Get the field information of the data table

There is a need to obtain all the fields (in the form of collections) of the data table. When querying online, group_concatthe function databases may not support this function, such as presto sql .

Therefore, it can be obtained in the following way:

select array_join(array_agg(col), ',')
from(
    select t.column_name as col
    from information_schema.columns t 
    where t.table_name = '表名'
)

Among them, all field information can be obtained from the query, which is a column named col, array_agg()which is converted into an array form through a function, and then array_join()all fields can be obtained by splicing.