I have two tables, DATA_TABLE and ERROR_TABLE. DATA_TABLE has a column ID with an 8 digit number. ERROR_TABLE has a column KEY with idkey= followed by eight digits.
I can't use an intersect because the tuples are different and I don't know how to work around it.
What I need is to find the rows in DATA_TABLE that have a value in the ID column that corresponds to a value in the ERROR_TABLE in the KEY column.
Here's a visual. I need to see which of these match and and display those rows from the DATA_TABLE
DATA_TABLE
ID
24294857
19573859
49205983
ERROR_TABLE
KEY
idkey=24294857
idkey=66849896
idkey=94697356
i would use a simple inner join
select *
from DATA_TABLE
inner join ERROR_COLUMN
on DATA_TABLE.ID = ERROR_TABLE.KEY
select dt.*
from data_table dt
join error_table et
on et.idkey = dt.id
Similar to PM 77-1, but using an explicit join:
SELECT *
FROM DATA_TABLE
JOIN ERROR_TABLE
ON 'idkey=' || ID = KEY;
See: http://sqlfiddle.com/#!4/dbe73/3
Do you mean something like this?
SELECT * FROM DATA_TABLE d, ERROR_TABLE e
WHERE ('idkey='||d.id = e.key)
ORDER BY DATA_TABLE.id
Best thing to do is correct your data in Error Table. These examples will cut the text leaving digits only. You may explicitly convert them to number with TO_NUMBER() function to join and compare. You already have plenty join examples. But before joining you need to convert both sides to number cutting off the characters in front of numbers:
-- This example assumes you will always have '=' in your string --
SELECT SUBSTR('idkey=24294857', INSTR('idkey=24294857', '=')+1) digits_only
FROM dual
/
SELECT regexp_replace('idkey=24294857','[^0-9]') digits_only
FROM dual;
/
SELECT REGEXP_SUBSTR('idkey=24294857','[[:digit:]]+') AS digits_only FROM dual
/
After this your query will compare number to number in join, which is the only right thing to do.
Thanks for the help everyone!
I tried every suggestion, but couldn't get any to work. I'm really green with SQL and only understand a few commands.
Finally, I got this from a colleague and it accomplished what I need. Now, I just need to understand it...
SELECT *
FROM DATA_TABLE
WHERE EXISTS
(SELECT NULL
FROM ERROR_TABLE
WHERE ID = SUBSTR(ERROR_TABLE.KEY,7));
Related
SELECT
ID, PRIM_EMAIL, SEC_EMAIL, PHONE
FROM
STUDENTS.RECORDS
WHERE
ID IN (SELECT ID FROM STUDENTS.INFO WHERE ROLL_NO = '554')
UNION
SELECT NAME
FROM STUDENTS.INFO
WHERE ROLL_NO = '554';
Here Roll_No is a user inserted data so for now I have hard coded it. Basically with the help of ROLL_NO I sort the STUDENTS_INFO table from where I get the ID and based on that I try to get PRIM_EMAIL, SEC_EMAIL, PHONE from the STUDENTS.RECORDS table while matching the foreign keys of both the tables. In addition to the current result set I also want to have the prov_name column.
Any help is very much appreciated. Thank you!
I suspect that you want to put all this information on the same row, which suggests a join rather than union all:
select
r.ID,
r.PRIM_EMAIL,
r.SEC_EMAIL,
r.PHONE,
r.NAME
from STUDENTS.RECORDS r
inner join STUDENTS.INFO i ON i.ID = r.ID
where I.ROLL_NO = '554';
I think the source of your error query block has incorrect number of result columns is coming from trying to union together a table with 4 columns (id, prim_email, sec_email, phone) with 1 column (name).
From your question, I am gathering that you want a single table of id, prim_email, sec_email, phone from students.records and name from students.info.
I think the following query using CTE's might get you (partially) to your final result. You may want to refactor for optimizing performance.
with s_records as ( select * from students.records ),
s_info as ( select * from students.info ),
joined as (
select
s_records.id,
s_records.prim_email,
s_records.sec_email,
s_records.phone,
s_info.name
from s_records
left join s_info
on s_records.roll_no = s_info.roll_no
where roll_np = '554' )
select * from joined
Overall, I think that a join will be part of your solution rather than a union :-)
I'm not sure how to write a join clause that takes a value from table 1, then searches a string in table 2 to see if they match. Sound confusing?
Here's the actual example I'm working with.
Table 1
Customer_Id Concat_Phone_Numbers
1 8888888888;1111111111
Table 2
Caller Callee Calldate
1111111111 3333333333 1/1/1900
I want to create a table that looks like this:
Desired Table
Customer_Id Calldate
1 1/1/1900
I'm lost when it comes to writing the join clause so that the entire list in Table 1's second column is searched for a matching phone number/entry.
