場景描述：navicate 將postgresql表結構匯出到Excel。

1、查詢表名和表註釋

select relname as tabname,
cast(obj_description(relfilenode,'pg_class') as varchar) as comment 
from pg_class c 
where   relname ='t_bt_data' ;

2、查詢欄位名、欄位型別及欄位長度和欄位註釋

select a.attnum AS "序號",
c.relname AS "表名",
cast(obj_description(relfilenode,'
 
pg_class') as varchar) AS "表名描述",
a.attname AS "列名",
concat_ws('',t.typname,SUBSTRING(format_type(a.atttypid,a.atttypmod) from '\(.*\)')) as "欄位型別",
d.description AS "備註"
from pg_class c, pg_attribute a , pg_type t, pg_description d 
where  c.relname = 't_bt_data'
and a.attnum>0 
and a.attrelid = c.oid 
 
and a.atttypid = t.oid 
and  d.objoid=a.attrelid
and d.objsubid=a.attnum
ORDER BY c.relname DESC,a.attnum ASC ;

其他：通過查詢sql，可以匯出結果到EXCEL中。