mysql 查询库中所有的字段，逗号分隔
-- 查询mysql所有表及字段，字段逗号分隔
select table_name, concat('select ', group_concat(column_name order by ordinal_position SEPARATOR ','), ' from ', table_name) AS t_info from information_schema.COLUMNS where table_schema = 'schema' group by table_name
--查询pg所有表及字段，字段逗号分隔
select table_name, concat('select ', string_agg(column_name, ',' order by ordinal_position), ' from ', table_name) from information_schema.columns where table_schema='schema' group by table_name