您可以使用

DO $$ DECLARE
    r RECORD;
BEGIN
    -- if the schema you operate on is not "current", you will want to
    -- replace current_schema() in query with 'schematodeletetablesfrom'
    -- *and* update the generate 'DROP...' accordingly.
    FOR r IN (SELECT tablename FROM pg_tables WHERE schemaname = current_schema()) LOOP
        EXECUTE 'DROP TABLE IF EXISTS ' || quote_ident(r.tablename) || ' CASCADE';
    END LOOP;
END $$;

IMO这比丢弃模式public要好，因为您不需要重新创建模式并恢复所有授权。

额外的好处是，这不需要外部脚本语言，也不需要将生成的SQL复制粘贴回解释器。

你需要删除表和序列，这是对我有用的

psql -qAtX -c "select 'DROP TABLE IF EXISTS ' || quote_ident(table_schema) || '.' || quote_ident(table_name) || ' CASCADE;' FROM information_schema.tables where table_type = 'BASE TABLE' and not table_schema ~ '^(information_schema|pg_.*)$'" | psql -qAtX
psql -qAtX -c "select 'DROP SEQUENCE IF EXISTS ' || quote_ident(relname) || ' CASCADE;' from pg_statio_user_sequences;" | psql -qAtX

在运行该命令之前，可能需要sudo/su到postgres用户或（导出连接详细信息PGHOST、PGPORT、PGUSER和PGPASSWORD），然后导出PGDATABASE=yourdatabase

Rails的Rake任务用于销毁当前数据库中的所有表

namespace :db do
  # rake db:drop_all_tables
  task drop_all_tables: :environment do
    query = <<-QUERY
      SELECT
        table_name
      FROM
        information_schema.tables
      WHERE
        table_type = 'BASE TABLE'
      AND
        table_schema NOT IN ('pg_catalog', 'information_schema');
    QUERY

    connection = ActiveRecord::Base.connection
    results    = connection.execute query

    tables = results.map do |line|
      table_name = line['table_name']
    end.join ", "

    connection.execute "DROP TABLE IF EXISTS #{ tables } CASCADE;"
  end
end

以下步骤可能会有所帮助（对于linux用户）：

首先，通过以下命令输入postgres命令提示符：sudo-u postgres psql通过以下命令输入数据库（我的数据库名为：maoss）：\c猫现在输入删除所有表格的命令：DROP SCHEMA公共级联；CREATE SCHEMA公共；向公众授予所有计划；向公众公开所有计划；现在通过以下命令退出psql：\问

在pgAdmin中使用此脚本：

DO $$
DECLARE 
    brow record;
BEGIN
    FOR brow IN (select 'drop table "' || tablename || '" cascade;' as table_name from pg_tables where schemaname = 'public') LOOP
        EXECUTE brow.table_name;
    END LOOP;
END; $$

如果要删除数据（而不是删除表）：

-- Truncate tables and restart sequnces
SELECT 'TRUNCATE TABLE "' || table_schema || '"."' || table_name || '" RESTART IDENTITY CASCADE;' 
FROM information_schema.tables 
WHERE table_catalog = '<database>' AND table_schema = '<schema>';

或者，如果您想要删除表，可以使用以下sql：

-- For tables
SELECT 'DROP TABLE "' || table_schema || '"."' || table_name || '" CASCADE;' 
FROM information_schema.tables 
WHERE table_catalog = '<database>' AND table_schema = '<schema>';

-- For sequences
SELECT 'DROP SEQUENCE d_a_seq "' || sequence_schema || '"."' || sequence_name || '";' 
FROM information_schema.sequences 
WHERE sequence_catalog = '<database>' AND sequence_schema = '<schema>';