根据库名获取所有表的信息

SELECT*
FROMinformation_schema.`TABLES`
WHERETABLE_SCHEMA = 'erp';

根据库名获取所有表名称和表说明

SELECTTABLE_NAME,TABLE_COMMENT
FROMinformation_schema.`TABLES`
WHERETABLE_SCHEMA = 'erp';

view:

根据库名获取所有的字段信息

SELECTTABLE_SCHEMA AS '库名',TABLE_NAME AS '表名',COLUMN_NAME AS '列名',ORDINAL_POSITION AS '列的排列顺序',COLUMN_DEFAULT AS '默认值',IS_NULLABLE AS '是否为空',DATA_TYPE AS '数据类型',CHARACTER_MAXIMUM_LENGTH AS '字符最大长度',NUMERIC_PRECISION AS '数值精度(最大位数)',NUMERIC_SCALE AS '小数精度',COLUMN_TYPE AS 列类型,COLUMN_KEY 'KEY',EXTRA AS '额外说明',COLUMN_COMMENT AS '注释'
FROMinformation_schema.`COLUMNS`
WHERETABLE_SCHEMA = 'erp'
ORDER BYTABLE_NAME,ORDINAL_POSITION;

view:

根据库名获取所有的库和表字段的基本信息

SELECTC.TABLE_SCHEMA AS '库名',T.TABLE_NAME AS '表名',T.TABLE_COMMENT AS '表注释',C.COLUMN_NAME AS '列名',C.COLUMN_COMMENT AS '列注释',C.ORDINAL_POSITION AS '列的排列顺序',C.COLUMN_DEFAULT AS '默认值',C.IS_NULLABLE AS '是否为空',C.DATA_TYPE AS '数据类型',C.CHARACTER_MAXIMUM_LENGTH AS '字符最大长度',C.NUMERIC_PRECISION AS '数值精度(最大位数)',C.NUMERIC_SCALE AS '小数精度',C.COLUMN_TYPE AS 列类型,C.COLUMN_KEY 'KEY',C.EXTRA AS '额外说明'
FROMinformation_schema.`TABLES` T
LEFT JOIN information_schema.`COLUMNS` C ON T.TABLE_NAME = C.TABLE_NAME
AND T.TABLE_SCHEMA = C.TABLE_SCHEMA
WHERET.TABLE_SCHEMA = 'erp' 
ORDER BYC.TABLE_NAME,C.ORDINAL_POSITION;

view: