create a test database for learning sql #sql

test.sql

CREATE DATABASE IF NOT EXISTS test;
USE test;

DROP TABLE IF EXISTS t1;

CREATE TABLE t1 (
  c1 BIGINT(20) NOT NULL,
  c2 tinytext NOT NULL,
  c3 tinytext NOT NULL,
  c4 DATE NOT NULL,
  KEY c1 (c1)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

LOCK TABLES t1 WRITE;
INSERT INTO t1 VALUES
    (1, 'foo1', 'bar1', '2017-05-01'),
    (2, 'foo2', 'bar2', '2018-01-01'),
    (3, 'foo3', 'bar3', '2015-02-01'),
    (4, 'foo4', 'bar4', '2020-03-01');
UNLOCK TABLES;

DROP TABLE IF EXISTS t2;
CREATE TABLE t2 (
  c1 BIGINT(20) NOT NULL,
  c2 tinytext NOT NULL,
  c3 DECIMAL(10,2) NOT NULL,
  c4 BIGINT(20) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

LOCK TABLES t2 WRITE;
INSERT INTO t2 VALUES
    (1, 'baz', 49.95, 1),
    (2, 'baz', 59.90, NULL),
    (3, 'goo', 79.95, 2),
    (4, 'baz', 59.90, 3),
    (5, 'goo', 29.99, 4),
    (6, 'goo', 99.99, NULL),
    (7, 'goo', 29.99, NULL);
UNLOCK TABLES;