HOW TO JOIN ON NULL VALUES IN SQL | Tricky SQL Problems | SQL Interview Questions

แชร์
ฝัง
  • เผยแพร่เมื่อ 15 ก.ย. 2024
  • In these video, I am going to show you a trick in SQL.
    I am going to show you how you can join on Null values in SQL.
    CREATE TABLE `db`.`product_price` (
    `pid` INT NULL,
    `p_price` INT NULL);
    CREATE TABLE `db`.`product_name` (
    `pid` INT NULL,
    `p_name` VARCHAR(30) NULL);
    INSERT INTO `db`.`product_name` VALUES (1,"Apple");
    INSERT INTO `db`.`product_name` VALUES (2,"Banana");
    INSERT INTO `db`.`product_name` VALUES (3,"Mangoes");
    INSERT INTO `db`.`product_name` VALUES (4,"Orange");
    INSERT INTO `db`.`product_name` VALUES (NULL,"Kiwi");
    INSERT INTO `db`.`product_price` VALUES (1,100);
    INSERT INTO `db`.`product_price` VALUES (2,50);
    INSERT INTO `db`.`product_price` VALUES (3,70);
    INSERT INTO `db`.`product_price` VALUES (4,60);
    INSERT INTO `db`.`product_price` VALUES (NULL,140);
    INSERT INTO `db`.`product_price` VALUES (NULL,160);

ความคิดเห็น • 6