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';