I have a grid view where I need to show data of more than a table, each record in a row (Not relations).
Thus, a group of grid rows may come from table one, another group of rows from table two, ect...
For example, I need to select from tbl1 rows (suppose r1 to r10), and from table tbl2, rows (suppose r11 to r20) r1 to r10 and r11 to r20 may have a lot of common id's (because from different tables). And I want to show all these records in a single grid view, with search and actions enabled.
I have made an attempt to get data in arrayDataProvider, and it worked perfect.
The problems I am trying to fix are two:
1. Enabling the searchModel in the grid. (For that, I have also get all data in the search model in arrayDataProvider, but still need to enable search).
2. I need to know which record is selected for(view, update, or delete) and take action based on the selection, because the same id may exist in the grid multiple times, each from a table.
To Enable Search:
1. I have used all search models to return arrays based on filtering queries.
2. I have used a basic search model that includes common attributes between all tables, it calls functions from other search models to get array from them, then it concatenates all these arrays and returns them as an array data provider.
3. Needed some attention when dealing with parameters in search models, because they are using the same model as the basic, they have more fields.
When I treat id's and acyions on rows, I will post the method.
If any one having the same issue, and need help, I will be :-)
Related
I have a table that contains data from repeated experiments (for example, site A has one sample, and the lab processed the sample three times obtaining slightly different values). I need to average these results in a separate table, but what I have read on the Microsoft support site is that a query that pulls data into another table with a calculated field is not possible on Access.
Can I query multiple data points from one table into a single calculated field in another table? Thank you.
UPDATE
I ended up doing a lot of manual adjustments of the file format to create a calculated field in the existing table that averages each sites data, so my problem is, for my current purposes, solved. However I would still like to understand. Following up with you both, I think the problem was that I had repeated non-unique IDs between rows when I probably should have made data columns with unique variable names so that I could query each variable name for an average.
So, instead of putting each site separately on the y axis, I formatted it by putting the sample number for each site on the x-axis:
I was able to at least create a calculated field using this second format in order to create an average value for each site.
Would have there been a way to write a query using the first method? Luckily, my data set was not at all very hefty, so I could handle a reformat manually, but if the case were with thousands of data entries, I couldn't have done that.
Also, here is the link to the site I mentioned originally https://support.office.com/en-ie/article/add-a-calculated-field-to-a-table-14a60733-2580-48c2-b402-6de54fafbde3.
Thanks all.
I have job in Talend that is designed to bring together some data from different databases: one is a MySQL database and the other a MSSQL database.
What I want to do is match a selection of loan numbers from the MySQL database (about 82,000 loan numbers) to the corresponding information we have housed in the MSSQL database.
However, the tables in MSSQL to which I am joining the data from MySQL are much larger (~ 2 million rows), are quite wide, and thus cost much more time to query. Ideally I could perform an inner join between the two tables based on the loan number, but since they are in different databases this is not possible. The inner join that is performed inside a tMap occurs after the Lookup input has already returned its data set, which is quite large (especially since this particular MSSQL query will execute a user-defined function for each loan number).
Is there any way to create a global variable out of the output from the MySQL query (namely, the loan numbers selected by the MySQL query) and use that global variable as an IN clause in the MSSQL query?
This should be possible. I'm not working in MySQL but I have something roughly equivalent here that I think you should be able to adapt to your needs.
I've never actually answered a Stackoverflow question and while I was typing this the page started telling me I need at least 10 reputation to post more than 2 pictures/links here and I think I need 4 pics, so I'm just going to write it out in words here and post the whole thing complete with illustrations on my blog in case you need more info (quite likely, I should think!)
As you can see, I've got some data coming out of the table and getting filtered by tFilterRow_1 to only show the rows I'm interested in.
The next step is to limit it to just the field I want to use in the variable. I've used tMap_3 rather than a tFilterColumns because the field I'm using is a string and I wanted to be able to concatenate single quotes around it but if you're using an integer you might not need to do that. And of course if you have a lot of repetition you might also want to get a tUniqueRows in there as well to save a lot of unnecessary repetition
The next step is the one that does the magic. I've got a list like this:
'A1'
'A2'
'B1'
'B2'
etc, and I want to turn it into 'A1','A2','B1','B2' so I can slot it into my where clause. For this, I've used tAggregateRow_1, selecting "list" as the aggregate function to use.
