常用查询语句:
说明:本sql语句适用于人大金仓数据库(kingbase) V8R6及其V8R3
--1. 统计某个模式下面每张表的数据量(行数)(这个表里的行数信息为大概值,并非和真实数据一模一样)
select t.schemaname as 模式名,t.relname as 表名, t.n_live_tup as 行数
from pg_stat_user_tables t
where t.schemaname = 'mzgl' --模式名
order by t.relname
--2. --查看数据库中表大小:
select
relname as 表名,
pg_size_pretty(sum(pg_total_relation_size(oid) ::bigint)) as 总大小,
pg_size_pretty(sum(sys_relation_size(oid) ::bigint)) as 实际大小
from sys_class t
where relname = 'ajjbxx' --表名
;
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