运用postgres常用方法

• psql下，显示全部数据库中全部表达方法

           select * from pg_tables；

               select * from pg_tables where not tablename like 'pg%' order by tablename;

               select * from pg_tables where tableowner = 'sak' order by tablename;

               select * from pg_tables where tablename like 'pg%' order by tablename;

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