How to add an auto-incrementing primary key to an existing table, in PostgreSQL

function processSQLFile(fileName) {

  // Extract SQL queries from files. Assumes no ';' in the fileNames
  var queries = fs.readFileSync(fileName).toString()
    .replace(/(\r\n|\n|\r)/gm," ") // remove newlines
    .replace(/\s+/g, ' ') // excess white space
    .split(";") // split into all statements
    .map(Function.prototype.call, String.prototype.trim)
    .filter(function(el) {return el.length != 0}); // remove any empty ones

  // Execute each SQL query sequentially
  queries.forEach(function(query) {
    batch.push(function(done) {
      if (query.indexOf("COPY") === 0) { // COPY - needs special treatment
        var regexp = /COPY\ (.*)\ FROM\ (.*)\ DELIMITERS/gmi;
        var matches = regexp.exec(query);
        var table = matches[1];
        var fileName = matches[2];
        var copyString = "COPY " + table + " FROM STDIN DELIMITERS ',' CSV HEADER";
        var stream = client.copyFrom(copyString);
        stream.on('close', function () {
          done();
        });
        var csvFile = __dirname + '/' + fileName;
        var str = fs.readFileSync(csvFile);
        stream.write(str);
        stream.end();
      } else { // Other queries don't need special treatment
        client.query(query, function(result) {
          done();
        });
      }
    });
  });
}

select
    v.printed_code,
    id_to_text(vd.id) as id_,
    id_to_time(vd.id) as created_at,
    vd.*
from vehicle_diagnostic vd 
left join vehicle v on vd.vehicle_id = v.id
where v.printed_code = '999007'
order by 3 desc
----
select
    v.printed_code,
    id_to_text(vr.id) as id_,
    id_to_time(vr.id) as created_at,
    vr.*
from vehicle_repair vr
left join vehicle v on vr.vehicle_id = v.id
where v.printed_code = '999007'
order by 3 desc
----
----
select
    *
from vehicle_distribution v
order by id desc

Better: COPY {table_name}({table_columns}) FROM STDIN WITH (DELIMITER ',', NULL '?', FORMAT CSV, HEADER TRUE);


Also Possible, but worse: copy r from 'file.csv' WITH NULL AS 'NULL' DELIMITER ';' CSV HEADER;

-- updating a table during runtime of the script with a join

ALTER TABLE shops_per_city ADD merchant_type DOUBLE;
/*ALTER TABLE shops_per_city ADD city_latitude DOUBLE*/

UPDATE shops_per_city AS shop
INNER JOIN city_list AS city
ON shop.city_id = city.city_id
SET shop.city_latitude = city.city_latitude;


-- selecting the list for a where statement with a subquery

SELECT * 
FROM shopstation
WHERE Dealer_ID_Long IN 
	(select Dealer_ID_Long
	FROM shop_list);
	
-- also possible to join on a subquery (notice that there is no ; in the subquery)
SELECT *, -- this select needs to have all columns of the result table
FROM shopcounter_category_daily_v2 AS shop
INNER JOIN 
	(SELECT *
	FROM weather_owm_daily_2014
	WHERE cityId = 2761369) AS weather
ON shop.RECORD_DATE = weather.DATE;

-- update a column using CASE
UPDATE creditcard_merchtype 
SET online =
	(CASE
    	WHEN Merchantname LIKE "%.at%" THEN 1
    	WHEN Merchantname LIKE "%.com%" THEN 1
    	ELSE 0
	END);
	
-- alter column name	
ALTER TABLE creditcard_at_v1 CHANGE cityId city_id INT;


-- creating temporary table for later use:

CREATE TEMPORARY TABLE id_list AS
SELECT COUNT(*) AS days, dealer_name, DEALER_ID, Dealer_ID_Long
FROM shopcounter
WHERE YEAR(RECORD_DATE) > 2017
GROUP BY dealer_name, DEALER_ID, Dealer_ID_Long
HAVING days > 752;

CREATE TABLE shopcounter_stable AS
SELECT *
FROM shopcounter
WHERE Dealer_ID_Long IN 
	(SELECT Dealer_ID_Long
	FROM id_list) && YEAR(RECORD_DATE) > 2017;

#!/bin/bash -v

hadoop fs -put ./AllstarFull.csv /user/bigdataproject/AllstarFull.csv
hive -f ./AllstarFull.hive






hadoop fs -put ./Appearances.csv /user/bigdataproject/Appearances.csv
hive -f ./Appearances.hive






hadoop fs -put ./AwardsManagers.csv /user/bigdataproject/AwardsManagers.csv
hive -f ./AwardsManagers.hive

insert into table db_name.table_name
select 'ALL','Done';

-- create the databases
CREATE DATABASE IF NOT EXISTS projectone;

-- create the users for each database
CREATE USER 'projectoneuser'@'%' IDENTIFIED BY 'somepassword';
GRANT CREATE, ALTER, INDEX, LOCK TABLES, REFERENCES, UPDATE, DELETE, DROP, SELECT, INSERT ON `projectone`.* TO 'projectoneuser'@'%';

FLUSH PRIVILEGES;

RUN sed -Ei 's/^(bind-address|log)/#&/' /etc/mysql/my.cnf

select * 
from folder f
  join uploads u ON u.id = f.folderId 
where '8' = ANY (string_to_array(some_column,','))

SELECT string_to_array('xx~^~yy~^~zz', '~^~', 'yy');

ALTER TABLE test1 ADD COLUMN id SERIAL PRIMARY KEY;

This is all you need to:

Add the id column
Populate it with a sequence from 1 to count(*).
Set it as primary key / not null.

SELECT POSITION('our' in 'w3resource');

SELECT id, account_id, amount, created_at, null as type
 	FROM subscription_invoice
UNION ALL
SELECT id, account_id, amount, created_at, 
	`type` as type
FROM subscription_payment
ORDER BY created_at DESC

SELECT 
    orderNumber,
    orderDate,
    customerName,
    orderLineNumber,
    productName,
    quantityOrdered,
    priceEach
FROM
    orders
INNER JOIN orderdetails 
    USING (orderNumber)
INNER JOIN products 
    USING (productCode)
INNER JOIN customers 
    USING (customerNumber)
ORDER BY 
    orderNumber, 
    orderLineNumber;

ALTER PARTITION SCHEME [sh_trans_date]
 NEXT USED [PRIMARY]
 ALTER PARTITION FUNCTION [pf_trans_date_byhour]() SPLIT RANGE('2019/03/29')