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Jan 6th, 2020
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Java 1.58 KB | None | 0 0
  1. -------------
  2.  
  3. INSERT INTO `gamebar`.`employees` (`first_name`, `last_name`)
  4.      VALUES ('Test1', 'Test1');
  5.      
  6. --------------
  7.  
  8. DELETE FROM `gamebar`.`employees` WHERE (`id` = '8');
  9.  
  10. ---------------
  11.  
  12. ALTER TABLE `gamebar`.`employees`
  13. ADD COLUMN `midle_name` VARCHAR(45) NOT NULL AFTER `first_name`;
  14.  
  15. --------------
  16.  
  17. ALTER TABLE `minions`.`minions`
  18. CHANGE COLUMN `town_id` `town_id` INT(11) NOT NULL ;
  19.  
  20. ---------------------
  21. Create the connection via foreign key between the “products” and “categories”
  22. tables that you’ve created earlier. Make “category_id”
  23. foreign key linked to “id” in the “categories” table.
  24.  
  25. ALTER TABLE `products`
  26. ADD CONSTRAINT fk_products_categories FOREIGN KEY (`category_id`)
  27. REFERENCES categories(id);
  28.  
  29. ----------------------------
  30.  
  31. UPDATE `minions`.`minions` SET `town_id` = '2' WHERE (`id` = '3');
  32.  
  33. ---------------------------
  34.  
  35. DELETE FROM `minions`.`minions` WHERE (`id` = '2');
  36. UPDATE `minions`.`minions` SET `name` = NULL,
  37.    `age` = NULL, `town_id` = NULL WHERE (`id` = '1');
  38.    
  39. --------------------------
  40.  
  41. TRUNCATE TABLE `minions`;
  42.  
  43. --------------
  44.  
  45. ALTER TABLE `users`
  46. DROP COLUMN id, DROP PRIMARY KEY;
  47.  
  48. ALTER TABLE `users`
  49. CHANGE COLUMN `username` `pk_users` INT NOT NULL AUTO_INCREMENT,
  50. ADD PRIMARY KEY ( `pk_users`);
  51.  
  52. ------------------------
  53.  
  54. SELECT * FROM `towns` ORDER BY towns.name ;
  55.  
  56. SELECT * FROM `towns` AS t ORDER BY t.name ;
  57.  
  58. SELECT * FROM `towns` AS t ORDER BY t.name DESC ;
  59.  
  60. SELECT t.name FROM `towns` AS t ORDER BY t.name DESC ;
  61.  
  62. -----------------
  63.  
  64. UPDATE `towns` SET `name` = "Sofiaaa" WHERE (`id` = '1');
  65.  
  66. --------------------------
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