-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-- SIU-GUARANI 3 - Sistema de Gestión Académica
-- Versión 3.0.0
-- Tabla: sga_tesis
-- Check: ck_sga_tesis_prorrogada
-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-- ALTER TABLE sga_tesis DROP CONSTRAINT ck_sga_tesis_prorrogada;
ALTER TABLE sga_tesis ADD CONSTRAINT ck_sga_tesis_prorrogada CHECK (prorrogada IN ('S', 'N'));