remove postgresql ubuntu
sudo apt-get --purge remove postgresql
sudo apt-get purge postgresql*
sudo apt-get --purge remove postgresql postgresql-doc postgresql-commonremove postgresql ubuntu
sudo apt-get --purge remove postgresql
sudo apt-get purge postgresql*
sudo apt-get --purge remove postgresql postgresql-doc postgresql-commonpostgres remove database
DROP DATABASE IF EXISTS database_name;postgres delete database
CREATE DATABASE testdb1;
DROP DATABASE testdb1;drop database postgres
DROP DATABASE base_de_datos;
// SI SALE ESTE MESAJE DE ERROR HAGA LOS PASOS QUE ESTAN A CONTINUACION
ERROR: database "base_de_datos" is being accessed by other users
SQL state: 55006
Detail: There is 1 other session using the database.
----------------------------------------------------------------------
// primer paso ---------------------------------
SELECT *
FROM pg_stat_activity
WHERE datname = 'base_de_datos';
//segundo paso --------------------------------
SELECT
pg_terminate_backend (pg_stat_activity.pid)
FROM
pg_stat_activity
WHERE
pg_stat_activity.datname = 'base_de_datos';
// tercer paso --------------------------------
DROP DATABASE 'base_de_datos';
// retira las comillas si no funciona
DROP DATABASE base_de_datos;drop enum postgres
CREATE TYPE admin_level1 AS ENUM ('classifier', 'moderator');
CREATE TABLE blah (
user_id integer primary key,
power admin_level1 not null
);
INSERT INTO blah(user_id, power) VALUES (1, 'moderator'), (10, 'classifier');
ALTER TYPE admin_level1 ADD VALUE 'god';
INSERT INTO blah(user_id, power) VALUES (42, 'god');
-- .... oops, maybe that was a bad idea
CREATE TYPE admin_level1_new AS ENUM ('classifier', 'moderator');
-- Remove values that won't be compatible with new definition
-- You don't have to delete, you might update instead
DELETE FROM blah WHERE power = 'god';
-- Convert to new type, casting via text representation
ALTER TABLE blah
ALTER COLUMN power TYPE admin_level1_new
USING (power::text::admin_level1_new);
-- and swap the types
DROP TYPE admin_level1;
ALTER TYPE admin_level1_new RENAME TO admin_level1;postgres delete database
DROP DATABASE db_name;react native textinput
import React, { Component } from 'react';
import { TextInput } from 'react-native';
export default function UselessTextInput() {
const [textInputValue, setTextInputValue] = React.useState('');
return (
<TextInput
style={{
height: 40,
borderColor: 'gray',
borderWidth: 1,
placeholderTextColor: 'gray',
}}
onChangeText={text => setTextInputValue(text)}
value={textInputValue}
placeholder="Insert your text!"
/>
);
}react native input
import React, { Component } from 'react';
import { TextInput } from 'react-native';
export default function UselessTextInput() {
const [value, onChangeText] = React.useState('Useless Placeholder');
return (
<TextInput
style={{ height: 40, borderColor: 'gray', borderWidth: 1 }}
onChangeText={text => onChangeText(text)}
value={value}
/>
);
}Copyright © 2021 Codeinu
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