查询mysql所有表数据、字段信息

covet 2021-11-17 原文

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;