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SQL SELECT from based on truth table

How can I select the columns to be returned by a lookup truth table? my data: | nam | X | Y | | Bob | 2 | 5 | | Jan | 1 | 6 | the lookup table | prop| SHOW | | nam | true | | X | false| | Y | …

SQL query to get rows contains value of another query

I have 2 tables transaction and query. Transaction table have unique tid and the query table has tid_(subtransactionid). I want to get the list of all subtransactions by using tid. I tried this Answer You can join the tables and use the operator LIKE in the ON clause: If your database does not support the fun…

Round Robin order in postgresql

Assume we have this table: ( each object can have an instance multiple times but with different timings for example object A has two instances of 1) object | instance | time ———————–…