Thank you in advance for your help! (PS it's my first time asking a question!)
Edit::
Here's where I'm at now
Select
*
from table1
left join table2
on ??????????????????
Yuck! You should fix the data structure. You really need a table with one row per customer and per phone number. You'll understand why if you care about performance.
But, if you are stuck with this data model, you can do a join using string and/or array operations. Here is a method using regular expressions
select . . .
from table1 t1 left join
table2 t2
on t2.caller ~ '^' || replace(t1.phone_numbers, ';', '|') || '$' or
t2.callee ~ '^' || replace(t1.phone_numbers, ';', '|') || '$' ;
I've been playing around with the sample on Jeff' Server blog to compare two tables to find the differences.
In my case the tables are a backup and the current data. I can get what I want with this SQL statement (simplified by removing most of the columns). I can then see the rows from each table that don't have an exact match and I can see from which table they come.
SELECT
MIN(TableName) as TableName
,[strCustomer]
,[strAddress1]
,[strCity]
,[strPostalCode]
FROM
(SELECT
'Old' as TableName
,[JAS001].[dbo].[AR_CustomerAddresses].[strCustomer]
,[JAS001].[dbo].[AR_CustomerAddresses].[strAddress1]
,[JAS001].[dbo].[AR_CustomerAddresses].[strCity]
,[JAS001].[dbo].[AR_CustomerAddresses].[strPostalCode]
FROM
[JAS001].[dbo].[AR_CustomerAddresses]
UNION ALL
SELECT
'New' as TableName
,[JAS001new].[dbo].[AR_CustomerAddresses].[strCustomer]
,[JAS001new].[dbo].[AR_CustomerAddresses].[strAddress1]
,[JAS001new].[dbo].[AR_CustomerAddresses].[strCity]
,[JAS001new].[dbo].[AR_CustomerAddresses].[strPostalCode]
FROM
[JAS001new].[dbo].[AR_CustomerAddresses]) tmp
GROUP BY
[strCustomer]
,[strAddress1]
,[strCity]
,[strPostalCode]
HAVING
COUNT(*) = 1
This Stack Overflow Answer gives me a much cleaner SQL query but does not tell me from which table the rows come.
SELECT * FROM [JAS001new].[dbo].[AR_CustomerAddresses]
UNION
SELECT * FROM [JAS001].[dbo].[AR_CustomerAddresses]
EXCEPT
SELECT * FROM [JAS001new].[dbo].[AR_CustomerAddresses]
INTERSECT
SELECT * FROM [JAS001].[dbo].[AR_CustomerAddresses]
I could use the first version but I have many tables that I need to compare and I think that there has to be an easy way to add the source table column to the second query. I've tried several things and googled to no avail. I suspect that maybe I'm just not searching for the correct thing since I'm sure it's been answered before.
Maybe I'm going down the wrong trail and there is a better way to compare the databases?
Could you use the following setup to accomplish your goal?
SELECT 'New not in Old' Descriptor, *
FROM
(
SELECT * FROM [JAS001new].[dbo].[AR_CustomerAddresses]
EXCEPT
SELECT * FROM [JAS001].[dbo].[AR_CustomerAddresses]
) a
UNION
SELECT 'Old not in New' Descriptor, *
FROM
(
SELECT * FROM [JAS001].[dbo].[AR_CustomerAddresses]
EXCEPT
SELECT * FROM [JAS001new].[dbo].[AR_CustomerAddresses]
) b
You can't add the table name there because union, except, and intersection all compare all columns. This means you can't differentiate between them by adding the table name to the query. A group by gives you control over what columns are considered in finding duplicates so you can exclude the table name.
To help you with the large number of tables you need to compare you could write a sql query off the metadata tables that hold table names and columns and generate the sql commands dynamically off those values.
