SqlServer与MySql 系统表查询自建表数据

SqlServer：

SELECT * FROM sys.sysobjects WHERE type='U' ORDER BY name

SELECT * FROM sys.syscolumns WHERE id=1163151189

SELECT * FROM sys.extended_properties WHERE major_id=1163151189 AND minor_id=9

SELECT a.name, a.id, a.colid, b.value from sys.syscolumns a JOIN sys.extended_properties b ON a.id=b.major_id AND a.colid=b.minor_id WHERE major_id=939150391

-- 查询库中每张表当前的行数

SELECT a.name,b.rows FROM sysobjects a INNER JOIN sysindexes b ON a.id=b.id WHERE b.indid IN(0,1) AND a.Type='u' ORDER BY a.name

MySql：

SELECT * FROM information_schema.TABLES WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='表名';

SELECT * FROM information_schema.COLUMNS WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='表名' AND COLUMN_NAME='列表'

desc user_academy_team_join;

describe user_academy_team_join;

show COLUMNS from user_academy_team_join;

EXPLAIN user_academy_team_join;

-- 查询库中每张表当前的行数

select table_schema,table_name,table_type,table_rows from information_schema.tables where table_schema='rule_ceshi' and table_name='operation_log';