小編給大家分享一下MySQL怎樣查詢所有表和字段信息，希望大家閱讀完這篇文章后大所收獲，下面讓我們一起去探討吧！

讓客戶滿意是我們工作的目標(biāo)，不斷超越客戶的期望值來自于我們對(duì)這個(gè)行業(yè)的熱愛。我們立志把好的技術(shù)通過有效、簡單的方式提供給客戶，將通過不懈努力成為客戶在信息化領(lǐng)域值得信任、有價(jià)值的長期合作伙伴，公司提供的服務(wù)項(xiàng)目有：主機(jī)域名、網(wǎng)站空間、營銷軟件、網(wǎng)站建設(shè)、鐵山港網(wǎng)站維護(hù)、網(wǎng)站推廣。

mysql查詢所有表和字段信息的方法：1、根據(jù)庫名獲取所有表的信息【information_schema.`TABLES`】；2、根據(jù)庫名獲取所有的字段信息【ORDINAL_POSITION AS '列的排列順序'】。

mysql查詢所有表和字段信息的方法：

1、根據(jù)庫名獲取所有表的信息

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

2、根據(jù)庫名獲取所有表名稱和表說明

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

view:

3、根據(jù)庫名獲取所有的字段信息

SELECT
    TABLE_SCHEMA AS '庫名',
    TABLE_NAME AS '表名',
    COLUMN_NAME AS '列名',
    ORDINAL_POSITION AS '列的排列順序',
    COLUMN_DEFAULT AS '默認(rèn)值',
    IS_NULLABLE AS '是否為空',
    DATA_TYPE AS '數(shù)據(jù)類型',
    CHARACTER_MAXIMUM_LENGTH AS '字符最大長度',
    NUMERIC_PRECISION AS '數(shù)值精度(最大位數(shù))',
    NUMERIC_SCALE AS '小數(shù)精度',
    COLUMN_TYPE AS 列類型,
    COLUMN_KEY 'KEY',
    EXTRA AS '額外說明',
    COLUMN_COMMENT AS '注釋'
FROM
    information_schema.`COLUMNS`
WHERE
    TABLE_SCHEMA = 'erp'
ORDER BY
    TABLE_NAME,
    ORDINAL_POSITION;

view:

4、根據(jù)庫名獲取所有的庫和表字段的基本信息

SELECT
    C.TABLE_SCHEMA AS '庫名',
    T.TABLE_NAME AS '表名',
    T.TABLE_COMMENT AS '表注釋',
    C.COLUMN_NAME AS '列名',
    C.COLUMN_COMMENT AS '列注釋',
    C.ORDINAL_POSITION AS '列的排列順序',
    C.COLUMN_DEFAULT AS '默認(rèn)值',
    C.IS_NULLABLE AS '是否為空',
    C.DATA_TYPE AS '數(shù)據(jù)類型',
    C.CHARACTER_MAXIMUM_LENGTH AS '字符最大長度',
    C.NUMERIC_PRECISION AS '數(shù)值精度(最大位數(shù))',
    C.NUMERIC_SCALE AS '小數(shù)精度',
    C.COLUMN_TYPE AS 列類型,
    C.COLUMN_KEY 'KEY',
    C.EXTRA AS '額外說明'
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:

看完了這篇文章，相信你對(duì)mysql怎樣查詢所有表和字段信息有了一定的了解，想了解更多相關(guān)知識(shí)，歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道，感謝各位的閱讀！