Derive one column using table names like below
SELECT MIN(TableName) as TableName
,[strCustomer]
,[strAddress1]
,[strCity]
,[strPostalCode]
,table_name_came
FROM
(SELECT 'Old' as TableName
,[JAS001].[dbo].[AR_CustomerAddresses].[strCustomer]
,[JAS001].[dbo].[AR_CustomerAddresses].[strAddress1]
,[JAS001].[dbo].[AR_CustomerAddresses].[strCity]
,[JAS001].[dbo].[AR_CustomerAddresses].[strPostalCode]
,'[JAS001].[dbo].[AR_CustomerAddresses]' as table_name_came
FROM [JAS001].[dbo].[AR_CustomerAddresses]
UNION ALL
SELECT 'New' as TableName
,[JAS001new].[dbo].[AR_CustomerAddresses].[strCustomer]
,[JAS001new].[dbo].[AR_CustomerAddresses].[strAddress1]
,[JAS001new].[dbo].[AR_CustomerAddresses].[strCity]
,[JAS001new].[dbo].[AR_CustomerAddresses].[strPostalCode]
,'[JAS001new].[dbo].[AR_CustomerAddresses]' as table_name_came
FROM [JAS001new].[dbo].[AR_CustomerAddresses]
) tmp
GROUP BY [strCustomer]
,[strAddress1]
,[strCity]
,[strPostalCode]
,table_name_came
HAVING COUNT(*) = 1
I need to make a query but get the value in every field empty. Gordon Linoff give me the clue to this need here:
SQL Empty query results
which is:
select t.*
from (select 1 as val
) v left outer join
table t
on 1 = 0;
This query wors perfectly on PostgreSQL but gets an error when trying to execute it in Microsoft Access, it says that 1 = 0 expression is not admitted. How could it be fixed to work on microsoft access?
Regards,
If the table has a numeric primary key column whose values are non-negative then the following query will work in Access. The primary key field is [ID].
SELECT t2.*
FROM
myTable AS t2
RIGHT JOIN
(
SELECT TOP 1 (ID * -1) AS badID
FROM myTable AS t1
) AS rowStubs
ON t2.ID = rowStubs.badID
This was tested with Access 2010.
I am offering this answer here, even though you didn't think it worked in my edit to your original question. What is the problem?
select t.*
from (select max(col) as maxval from table as t
) as v left join
table as t
on v.val < t.col;
You can use the following query, but it would still need a little "manual coding".
EDITS:
Actually, you do not need the SWITCH function. Modified query below.
Removed the reference to Description column from one line. Still, you would need to use a Text column name (such as Description) in the last line of the query.
For example, the following query would work for the Months table:
select Months.*
from Months
RIGHT OUTER JOIN
(select "" as DummyColumn from Months) Blank_Data
ON Months.Description = Blank_Data.DummyColumn; --hardcoded Description column
I'd like to achieve something as follows, I have the following query (As simple as this),
SELECT ENT_ID,TP_ID FROM TC_LOGS WHERE ENT_ID IN (1,2,3,4,5).
Now the table TC_LOGS may not have all the items in the IN clause. So assuming that the table TC_LOGS has only 1,2. I'd like to compare the items in the IN clause i.e. 1,2,3,4,5 with 1,2(the resultset) and get a result as FOUND - 1,2 NOT FOUND - 3,4,5. I've have implemented this by applying an XSL transformation on the resultset in the application code, but I'd like to achieve this in a query, which I feel is more of an elegant solution to this problem. Also, I tried the following query with NVL, just to separate out the FOUND and NOT FOUND items as,
SELECT NVL(ENT_ID,"NOT FOUND") FROM TC_LOGS WHERE ENT_ID IN(1,2,3,4,5)
I was expecting a result as 1,2,NOT FOUND,NOT FOUND,NOT FOUND
But the above query doesn't return any result.. I'd appreciate if someone can guide me in the right path here.. Thanks much in advance.
Assuming that the items in your IN list can (or can come) from another query, you can do something like
WITH src AS (
SELECT level id
FROM dual
CONNECT BY level <= 5)
SELECT nvl(ent_id, 'Not Found' )
FROM src
LEFT OUTER JOIN tc_logs ON (src.id = tc_logs.ent_id)
In my case, the src query is just generating the numbers 1 through 5. You could just as easily fetch that data from a different table, load the numbers into a collection that you query using the TABLE operator, load the numbers into a temporary table that you query, etc. depending on how the IN list data is determined.
NVL isn't going to work because no values (including NULLS) are returned when there is no match with the IN statement.
What you can do is something like this:
SELECT NVL(ENT_ID, "NOT FOUND")
FROM TC_LOGS
RIGHT OUTER JOIN (
SELECT 1 AS 'TempID' UNION
SELECT 2 UNION
SELECT 3 UNION
SELECT 4 UNION
SELECT 5) AS Sub ON ENT_ID = TempID
The outer join will return NULLS for ENT_ID where there are no matches. Note, I'm not an Oracle person so I can't guarantee that this syntax is perfect.
if you have a table (let's use table src )contains all (1,2,3,4,5) values, you can use full join.
You can use (WITH src AS ( SELECT level id FROM dual CONNECT BY level <= 5) as the src table also)
SELECT
ent_id,tl.tp_id,src.tp_id
FROM
src
FULL JOIN
tc_logs tl
USING (ent_id)
ORDER BY
ent_id
Here is the web site for oracle full join.http://psoug.org/snippet/Oracle-PL-SQL-ANSI-Joins-FULL-JOIN_738.htm