PostgreSql 獲取所有的表、視圖、字段、 主鍵

PostgreSQL獲取數據庫中所有view名 視圖：

SELECT   viewname   FROM   pg_views  
WHERE     schemaname ='public'  

postgreSQL獲取數據庫中所有table名 表：

SELECT   tablename   FROM   pg_tables  
WHERE   tablename   NOT   LIKE   'pg%'  
AND tablename NOT LIKE 'sql_%'
ORDER   BY   tablename;

postgreSQL獲取某個表tablename    所有字段名稱 ， 類型，備注,是否為空 等

SELECT col_description(a.attrelid,a.attnum) as comment,pg_type.typname as typename,a.attname as name, a.attnotnull as notnull
FROM pg_class as c,pg_attribute as a inner join pg_type on pg_type.oid = a.atttypid
where c.relname = 'tablename' and a.attrelid = c.oid and a.attnum>0

 

postgreSQL獲取某個表tablename  的主鍵信息

select pg_attribute.attname as colname,pg_type.typname as typename,pg_constraint.conname as pk_name from 
pg_constraint  inner join pg_class 
on pg_constraint.conrelid = pg_class.oid 
inner join pg_attribute on pg_attribute.attrelid = pg_class.oid 
and  pg_attribute.attnum = pg_constraint.conkey[1]
inner join pg_type on pg_type.oid = pg_attribute.atttypid
where pg_class.relname = 'tablename' 
and pg_constraint.contype='p'