 ) COMMENT = "Measures for wikis.";
 DROP TABLE IF EXISTS wiki_page_dim;
 CREATE TABLE IF NOT EXISTS wiki_page_dim (
-  `id` BIGINT PRIMARY KEY COMMENT 'Unique id for the wiki pages.',
+  `id` BIGINT COMMENT 'Unique id for the wiki pages.',
   `canvas_id` BIGINT COMMENT 'Primary key for the wiki pages table.',
   `title` VARCHAR(256) COMMENT 'Title of the wiki page.',
   `body` LONGTEXT COMMENT 'Body of the wiki page. Redshift will only load the first 256 bytes of the body.',

) COMMENT = "Rules associated with an assignment.";
DROP TABLE IF EXISTS submission_dim;
CREATE TABLE IF NOT EXISTS submission_dim (
  `id` BIGINT PRIMARY KEY COMMENT 'Unique surrogate ID for the submission.',
  `canvas_id` BIGINT COMMENT 'Primary key of this record in the Canvas submissions table.',
  `body` LONGTEXT COMMENT 'Text content for the submission.',
  `url` VARCHAR(256) COMMENT 'URL content for the submission.',

);
DROP TABLE IF EXISTS assignment_dim;
CREATE TABLE IF NOT EXISTS assignment_dim (
  `id` BIGINT COMMENT 'Unique surrogate ID for the assignment.',
  `canvas_id` BIGINT COMMENT 'Primary key for this record in the Canvas assignments table.',
  `course_id` BIGINT COMMENT 'Foreign key to the course associated with this assignment',
  `title` VARCHAR(256) COMMENT 'Title of the assignment',
