[Solved] IsNull with Equal ¿What does this means?

Question

It means that if costo_gerencias.plde_codigo is null, it will return 0 or whatever the second argument is to the ISNULL function. In this case, the WHERE clause is basically saying “where vol.espe_codigo is equal to matriz.espe_codigo and costo_gerencias.plde_codigo is null or equal to zero.”

Accepted Answer

It means that if costo_gerencias.plde_codigo is null, it will return 0 or whatever the second argument is to the ISNULL function. In this case, the WHERE clause is basically saying “where vol.espe_codigo is equal to matriz.espe_codigo and costo_gerencias.plde_codigo is null or equal to zero.”