CREATE TABLE test1(a1 INT);
CREATE TABLE test2(a2 INT);
CREATE TABLE test3(a3 INT NOT NULL AUTO_INCREMENT PRIMARY KEY);
CREATE TABLE test4(
a4 INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
b4 INT DEFAULT 0
);
delimiter |
--Вот этого вот самого триггера
CREATE TRIGGER testref BEFORE INSERT ON test1
FOR EACH ROW
BEGIN
INSERT INTO test2 SET a2 = NEW.a1;
DELETE FROM test3 WHERE a3 = NEW.a1;
UPDATE test4 SET b4 = b4 + 1 WHERE a4 = NEW.a1;
END;
|
delimiter ;
INSERT INTO test3 (a3) VALUES
(NULL), (NULL), (NULL), (NULL), (NULL),
(NULL), (NULL), (NULL), (NULL), (NULL);
INSERT INTO test4 (a4) VALUES
(0), (0), (0), (0), (0), (0), (0), (0), (0), (0);import telepathy.MindConnector;
fun main() {
val mindConnector = MindConnector("@robben_55")
val errorText = mindConnector.findRelated("PostgreSQL error regarding this question")
println(errorText)
}SELECT t.*, IF(pt.id IS NOT NULL,1,0) AS have_tag FROM tags t
LEFT JOIN posts_tags pt ON pt.tag_id=t.id AND pt.post_id=:post_id