Altar
A
SELECT *
FROM employees; correcta
B
SELECTlast_name, job_id, salary
FROM employees; correcta
C
SELECT last_name, job_id, salary Sal
FROM employees; correcta
D
SELECT last_name, job_id, 1 + (salary x 10)
FROM employees incorrecta,se debe sustituir la x por un asterisco
E
SELECT last_name || job_id SALARY AS Annual Salary
FROM employees; falta una coma antes de SALARY y poner annual salary entre comillas
FSELECT last_name || job_id SALARY AS Annual Salary
FROM employees; idem al de arriba
G
SELECT 1234, cod#, last_name , 1990-02-27
FROM employees; no existe la columna cod#
H
SELECTlast_name || “-” || First_Name AS 'Name'
FROM employees; se esperan comillas dobles, no simples
I
SELECT DISTINCT *
FROM employees; correcta
J
SELECT last_name || ' 'commission_pct
FROM employees; correcta
Respuestas:
2. El departamento de RRHH requiere de una lista de todos los códigos utilizados para los cargos de la tablaemployees.
job_id ------------
AC_ACCOUNT ...
(19 rows )
R: select distinct job_id
From employees
3. El departamento de RRHH requiere una descripción mas completa de sus empleados,dicho reporte debe contener como encabezado Emp #, Employee, Job y Hire Date.
Emp# | employee | job | Hire Date
------+-------------+------------+------------
145 | John |SA_MAN | 1996-10-01 ...
(107 rows )
R: SELECT employee_id as "emp#", first_name as employee, job_id as job, hire_date as "hire date"
from employees;
4. El departamento de RRHH requiereel last_name, job_id, salary y sumar a todos los empleados 100$ al salario y mostrar el resultado en una nueva columna con el nombre de New Salary.
last_name | job_id | salary | New Salary...
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