常用SQL整理—Mysql
1、查看表字段、字段类型、表结构说明：
use information_schema;
select column_name,data_type,column_type,column_comment from information_schema.columns where table_schema ='@databaseName' and table_name = '@tableName';
例：use information_schema;
select column_name,data_type,column_type,column_comment from information_schema.columns where table_schema ='acsdb' and table_name = 'tbl_ai_alarm_info_20191011';