SQL Wybierz gdzie w
SELECT * FROM table_name WHERE country IN ('SPAIN', 'MEXICO');
VasteMonde
SELECT * FROM table_name WHERE country IN ('SPAIN', 'MEXICO');SELECT * FROM table_name;
-- Sorting col1 ASCending then col2 DESCending
SELECT col1, col2 FROM table_name ORDER BY col1 ASC, col2 DESC;
-- Filter on col1
SELECT col1, col2 FROM table_name WHERE col1 = 'a value';
-- Containing 'searched'
SELECT col1, col2 FROM table_name WHERE col1 LIKE '%searched%';
-- All different values
SELECT DISTINCT col1 FROM table_name;
-- Simple sum
SELECT col1, sum(col2) FROM table_name GROUP BY col1;SELECT *
FROM Customers
WHERE last_name = 'Doe';SELECT * FROM TABLE_NAME;/*using of where clause*/
Select * from customer
where customer_id = 1