MySql获取表结构信息

SELECTTABLE_NAME,TABLE_COMMENT
FROMinformation_schema.`TABLES`
WHERETABLE_SCHEMA = 'dm' -- dm 是数据库名称，需替换
ORDER BYTABLE_NAME;

MySql获取字段信息

SELECTTABLE_NAME AS 'tableName',COLUMN_NAME AS 'columnName',COLUMN_COMMENT AS 'columnComment',IS_NULLABLE AS 'nullable',DATA_TYPE AS 'dataType',CHARACTER_MAXIMUM_LENGTH AS 'strLength',NUMERIC_PRECISION AS 'numLength',NUMERIC_SCALE AS 'numBit'
FROMinformation_schema.`COLUMNS`
WHERETABLE_SCHEMA = 'dm' -- dm 是数据库名称，需替换
AND TABLE_NAME = 'base_auth_resource' -- base_auth_resource 是表名，需替换
ORDER BYTABLE_NAME,ORDINAL_POSITION;

Oracle获取表结构信息

select t.table_name, c.COMMENTSfrom user_tables t, user_tab_comments cwhere t.TABLE_NAME = c.TABLE_NAMEorder by t.table_name

Oracle获取字段信息

select t.TABLE_NAME     AS tableName,t.COLUMN_NAME    AS columnName,c.COMMENTS       AS columnComment,t.NULLABLE       AS nullable,t.DATA_TYPE      AS dataType,t.CHAR_LENGTH    AS strLength,t.data_length  as dataLength,t.DATA_PRECISION AS numLength,t.DATA_SCALE     AS numBitfrom user_tab_columns t, user_col_comments cwhere t.TABLE_NAME = c.TABLE_NAMEand t.COLUMN_NAME = c.COLUMN_NAMEand t.TABLE_NAME = 'EMP' -- EMP 是表名，需替换order by t.TABLE_NAME, t.COLUMN_ID