合并/加入SQL选择查询

我正在努力结合下面的Select Statements，我知道我可以作弊并添加一些虚假的列然后使用Union，但我想正确地做到这一点。一旦我将他们加入，我将把这个陈述放入一个用于Word和CRM4的XML文件中。合并/加入SQL选择查询

SELECT BILLTO_NAME, 
     BILLTO_LINE1, 
     BILLTO_LINE2, 
     BILLTO_LINE3, 
     BILLTO_CITY, 
     BILLTO_COUNTRY, 
     BILLTO_POSTALCODE, 
     ORDERNUMBER, 
     REQUESTDELIVERYBY, 
     MODIFIEDON, 
     SHIPTO_NAME, 
     SHIPTO_LINE1, 
     SHIPTO_LINE2, 
     SHIPTO_LINE3, 
     SHIPTO_CITY, 
     SHIPTO_STATEORPROVINCE, 
     SHIPTO_COUNTRY, 
     SHIPTO_POSTALCODE, 
     CREATEDBY 
FROM SALESORDERBASE 



SELECT QUANTITY, 
     DESCRIPTION 
FROM SALESORDERDETAILBASE 

SELECT NEW_ORDERNOTES, 
     NEW_NOTES 
FROM SALESORDEREXTENSIONBASE

它们都具有SalesOrderID的公共列，我需要在某处添加它。

来源

2012-10-15 Ryan Keen

您可以在表上使用LEFT JOIN的OP：

SELECT ob.SalesOrderID 
     ob.BILLTO_NAME, 
     ob.BILLTO_LINE1, 
     ob.BILLTO_LINE2, 
     ob.BILLTO_LINE3, 
     ob.BILLTO_CITY, 
     ob.BILLTO_COUNTRY, 
     ob.BILLTO_POSTALCODE, 
     ob.ORDERNUMBER, 
     ob.REQUESTDELIVERYBY, 
     ob.MODIFIEDON, 
     ob.SHIPTO_NAME, 
     ob.SHIPTO_LINE1, 
     ob.SHIPTO_LINE2, 
     ob.SHIPTO_LINE3, 
     ob.SHIPTO_CITY, 
     ob.SHIPTO_STATEORPROVINCE, 
     ob.SHIPTO_COUNTRY, 
     ob.SHIPTO_POSTALCODE, 
     ob.CREATEDBY, 
     od.QUANTITY, 
     od.DESCRIPTION, 
     oe.NEW_ORDERNOTES, 
     oe.NEW_NOTES 
FROM SALESORDERBASE ob 
LEFT JOIN SALESORDERDETAILBASE od 
    on ob.SalesOrderID = od.SalesOrderID 
LEFT JOIN SALESORDEREXTENSIONBASE oe 
    on ob.SalesOrderID = oe.SalesOrderID

来源

2012-10-15 18:47:51 Taryn

谢谢你们，我想这是一个加入我需要的，但不能肯定的是，我对SalesOrderBase和SalesOrderDetailBase都有一个Description列的事实存在一些小问题，我想我可以拿出一个。有没有人对我可以阅读的SQL书有任何建议？ Ry –

@RyanKeen你需要做的就是为这些字段提供一个别名。那么你应该没有问题从两列中返回数据。 :) – Taryn

非常感谢您的帮助。 –

假设标识的关系被称为ID在所有三个表的列，你可以这样做：

SELECT sob.BILLTO_NAME, 
    sob.BILLTO_LINE1, 
    sob.BILLTO_LINE2, 
    sob.BILLTO_LINE3, 
    sob.BILLTO_CITY, 
    sob.BILLTO_COUNTRY, 
    sob.BILLTO_POSTALCODE, 
    sob.ORDERNUMBER, 
    sob.REQUESTDELIVERYBY, 
    sob.MODIFIEDON, 
    sob.SHIPTO_NAME, 
    sob.SHIPTO_LINE1, 
    sob.SHIPTO_LINE2, 
    sob.SHIPTO_LINE3, 
    sob.SHIPTO_CITY, 
    sob.SHIPTO_STATEORPROVINCE, 
    sob.SHIPTO_COUNTRY, 
    sob.SHIPTO_POSTALCODE, 
    sob.CREATEDBY, 
    sodb.QUANTITY, 
    sodb.DESCRIPTION, 
    soeb.NEW_ORDERNOTES, 
    soeb.NEW_NOTES 
From SalesOrderBase sob 
JOIN SalesOrderDetailBase sodb 
    ON sob.id = sodb.SalesOrderID 
JOIN SalesOrderExtensionBase soeb 
    ON sob.id = soeb.SalesOrderID

你能想到的加盟为行砰一起并排侧，而UNIONing被砰的一起排在另一排之上。 UNION要求列是相同的，JOIN要求每行之间有某种关系。

编辑 - 提供更多的细节

来源

2012-10-15 18:44:52 monitorjbl

感谢您的帮助:-) –

合并/加入SQL选择查询

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