key = t2.key;
I am searching for a real scenario problem that I faced last night while joining two tables with foreign keys. Actually I want to get all values from second table on behalf of foreign key.
Here are my two tables let suppose:
table1 (id_user_history(PK),id_user(FK), order_no, p_quantity)
table2 (id_shoping_cart(PK), id_user(FK),order_id, prod_quantity)
Now I want to get all values from table2 by joining these tables with table1(id_user(Fk)) and table2( id_user(FK))
SELECT *
FROM table2 t2
LEFT JOIN
table1 t1
on t1.id_user = t2.id_user
all records from table 2 and only those record which match on table 1.
SQL is mainly set logic. Here's a link which helps visualize.
http://www.codinghorror.com/blog/2007/10/a-visual-explanation-of-sql-joins.html
Looks like a simple join fits the bill:
select *
from table1 t1
left join
table2 t2
on t1.id_user = t2.id_user
I am a little confused as to how to approach this SQL query.
I have two tables (equal number of records), and I would like to return a column with which is the division between the two.
In other words, here is my not-working-correctly query:
SELECT( (SELECT v FROM Table1) / (SELECT DotProduct FROM Table2) );
How would I do this? All I want it a column where each row equals the same row in Table1 divided by the same row in Table2. The resulting table should have the same number of rows, but I am getting something with a lot more rows than the original two tables.
I am at a complete loss. Any advice?
It sounds like you have some kind of key between the two tables. You need an Inner Join:
select t1.v / t2.DotProduct
from Table1 as t1
inner join Table2 as t2
on t1.ForeignKey = t2.PrimaryKey
Should work. Just make sure you watch out for division by zero errors.
You didn't specify the full table structure so I will assume a common ID column to link rows in the tables.
SELECT table1.v/table2.DotProduct
FROM Table1 INNER JOIN Table2
ON (Table1.ID=Table2.ID)
You need to do a JOIN on the tables and divide the columns you want.
SELECT (Table1.v / Table2.DotProduct) FROM Table1 JOIN Table2 ON something
You need to substitue something to tell SQL how to match up the rows:
Something like: Table1.id = Table2.id
In case your fileds are both integers you need to do this to avoid integer math:
select t1.v / (t2.DotProduct*1.00)
from Table1 as t1
inner join Table2 as t2
on t1.ForeignKey = t2.PrimaryKey
If you have multiple values in table2 relating to values in table1 you need to specify which to use -here I chose the largest one.
select t1.v / (max(t2.DotProduct)*1.00)
from Table1 as t1
inner join Table2 as t2
on t1.ForeignKey = t2.PrimaryKey
Group By t1.v