text: -- liquibase formatted sql
  
  -- changeset Lang:ox-user-group-1
  -- 关联表：R_USER_GROUP
  DROP TABLE IF EXISTS R_USER_GROUP;
  CREATE TABLE IF NOT EXISTS R_USER_GROUP
  (
      `GROUP_ID` VARCHAR(36) COMMENT '「groupId」- 关联组ID',
      `USER_ID`  VARCHAR(36) COMMENT '「userId」- 关联用户ID',
      `PRIORITY` INTEGER COMMENT '「priority」- 组优先级',
      PRIMARY KEY (`GROUP_ID`, `USER_ID`)
  );
  