SQL Server blocked access to procedure 'sys.xp_cmdshell' of component

SQL Server blocked access to procedure 'sys.xp_cmdshell' of component 'xp_cmdshell' because this component is turned off as part of the security configuration for this server. A system administrator can enable the use of 'xp_cmdshell' by using sp_configure. For more information about enabling 'xp_cmdshell', see "Surface Area Configuration" in SQL Server Books Online.

Solution

EXEC sp_configure 'show advanced options', 1
GO
-- To update the currently configured value for advanced options.
RECONFIGURE
GO
-- To enable the feature.
EXEC sp_configure 'xp_cmdshell', 1
GO
-- To update the currently configured value for this feature.
RECONFIGURE
GO



hide again (Rollback)
-- show advanced options
EXEC sp_configure 'show advanced options', 1
GO
RECONFIGURE
GO
-- enable xp_cmdshell
EXEC sp_configure 'xp_cmdshell', 1
GO
RECONFIGURE
GO
-- hide advanced options
EXEC sp_configure 'show advanced options', 0
GO
RECONFIGURE
GO

Driver class 'org.gjt.mm.mysql.Driver' could not be found

Driver class 'org.gjt.mm.mysql.Driver' could not be found, make sure the 'MySQL' driver (jar file) is installed. org.gjt.mm.mysql.Driver

Issue : Creating connection with MySQL with kettle, was using 

• Data Integration Kettle version 9.0
• Mysql Driver version 8.0.25

Error

Driver class 'org.gjt.mm.mysql.Driver' could not be found, make sure the 'MySQL' driver (jar file) is installed. org.gjt.mm.mysql.Driver

Solution

Get version 5 latest driver from url https://downloads.mysql.com/archives/c-j/  (it is 5.1.49)

ALTER TABLE statement conflicted with the FOREIGN KEY constraint

Server Type - MS SQL  Server

Scanerio : Error faced when tried to apply foreign key constraint on table having data in it (non empty table).

Error

Msg 547, Level 16, State 0, Line 20 The ALTER TABLE statement conflicted with the FOREIGN KEY constraint "". The conflict occurred in database "", table "dbo.", column '**'

Solution

Empty table first then apply foreign key

 

Dividing Number Return ZERO Postgres

 If you are also facing same issue, here is solution

EARLIER

select (15/20)
 
Output

0

NOW

use this command to get correct output in postgres

select (15/20::float)::numeric(5,2)

Output 

0.75 

 

you can Also  create function in database

CREATE OR REPLACE FUNCTION dvdrental1(part int, fullv int) RETURNS float AS $$
BEGIN
  RAISE NOTICE 'PROGRESS IN PERCENT : %', (part/fullv::float)::numeric(5,2);
  RETURN part/fullv::float;
END;
$$  LANGUAGE plpgsql VOLATILE
  COST 100;

Postgres DvdRental Sample Database Restore Error

I was facing error while restoring the database dvdrental for postgres. Postgres 9 was installed on my machine and connect as postgres user with database postgres.

First i tried to execute restore.sql script using pgadmin sql executor and throw below error:

ERROR:  syntax error at or near ''\''
LINE 35: \connect

SOLUTION
SQL need to execute on CMD, so open CMD and move to postgres installation directory

cd C:\Program Files\PostgreSQL\9.5\bin
>Enter

psql -h localhost -d postgres -U postgres -p 5432 -a -q -f C:\Users\userPostgres\Downloads\dvdrental\restore.sql

On Execution again faced error

psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:920: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3057.dat" for reading: Permission denied




