创建users表;
输入select * from users;
合并两列值为一列,取别名users_info;
输入:select name || ‘,’ || age || ‘岁’ AS users_info from users order by age,name;
创建users表;
输入select * from users;
合并两列值为一列,取别名users_info;
输入:select name || ‘,’ || age || ‘岁’ AS users_info from users order by age,name;