Good afternoon,
I am still quite a novice with VBA but am trying to create a loop that will be able to sift through a long list of data within a given column (in my case, both tables have one common identifier, the system ID) and if a system ID is matched in one column with a column from the other table, then a new sheet is created that combines all of the rows associated with both sets of data into one row.
For example, if my data looked like this:
Table 1
Column A, Column B, Column C |
ID, Name, Birthday
Table 2
Column A, Column B, Column C|
Purchase, Amount, ID
And I had the same ID in both Tables 1 and 2, for each match, I would like to have all rows associated with the match joined together.
This would really enable me to speed things up with organizing information, so I was not sure if it would be possible... Any Ideas are welcome!
since excel is not a database program like access, you can not use sql-like joins natively. you would have to program your own join function:
(Since i do not have MS Office installed, i can only give you pseudo-code)
for each-loop going through IDs of Table1
for each-loop going through IDs of Table2
if(Table1.ID = Table2.ID) then
copy data of Table1 into a new sheet
copy data of Table2 into the same sheet, next to Table1 data
PS: i assume you use excel because of the vocabulary (column, worksheet,..)
Related
Prolog:
I have two tables in two different databases, one is an updated version of the other. For example we could imagine that one year ago I duplicated table 1 in the new db (say, table 2), and from then I started working on table 2 never updating table 1.
I would like to compare the two tables, to get the differences that have grown in this period of time (the tables has preserved the structure, so that comparison has meaning)
My way of proceeding was to create a third table, in which I would like to copy both table 1 and table 2, and then count the number of repetitions of every entry.
In my opinion, this, added to a new attribute that specifies for every entry the table where he cames from would do the job.
Problem:
Copying the two tables into the third table I get the (obvious) error to have two duplicate key values in a unique or primary key costraint.
How could I bypass the error or how could do the same job better? Any idea is appreciated
Something like this should do what you want if A and B have the same structure, otherwise just select and rename the columns you want to confront....
SELECT
*
FROM
B
WHERE NOT EXISTS (SELECT * FROM A)
if NOT EXISTS doesn't work in your DBMS you could also use a left outer join comparing the rows columns values.
SELECT
A.*
from
A left outer join B
on A.col = B.col and ....
I am trying to replicate a VLOOKUP I have done in Excel in SSMS. I have two tables - table 1 is an application master listing, table 2 is an application listing. I want to simply verify that every column in table 1 has an identical match in table two. I also want to have my results populate with an inserted column, column B with the results.
I have already done a very straight forward VLOOKUP in Excel with a 1:1 match. I now have Col A with the application master listing names, and then the new lookup column B with the 1:1 match.
Does anyone know how to go about this in SQL?
I want to update numerical columns of one table based on matching string columns from another table.i.e.,
I have a table (let's say table1) with 100 records containing 5 string (or text) columns and 10 numerical columns. Now I have another table that has the same structure (columns) and 20 records. In this, few records contain updated data of table1 i.e., numerical columns values are updated for these records and rest are new (both text and numerical columns).
I want to update numerical columns for records with the same text columns (in table1) and insert new data from table2 into table1 where text columns are also new.
I thought of taking an intersect of these two tables and then update but couldn't figure out the logic as how can I update the numerical columns.
Note: I don't have any primary or unique key columns.
Please help here.
Thanks in advance.
The simplest solution would be to use two separate queries, such as:
UPDATE b
SET b.[NumericColumn] = a.[NumericColumn],
etc...
FROM [dbo].[SourceTable] a
JOIN [dbo].[DestinationTable] b
ON a.[StringColumn1] = b.[StringColumn1]
AND a.[StringColumn2] = b.[StringColumn2] etc...
INSERT INTO [dbo].[DestinationTable] (
[NumericColumn],
[StringColumn1],
[StringColumn2],
etc...
)
SELECT a.[NumericColumn],
a.[StringColumn1],
a.[StringColumn2],
etc...