Next up, we want to take this list and put it into a context variable (I've already created the context variable in the metadata - you know how to do that, right?). Use another tMap component, feeding into a tContextLoad widget. tContextLoad always has two columns in its schema, so map the output of the tAggregateRows to the "value" column and enter the name of the variable in the "key". In this example, my context variable is called MyList
Now your list is loaded as a text string and stored in the context variable ready for retrieval. So open up a new input and embed the variable in the sql code like this
"SELECT distinct MY_COLUMN
from MY_SECOND_TABLE where the_selected_row in ("+
context.MyList+")"
It should be as easy as that, and when I whipped it up it worked first time, but let me know if you have any trouble and I'll see what I can do.
I've got two tables binded to two different datasets. I'm trying to reference one of the rows from one of the tables (Table A) from Table B.
Since it's outside the scope of the table, I can't use ReportItems![Textbox name].Value
Any ideas?
You can use the SSRS Lookup() or LookupSet() function to retrieve the data directly from the other dataset.
I found the MSDN pages a bit unclear, the syntax goes like this:
=LOOKUP(Fields!sourceMatchingField.Value,
Fields!targetMatchingField.Value,
Fields!targetReturnField.Value,
"Name of Second Dataset"
)
Fields!sourceMatchingField.Value is from the dataset that is
currently in scope.
Fields!targetMatchingField.Value is from the other data set you need to get information from and equals Fields!sourceMatchingField.Value.
These two parameter values for the Lookup function make the join criteria for the two datasets. They can be more complicated than simply two field references (such as using functions to manipulate on or both), but I'm just showing the simplest way to do it.
Fields!targetReturnField.Value is the field from the second dataset that you want to return. This should just be a reference to a field.
"Name of Second Dataset" is just what you've named the other dataset that you're joining to.
Basics about the database
I am working on a (relatively) simple database that stores inventory data. I am using Microsoft Access 2010 in order to do this. I have six tables with the following relationships:
Relationships of Database
I have created forms which combine the Transaction table with Ordered, Received, Allocated, or Dispensed. Each form requests an amount which will then be used to update On Hand, On Order, or Allocated (from the Material table) respectively.
The Problem
For example, my form to update Transaction and Order should be able to take in the Amount ordered, save all the data from the fields to the Transaction and Order tables as well as add the amount from Amount to On Order in the Materials table.
I have been working on this database for the past two days. I have searched several times for possible ways to perform a similar function, but have come up with nothing. All the tutorials I have found which seem remotely close to what I need to accomplish are for versions of Access which are much older than 2010. Unfortunately I have had little experience with the actual coding within Access, so I am stuck clicking around within the buttons on its menus.
What I have tried
Currently, the program is set to run the following Update query:
Screenshot of update query
This query works if I have one Material stored in the database but adds all the Amount values from Ordered to On Order every time it is ran, which is unfortunately not what I need it to do. I only need each Amount value added to On Order once.
You need to relate the Ordered and Material tables by adding a foreign key field to the Material table, ex. OrderedFK (Long Integer). This new field must be updated whenever a row is inserted into the Ordered table (assuming the "No" Field is AutoNumber). This is typically performed by using a Form (Ordered) and Sub-Form (Material) and setting the sub-form' Link Master (No) and Link Child fields (OrderedFK).
You can then join the Ordered and Material tables on the Update Query to achieve the desired result.
I'm creating a form in CodeIgniter that has a paired value- Companies, and CEOs. The idea is, while there is only one Company field with one CEO field below initially on the form, there is a button for me to create more pairs of Company-CEO fields. I have an idea for how to make that appear on the frontend, but I'm not quite sure which is the best way to store it on the backend.
I think in order to combine each Company and CEO field into one value for storing in the MySQL database, I could simply use CONCAT. However, I'm not sure if I should even bother creating such a value. In any case, how would I handle the fact that there are a variable number of Companies (and thus CEOs) for each record? Would I have to store Company and CEO within another value? How could such an array or tuple be handled in MySQL?
Point 1: Do not combine the values. It will give you headaches in code splitting and combining. Make two columns, one for company, one for CEO.
Point 2: In general, when using a database, any time you have a list it gets its own table.
The various JS libraries out there let you handle this with a grid.