postgresql-查看表大小

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PostgreSQL查看表大小的命令

SELECT table_name, pg_size_pretty(table_size) AS table_size, pg_size_pretty(indexes_size) AS indexes_size, pg_size_pretty(total_size) AS total_size FROM ( SELECT table_name, pg_table_size(table_name) AS table_size, pg_indexes_size(table_name) AS inde…

mysql查看表大小

mysql查看表大小一:命令 show table status like 'table_name'\G; mysql> show table status like 'x'\G; . row *************************** Name: x Engine: InnoDB Version: Row_format: Compact Rows: Avg_row_length: Data_length: Max_data_length: Index_length: Data_f…

sql server查看表大小

查看SqlServer 数据库中各个表多少行 : SELECT A.NAME ,B.ROWS FROM sysobjects A JOIN sysindexes B ON A.id = B.id WHERE A.xtype = 'U' AND B.indid IN(0,1) ORDER BY B.ROWS DESC 数据库磁盘占用量: select name, CAST(convert(float,size) * (8192.0/1024.0)/1024 AS nvarchar)+'MB' AS…

PostgreSQL查看表、表索引、视图、表结构

-- 表索引select * from pg_indexes where tablename='person_wechat_label';select * from pg_statio_all_indexes where relname='person_wechat_label';-- 所有表SELECT * FROM pg_tables;-- 所有视图SELECT * FROM pg_views;-- 表结构SELECT a.attnum,a.attname AS field,t.typnam…

SQL Server 2008系统信息查询常用命令　查看表大小、记录数等

1.返回所有数据库信息(数据库名,创建日期,存储路径等). use master; GO select * from dbo.sysdatabases 2.返回当前数据库所有对象(可根据type字段过滤出用户表,索引等). USE AdventureWorks2008R2; GO SELECT * FROM SYS.objects WHERE TYPE='U' 3.查询指定库中所有表信息(记录数,使用空间等). USE AdventureWorks2008R2; GO exec sp_MSF…

MySQL 查看表大小

当遇到数据库占用空间很大的情况下,可以用以下语句查找大数据量的表 SELECT TABLE_NAME ,),) 'DATA_SIZE(M)' ,),) 'INDEX_SIZE(M)' ,AVG_ROW_LENGTH ,MAX_DATA_LENGTH ,CREATE_TIME FROM information_schema.tables WHERE TABLE_SCHEMA ='库名' desc; 运行结果…

PostgreSQL查看表、表索引、视图、表结构以及参数设置

-- 表索引select * from pg_indexes where tablename='person_wechat_label';select * from pg_statio_all_indexes where relname='person_wechat_label';-- 所有表SELECT * FROM pg_tables;-- 所有视图SELECT * FROM pg_views;-- 表结构SELECT a.attnum,a.attname AS field,t.typnam…