mysql-5.7.33利用navicat导出字典表

上网找了好几个语句都不好使，最后这个好使：

SELECT
    TABLE_SCHEMA AS '数据库',
    TABLE_NAME AS '表名',
    column_name AS '字段名称',
    COLUMN_TYPE AS '字段类型',
    IS_NULLABLE AS '是否为空',
   COLUMN_DEFAULT AS '默认值',
   column_comment AS '字段备注'
FROM
   information_schema. COLUMNS
WHERE
    table_name = 'ums_user'