FROM information_schema.tables WHERE table_type = 'BASE TABLE' AND table_schema NOT IN ('pg_catalog', 'information_schema'); 列出所有视图 -- with postgresql 7.2: SELECT viewname FROM pg_views WHERE viewname !~ '^pg_'; -- with postgresql 7.4 and later: SELECT viewname ...
利用函数来对postgresql 数据库进行表的尺寸的统计 select pg_database.datname, pg_size_pretty(pg_database_size(pg_database.datname)) AS size from pg_database select relname, pg_size_pretty(pg_relation_size(relid)) from pg_stat_user_tables where schemaname='public' order by pg_relation_size...
monitoring, or reporting. There are a couple of methods to accomplish this, using either SQL queries that interact with PostgreSQL’s system catalog or by querying the pg_stat_user_tables system view, which provides statistical information about...
2、通过SQL语句查询 "select * from pg_tables" —— 得到当前db中所有表的信息(这里pg_tables是系统视图) "select tablename from pg_tables where schemaname='public'" —— 得到所有用户自定义表的名字(这里"tablename"字段是表的名字,"schemaname"是schema的名字。用户自定义的表,如果未经特殊处理,默认都...
一种是通过数据字典pg_tables来查看,相当于Oracle里面的all_tables 或者是使用information_schema里面的tables来查看。 postgres=# select *from information_schema.tables; postgres=# select *from pg_tables; PG里面的information_schema比较特别,在数据库中直接\l无法看到,但是确确实实存在,着数据字典风格和MySQL很...
[, ...] ] abbreviated_grant_or_revoke where abbreviated_grant_or_revoke is one of: GRANT { { SELECT | INSERT | UPDATE | DELETE | TRUNCATE | REFERENCES | TRIGGER } [, ...] | ALL [ PRIVILEGES ] } ON TABLES TO { [ GROUP ] role_name | PUBLIC } [, ...] [ WITH GRANT OPTION...
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO username; 6)授予public模式中所有序列的所有权限给用户: GRANT ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public TO username; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. ...
In this query, we use a condition in the WHERE clause to exclude the system tables. If you omit the WHERE clause, you will get many tables including the system ones. Summary Use the \dt or \dt+ command in psql to show tables in a specific database. Use the SELECT statement to query...
do $$declarer record;beginforrin(selecttablenamefrompg_tableswhereschemaname='my-schema-name')loopexecute'drop table if exists'||quote_ident(r.tablename)||'cascade';endloop;end$$; This query works by listing out all the tables in the given schema and then executing adrop tablefor each (...
(S.backendid) AS current_query FROM (SELECT pg_stat_get_backend_idset() AS backendid) AS S ) AS S WHERE current_query <> '<IDLE>' ORDER BY lap DESC; # 参数解释 procpid:进程id start:进程开始时间 lap:经过时间 current_query:执行中的sql # 通过命令: =# select pg_cancel_backend(...