FROM [dbo].[SourceTable] a
LEFT JOIN [dbo].[DestinationTable] b
ON a.[StringColumn1] = b.[StringColumn1]
AND a.[StringColumn2] = b.[StringColumn2] etc...
WHERE b.[NumericColumn] IS NULL
--assumes that [NumericColumn] is non-nullable.
--If there are no non-nullable columns then you
--will have to structure your query differently
This will be effective if you are working with a small dataset that does not change very frequently and you are not worried about high contention.
There are still a number of issues with this approach - most notably what happens if either the source or destination table is accessed and/or modified while the update statement is running. Some of these issues can be worked around other ways but so much depends on the context of how the tables are used that it is difficult to provide a more effective generically-applicable solution.
Okay, so let's say I have two tables in Excel. I want to create a third table that looks up data from the other two and combines them. I'll explain what I mean
Here is my first table:
It has a number, which is like a primary key, and a corresponding name for each entry.
I also have a second table:
This one just contains some random info, and there's numerous entries. The Client Name is not listed here, but it does have the key for the client that each entry corresponds to.
I want to create a third table that shows me all the Client Info data, but replaces the key with the actual client name. So basically, wherever it sees a key of "1", it'll look that up from the first table and find "Comet" instead.
The desired table would look like this:
What kind of formula would I need to pull data from one table based on a value? Note that all my tables are in different worksheets.
Assuming that the three tables are in Sheet1, Sheet2, Sheet3, this is the formula you need in Sheet3, cell A2
=vlookup(Sheet2!A2,Sheet1!$A2$b$6,2,false)
Copy down as many rows as there are rows in Sheet2
If you need the client info from Sheet2, use this in Sheet3, cell B2 and copy down
=sheet2!B2
As you put an "SQL" tag, I assume that you are also looking for an SQL based answer. So in addition to #teylyn suggestion, you can use the following SQL query if you are working with SQL databases:
SELECT table1.Client_Name, table2.Client_Info
FROM table1
RIGHT JOIN table2 ON table1.ID_Number = table2.ID_Number
Here is what this query does:
The RIGHT JOIN will return all rows from the right table (here table2), with the matching rows in the left table (here table1) according to the condition specified by the ON clause (here, if the ID Number is the same). Then, the SELECT clause will return a table with ONLY the columns specified after the keyword SELECT.
In my talned job I am copying data from Excel to SQL table.
For this job to maintain the foreign key constraint I had to do a look up before copying the data.
The task goes like this.
I have to copy data in Table2 (id keys value).
My excel sheet has data for id and keys column. Table 1 has two columns id and value.
For value column's data I want to look at Table1's corresponding entry with the id of the current record in Table2. I have to copy the data from Table1's value column to Table2's value column.
Excel (id 1 2 3, keys a b c)
Table_1 (id 1 2 3, value 123 456 789)
desired output: Table_2 (id 1 2 3, keys a b c, value 123 456 789)
current output: Table_2 (id 1 2 3, keys a b c, value null null null)
How do I properly map this?
You've set the job up exactly as needs to be done really so it's not your job layout that's the problem here.
If you're expecting every record in your Excel document to have a matching record in your database table then you should use an inner join condition in your tMap join like so:
And this then allows you to have an output that grabs everything that isn't joining (which is your issue here):
This should show you everything in your source (not lookup) file that isn't matching. I suspect that everything is failing to match on your join condition (essentially WHERE ExcelDoc.id = Table.Id) even if it looks like it should. This could be down to a mismatch of datatypes as they are read into Talend (so the Java/Talend datatypes such as int/Integer or String rather than the DB types) or because one of your id columns has extraneous whitespace padding.
If you find that your id column in one of your sources does in fact have any padding then you should be able to convert it in a previous step before your join or even just make the transformation in the join:
The only other thing I'd recommend is that you name your flows between components (just click on them to change the name), especially when you are joining anything in a tMap.