Trying to get a value from 5 different tables based on another value

Question

I\'m trying to get the date value from 5 different tables based on the usertype value and display it on DATATABLES table.

F

Answer 1

Your question is clearly caused by a column not having the name you expect. However, your query may still not return what you want, because id values could (at least in theory) be shared among tables.

It is better to move the conditional logic to the on clause:

SELECT COALESCE(type_1.date, type_2.date, type_3.date, type_4.date, type_5.date) 
       tm.id, tm.usertype
FROM table_main tm LEFT JOIN
     table_one type_1
     ON tm.id = type_1.uid AND tm.usertype = 1 LEFT JOIN
     table_two type_2
     ON tm.id = type_2.uid AND tm.usertype = 2 LEFT JOIN
     table_three type_3
     ON tm.id = type_3.uid AND tm.usertype = 3 LEFT JOIN
     table_four type_4
     ON tm.id = type_4.uid AND tm.usertype = 4 LEFT JOIN
     table_five type_5
     ON tm.id = type_5.uid AND tm.usertype = 5 ;

This won't fix the specific error you have. For that, you need to fix the column names.