Sql查询MySql数据库中的表名和描述表中字段(列)信

SELECT table_name name,TABLE_COMMENT value FROM INFORMATION_SCHEMA.TABLES WHERE table_type='base table' 
and table_schema = '数据库名' order by table_name asc

select ORDINAL_POSITION as Colorder,Column_Name as ColumnName,data_type as TypeName,COLUMN_COMMENT as DeText,
(case when data_type = 'float' or data_type = 'double' or data_type = 'decimal' then NUMERIC_PRECISION else CHARACTER_MAXIMUM_LENGTH end ) as length,
NUMERIC_SCALE as Scale,( case when EXTRA='auto_increment' then 1 else 0 end) as IsIdentity,(case when COLUMN_KEY='PRI' then 1 else 0 end) as IsPK,
(case when IS_NULLABLE = 'NO' then 0 else 1 end)as CanNull,COLUMN_DEFAULT as DefaultVal
from information_schema.columns where table_schema = '数据库名' and table_name = '表名' order by ORDINAL_POSITION asc