003-1 El Lenguaje Estandar SQL - InSTRUCIONES DDL (Completo)
LENGUAJE ESTANDAR SQL
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EJEMPLO DDL CREATE TABLE "INVESTIGADOR" ( "DNI_INVESTIGADORR" CHAR(9) NOT NULL ENABLE,
"NOMBRE_INVESTIGADOR" CHAR(50) NOT NULL ENABLE, "CIUDAD" CHAR(15), "TELEFONO" CHAR(12), CONSTRAINT "INVESTIGADOR_PK" PRIMARY KEY
("DNI_INVESTIGADORR") ENABLE ) /
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EJEMPLO DML•SELECT *•FROM INVESTIGADOR;•WHERE CIUDAD=TULUA
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EJEMPLO DE DCLCREATE TABLE "INVESTIGADOR" ( "DNI_INVESTIGADORR" CHAR(9) NOT NULL ENABLE,
"NOMBRE_INVESTIGADOR" CHAR(50) NOT NULL ENABLE, "CIUDAD" CHAR(15), "TELEFONO" CHAR(12), CONSTRAINT "INVESTIGADOR_PK" PRIMARY KEY ("DNI_INVESTIGADORR")
ENABLE ) /
alter table "INVESTIGADOR" rename column"DNI_INVESTIGADORR" to "DNI_INVESTIGADOR"/
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M O TO R D E A C C E SSELECT DEPARTAMENTO.NOMBRE, DEPARTAMENTO.NUMEROD,
EMPLEADO.NOMBREFROM DEPARTAMENTO, EMPLEADOWHERE (((DEPARTAMENTO.NOMBRE)='INVESTIGACION') AND
((DEPARTAMENTO.NUMEROD)=[EMPLEADO].[NUMEROD]));
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EJEMPLO DE RENOMBRAMIENTO• select nombre,ciudad,tipoparticipacionfrom asignado_a, investigadorWhere
(asignado_a.codigoinvestigador=investigador.codigoinvestigador)
• select i.nombre, i.ciudad, a.tipoparticipacionfrom asignado_a a, investigador iwhere (a.codigoinvestigador=i.codigoinvestigador)
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TALLER
• REALIZAR EL TALLER NUMERO 1