COPY public.actor (actor_id, first_name, last_name, last_update) FROM stdin;
COPY public.actor (actor_id, first_name, last_name, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3057.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:920: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3057.dat" for reading: Permission denied
--
-- Data for Name: address; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.address (address_id, address, address2, district, city_id, postal_code, phone, last_update) FROM stdin;
COPY public.address (address_id, address, address2, district, city_id, postal_code, phone, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3065.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:928: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3065.dat" for reading: Permission denied
--
-- Data for Name: category; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.category (category_id, name, last_update) FROM stdin;
COPY public.category (category_id, name, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3059.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:936: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3059.dat" for reading: Permission denied
--
-- Data for Name: city; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.city (city_id, city, country_id, last_update) FROM stdin;
COPY public.city (city_id, city, country_id, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3067.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:944: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3067.dat" for reading: Permission denied
--
-- Data for Name: country; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.country (country_id, country, last_update) FROM stdin;
COPY public.country (country_id, country, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3069.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:952: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3069.dat" for reading: Permission denied
--
-- Data for Name: customer; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.customer (customer_id, store_id, first_name, last_name, email, address_id, activebool, create_date, last_update, active) FROM stdin;
COPY public.customer (customer_id, store_id, first_name, last_name, email, address_id, activebool, create_date, last_update, active) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3055.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:960: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3055.dat" for reading: Permission denied
--
-- Data for Name: film; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.film (film_id, title, description, release_year, language_id, rental_duration, rental_rate, length, replacement_cost, rating, last_update, special_features, fulltext) FROM stdin;
COPY public.film (film_id, title, description, release_year, language_id, rental_duration, rental_rate, length, replacement_cost, rating, last_update, special_features, fulltext) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3061.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:968: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3061.dat" for reading: Permission denied
--
-- Data for Name: film_actor; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.film_actor (actor_id, film_id, last_update) FROM stdin;
COPY public.film_actor (actor_id, film_id, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3062.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:976: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3062.dat" for reading: Permission denied
--
-- Data for Name: film_category; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.film_category (film_id, category_id, last_update) FROM stdin;
COPY public.film_category (film_id, category_id, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3063.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:984: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3063.dat" for reading: Permission denied
--
-- Data for Name: inventory; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.inventory (inventory_id, film_id, store_id, last_update) FROM stdin;
COPY public.inventory (inventory_id, film_id, store_id, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3071.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:992: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3071.dat" for reading: Permission denied
--
-- Data for Name: language; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.language (language_id, name, last_update) FROM stdin;
COPY public.language (language_id, name, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3073.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:1000: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3073.dat" for reading: Permission denied
--
-- Data for Name: payment; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.payment (payment_id, customer_id, staff_id, rental_id, amount, payment_date) FROM stdin;
COPY public.payment (payment_id, customer_id, staff_id, rental_id, amount, payment_date) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3075.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:1008: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3075.dat" for reading: Permission denied
--
-- Data for Name: rental; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.rental (rental_id, rental_date, inventory_id, customer_id, return_date, staff_id, last_update) FROM stdin;
COPY public.rental (rental_id, rental_date, inventory_id, customer_id, return_date, staff_id, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3077.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:1016: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3077.dat" for reading: Permission denied
--
-- Data for Name: staff; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.staff (staff_id, first_name, last_name, address_id, email, store_id, active, username, password, last_update, picture) FROM stdin;
COPY public.staff (staff_id, first_name, last_name, address_id, email, store_id, active, username, password, last_update, picture) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3079.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:1024: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3079.dat" for reading: Permission denied
--
-- Data for Name: store; Type: TABLE DATA; Schema: public; Owner: postgres
--
COPY public.store (store_id, manager_staff_id, address_id, last_update) FROM stdin;
COPY public.store (store_id, manager_staff_id, address_id, last_update) FROM 'C:\Users\userPostgres\Downloads\dvdrental\3081.dat';
psql:C:/Users/userPostgres/Downloads/dvdrental/restore.sql:1032: ERROR:  could not open file "C:\Users\userPostgres\Downloads\dvdrental\3081.dat" for reading: Permission denied



SOLUTION
1. Check Directory permission (read,write) to window user
2. Change "dvdrental" directory to some another drive, i moved folder to E drive, now path is as below, Also dont forget to change the path within the restore.sql file



psql -h localhost -d postgres -U postgres -p 5432 -a -q -f E\dvdrental\restore.sql