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SET statement considers 0 as null

I don’t how to explain my problem but I will try my best to be clear. I am trying to create a stored procedure that will be used to handle holidays requests. I have two tables: Table A contains the …

Difference String on Postgres

I have two string that contain one and zeros. I want to determine how many chars are different the same position. For example: “0000111000000000000000000000000000000000000000000000000000000000” AND …