--Except: Get the records in table_1 but not in table_2 --Intersect:Get the records which in table_1 and table_2 ...
It works similar like union clause as it is used to combine two SELECT statements, but it returns tuples only from first SELECT statement which are common to tuples in the second SELECT statement.
/* 53. Construir una tabla derivada compuesta por los nombres de empresa, de clientes y de proveedores con sus respectivas direcciones, distritos y descripción de provincia. */ /* Ordenarlo para que ...
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