mysql表结构查询

use information_schema;
SELECT TABLE_NAME '表名',ORDINAL_POSITION '顺序',COLUMN_NAME '字段',DATA_TYPE '类型'
       ,CHARACTER_OCTET_LENGTH '字节长',if(COLUMN_KEY='PRI',"√","") '主键',if(EXTRA='auto_increment',"√","") '自增长'
       ,if(IS_NULLABLE='YES',"√","") '空',CHARACTER_SET_NAME '编码',COLUMN_DEFAULT '默认值',COLUMN_COMMENT '说明'
FROM COLUMNS WHERE TABLE_SCHEMA = 'webmanagesystem' ORDER BY TABLE_NAME,ORDINAL_POSITION;