原文:mysql 一張表的多個字段關聯另外一張表

SELECT vtiger orderitem.orderid, SELECT vtiger users.last name FROM vtiger users WHERE vtiger orderitem.signatory vtiger users.id AS signatory, SELECT vtiger users.last name FROM vtiger users WHERE v ...

2018-04-26 13:25 0 4801 推薦指數:

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mysql一張多個字段關聯一張查詢

如下:一張訂單多個字段關聯用戶: 1.鏈表查詢 SELECT cu.id AS 'id',cu.version AS 'version',cu.cid AS 'cid',cu.uid AS 'uid',cu.shopName AS 'shopName',cu.address ...

Thu Nov 22 17:10:00 CST 2018 0 4598
MySQL查詢一張有多少個字段

SQL如下 select count(*) from information_schema.COLUMNS where TABLE_SCHEMA='數據庫名' and table_name='名'    ...

Thu Jun 06 18:35:00 CST 2019 0 2545
 
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