desc 表名; show columns from 表名; describe 表名; show create table 表名; use information_schema select * from columns where table_name='表名'; 顺便记下: show databases; 也可以这样 use information_schema select table_sc
desc 表名; show columns from 表名; describe 表名; show create table 表名; use information_schema select * from columns where table_name='表名'; 顺便记下: show databases; 也可以这样 use information_schema select table_schema,table_name from tables where table_schema='数据库名' use 数据库名; show tables; 原有一unique索引AK_PAS_Name(PAC_Name)在表tb_webparamcounter中, 执行以下sql修改索引 alter table tb_webparamcounter drop index AK_PAS_Name; alter table tb_webparamcounter add UNIQUE AK_PAS_Name(PC_ID,PAC_Name); 若发现索引的逻辑不对,还需要再加一个字段进去,执行 alter table tb_webparamcounter drop index AK_PAS_Name; alter table tb_webparamcounter add UNIQUE AK_PAS_Name(PC_ID,PAC_Name,PAC_Value); 注意:这时的PC_ID,PAC_Name,PAC_Value三个字段不是FOREIGN KEY 否则必需先drop FOREIGN KEY,再重做上一步才行 获取列名数据类型备注 SELECT COLUMN_NAME, DATA_TYPE, COLUMN_COMMENT FROM information_schema.columns WHERE table_name = ?