动态生成删除piblic模式下的所有视图SQL;
select 'drop view '||viewname||';' from pg_views where schemaname='public'
动态生成将public模式下所有表的primary_pollutant长度设为50的SQL
select 'alter table '||tablename||' alter column primary_pollutant TYPE varchar(50);'
from pg_tables t where schemaname='public';
参考:https://blog.csdn.net/kangming310/article/details/45313309