Retrieve data from multiple tables

There are 21 tables. I would like to get the values that meet the requirements of the specified column from these tables.
however, I cannot get any value when the application runs. only the total number of tables registered in the database is coming. I could not solve this problem. where is my fault. Thanks for your help.

Is this list picker showing a properly list based on the first query?

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Is this list picker showing a properly list based on the first query?

YES

Set a label here and have it show the elements one at a time as it loops through.

this solution was not. or I failed. Now we have 21 tables. with this method, I took the sum of the values in different tables. but now when I want to count the values , the total number of tables in the database is coming. in an event I could not succeed; different tables a
I cannot get the sum or number of (var) text values in column. it comes with a single value. I will go nuts. If you have time, can you send a small block sample.

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