I have an assignment where I have two tables. Both of these two tables have multiple records that can be grouped by a certain ID creating record sets within those two tables
Those record sets can have various number of records. The trick is I have to compare those two tables and compare them by those record sets. If one record set ordered by update date (one of the record fields) doesn't find an identical record set in another table, I have to output that record set
What is the best way to do it? How do I compare two different tables by record groups/record sets/record blocks?
Should I use sub-query factoring? Should I temporary tables? Should I use something else?
Thank you very much for your generous responses and please let me know if I made my question unclear
i guess you just need a minus query to show the differences.
If you use Toad there is a specific function. Or you can use the minus operator or read this other post link
Related
I don't know if I even worded the question correctly, but I'm trying to create a measure that depends on what is showing in the pivot table (using PowerPivot). In the image I posted, "DealMonth" is an expression in the PowerQuery table itself that simply takes the start date of the employee and subtracts it from the month a deal was closed in. That will show how long it took for that salesperson to close the deal. "TenureMonths" is also an expression in the PowerQuery table that calculates the tenure of the person. The values populating this screenshot are coming from a total headcount measure created. What I'm trying to do is create a separate measure that will show when the "TenureMonths" is less than the "DealMonth." So if the TenureMonths is 5, then after DealMonth of 5, the value would be 0. Is this possible?
Screenshot
I should add the following information.
"DealMonth" - Comes from the FactData table
"TenureMonths" - Comes from the DimSalesStart table
These two tables are joined by name. I feel like I'm so close because I can see what I want. The second image below is a copy/paste of the pivot table result but with my edits to show what I'd want to have shown. Basically, if(TenureMonths >= DealMonth,1,0). The trouble seems to be that since they're in two different tables, I can't make it work. The rows in the fact table are transactions, but the rows in the dim table are just the people with their start and end dates.
Desired Result
This is possible with some IF([measure1]<[measure2],blank(),[measure1]), however without seeing more of the data it will be hard to guide you specifically.
However you need to create two separate measures, one for TenureMonths and one for DealMonth, depending on the data this can be done with an aggregator forumla such as sum, min, max, etc (depends if there will be more than one value).
Then reference those two measures in the formula pattern I mentioned above, and that should give you want you want.
I figured out a solution. I added a dimension table for DealMonth itself and joined to my fact table. That allowed me to do the formulas that I needed.
I have this situation. Starting from a table, I have to check all the records that match a key. If records are found, I have to check another table using a key from the first table and so on, more on less on five levels. There is a way to do this in a recursive way, or I have to write all the code "by hand"? The language I am using is Visual Fox Pro. If this is is not possible, is it al least possible to use recursion to popolate a treeview?
You can set a relation between tables. For example:
USE table_1.dbf IN 0 SHARED
USE table_2.dbf IN 0 SHARED
SET ORDER TO TAG key_field OF table_2.cdx IN table_2
SET RELATION TO key_field INTO table_2 ADDITIVE IN table_1
First two commands open table_1 and table_2. Then you have to set the order/index of table_2. If you don't have an index for the key field then this will not work. The final command sets the relation between the two tables on the key field.
From here you can browse both tables and table_2's records will be filtered based on table_1's key field. Hope this helps.
If the tables have similar structure or you only need to look at a few fields, you could write a recursive routine that receives the name of the table, the key to check, and perhaps the fields you need to check as parameters. The tricky part, I guess, is knowing what to pass down to the next call.
I don't think I can offer any more advice without at least seeing some table structures.
Sorry for answering so late, but the problem was of course that the recursion wasn't a viable solution since I had to search inside multiple tables. So I resolved by doing a simple 2-Level search in the tables that I needed.
Thank you very much for the help, and sorry again for answering so late.
I would like to compare data between two tables say source and destination and output the difference,
the problem is there's a mapping table which stores the columns of source table and corresponding columns of destination.
For example,
Table: T_MAP
SourceTableName SourceTableColumns DestinationTable DestinationTableColumn
s_t1 s_t1_col1 d_t1 d_t1_col1
s_t1 s_t1_col2 d_t d_t1_col2
s_t2 s_t2_col1 d_t2 d_t2_col1
....
So the question is how to compare the data between two tables with the map table.
Current idea is using dynamic cursor to generate dynamic sql statement, then using minus+union all to compare data. But the performance may be a big problem.
Is there any thoughts?
Please help..
Thanks in advance.
I'm trying to get the following done: Using Altova Mapforce, I use an XML file with schema as a source. I want to map it to exactly the same output, but only add data to one field.
The value of the field (it's Tax) is determined using a two table SQL join with a WHERE clause over both tables. The tables are joined using foreign keys, the relation is recognized by Mapforce.
The first field of the WHERE clause comes from the first table (header type table), the second and third field from the second tables (lines type tables).
However, I cannot seem to create the logical and correct equivalent of what I am describing here. I've tried it using complex AND constructions where it then inserts the one field I would need multiple times. I've tried WHERE clauses but they fail as they never supply both tables at the same time and there seems to be no way to use a pre-specified JOINing of two tables as a source. The WHERE clause then recognizes only the fields from the first table, not the second one.
Is there an example for this? Joining two (or more) tables, using WHERE to determine the exact row, then using a value from that row?
Best wishes.
I have a report that needs to be generated from two different queries.
The first query retrieves a list of information from one data source
The second query must then be called once for each of the records returned by the first query?
Each result set from the second query will then be displayed in separate report tables.
Any pointers are welcome.
It is not possible to perform a SQL join on the first and second query.
Yes this is possible lets assume you have bind your first query results to data table. you can create another table inside the parent table cell and assign your 2 data set to that table with filter of dataset 1
http://publib.boulder.ibm.com/infocenter/rmc/v7r5m0/index.jsp?topic=/org.eclipse.birt.doc/birt/birt-13-1.html
http://publib.boulder.ibm.com/infocenter/rmc/v7r5m0/index.jsp?topic=/org.eclipse.birt.doc/birt/birt-13-2.html
The functionality I require is provided by SubReports
http://www.eclipse.org/birt/phoenix/examples/reports/birt2.1/subreport/index.php