根据库名获取所有表的信息

SELECT
    *
FROM
    information_schema.`TABLES`
WHERE
    TABLE_SCHEMA = erp;

根据库名获取所有表名称和表说明

SELECT
    TABLE_NAME,
    TABLE_COMMENT
FROM
    information_schema.`TABLES`
WHERE
    TABLE_SCHEMA = erp;

view:

根据库名获取所有的字段信息

SELECT
    TABLE_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
FROM
    information_schema.`COLUMNS`
WHERE
    TABLE_SCHEMA = erp
ORDER BY
    TABLE_NAME,
    ORDINAL_POSITION;

view:

根据库名获取所有的库和表字段的基本信息

SELECT
    C.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
FROM
    information_schema.`TABLES` T
LEFT JOIN information_schema.`COLUMNS` C ON T.TABLE_NAME = C.TABLE_NAME
AND T.TABLE_SCHEMA = C.TABLE_SCHEMA
WHERE
    T.TABLE_SCHEMA = erp 
ORDER BY
    C.TABLE_NAME,
    C.ORDINAL_POSITION;

view: