SELECT pg_size_pretty( pg_database_size('test_db1') ) as db_size; 以下为推送内容设定 调度及推送设置 推送结果 实践:取得各 Schema 的数据使用情况 以下为 SQL 内容 SELECT schema_name, pg_size_pretty(sum(table_size)) as schema_size, cast((sum(table_size) / database_size) * 100 as DE...
db01=#select * from db01.schema01.t1; #某个数据库下面的shema的对象id--- 1(1 row) 查看schema \dn; 查看表,索引的大小 selectpg_size_pretty(pg_relation_size('cdp_order_item')); #查看表的大小selectpg_size_pretty(pg_indexes_size('cdp_order_item')); #查看索引的大小 查看表对应的索引...
typeId=1188双查询结果用法当我们需要在select后在外面在包一层select,代码如下 var getAll = db.Queryable<Order>() .Select(it => new Order { Id = * 2, Name = }) .MergeTable()//将上面的操作变成一个表 mergetable .GroupBy(it => )//对表mergetable进行分组 .Select(it =>new{ id= }).To...
All done! Fast Gel client libraries, network protocol, and the query language are designed for performance. DB / backend latency:300us1ms10ms 0 100 200 300 400 500 600 700 Requests per second. More is better.
On the other hand, MQL (MongoDB Query Language) is less powerful than SQL in handling complex queries. Operability Running a multi-node MongoDB is easier than running a multi-node Postgres, since sharding, failover are already handled by MongoDB itself. On the other hand, if you run both...
调整Postgres的配置参数,如shared_buffers、work_mem、effective_cache_size等,以适应数据库的负载和硬件资源。 查询缓存优化: 根据查询的频率和数据更新的频率,决定是否启用查询缓存。 使用pg_stat_statements扩展来分析查询的执行情况,找出频繁执行的查询并进行优化。 数据库设计优化: 合理设计数据库的表结构,避免冗余和...
6. dbForge Studio for PostgreSQL by Devart The dgForge Studio for PostgreSQL Migration Tool is your go-to solution for quickly and easily relocating your workloads and data to new storage and processing systems. It features an intuitive GUI packed with advanced options, making data migration a ...
In Oracle it stands for the size in bytes; in Postgres it stands for the number of characters. NUMBER(n, m) NUMERIC(n,m) NUMERIC(n,m)NUMBER(n, m) NUMBER type can be converted to NUMERIC, which is unlimited in size. However, the SMALLINT, INT BIGINT, REAL, an...
lrwxrwxrwx 1 postgres dba 32 Jul 26 07:21 check_postgres_custom_query -> /usr/local/bin/check_postgres.pl lrwxrwxrwx 1 postgres dba 32 Jul 26 07:21 check_postgres_database_size -> /usr/local/bin/check_postgres.pl lrwxrwxrwx 1 postgres dba 32 Jul 26 07:21 check_postgres_dbstats...
连接数据库，创建数据库连接对象 通过数据库连接对象完成数据库的增删改查 关闭数据库连 ...