I have three tables A, B, C. I have a entity D which is a resultant of these three tables obtained using inner joins on various attributes. Now, I got a row updated in table A and a new row got added in table B. How can this be managed, so that my table D gets updated automatically? Each of these tables consists of 100 000 records.
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I have three tables and each table has its own dataset:
Table A - Dataset A
Table B - Dataset B
Table C - Dataset C
When running the report I get this:
Table A
Table A
Table A
...
Table B
Table B
Table B
...
Table C
Table C
Table C
...
First all the Data of table A is displayed, then table B, then table C. What I want to achieve is that the tables are alternating. It should look like this:
Table A
Table B
Table C
Table A
Table B
Table C
...
Unfortunatly it is not possible to join these three tables via SQL and I want to avoid to use the lookupset-expression, because then all the data would be displayed in one single cell and not in rows and that looks badly. Or is there a way to generate an new row via expression, similar to Environment.NewLine?
I think the best would be to use subreports for the other 2 tables. I assume there some sort of way to associate the planets to the moons that would be used for the parameters. Then add extra add extra Row in Group for the Moon subreport.
The solution proposed by Hannover First works fine. Working with Sub-Reports solves my problem.
Thanks.
I currently have two tables as seen in the pictures below.
The first table is called bottles:
And the second table is called cases:
I am trying to insert into the bottles table where case_id = 0 the two values seen in the cases table (ie case_id=100). They are two seperate tables and I am trying to join them.
Please let me know if I need to use insert, join, or update. I would manually do it however these data points are coming live from a PLC and there will be many more than just the two seen below.
In summary, I need to grab columns from three tables, which all are associated with each other through inbetween tables.
There are four cases with the data:
1. Has data in table A, has data in table B, has data in table C
2. Has data in table A, has data in table B, does not have data in table C
3. Has data in table A, does not have data in table B, has data in table C
4. Has data in table A, does not have in table B, does not have in table C
Is there a single active record query I can use to get the data for all these cases? I cannot use join because the query dies if it come across a row missing any of the pieces. I have tried .includes and .eager_load, but then it does not include the columns from table B or C.
Thank you for your help.
I want to append a table with another table. Table A(a, b, c), Table B(d) should become Table A(a,b,c, d). Assume both tables have same number of records.
I do not think there is any way to do this. Also, this is not logical. What you can do is do a join between the tables. A join is necessarily a Cross product between table A and table B. Read more about joins.
I need to establish a relationship in an existing database containing 3 tables for 3 measurement devices A, B, C that will populate these 3 tables independently:
[table1] [table2] [table3]
id id id
mesA_1 mesB_1 mesC_1
mesA_2 mesB_2 mesC_2
Each sample is assigned a unique id, and that's how we can associates the 3 sets of measurements that correspond to the same sample.
So I have to create the 3 tables and the relationship between the three id keys.
In the end I want to be able to query the database from Excel to display in a single line the measurements of the 3 devices.
I followed tutorials but most of the time they're for 2 tables and not 3. Basically I set every id key as PRIMARY but then I do not know if the relationship is two-way or not, if must chain the 3 tables or define a master and two childs. In short I'm clueless.