Question

我对SQL很新，我正在尝试编写一个更新语句，它实质上将数据从一列复制到另一列600条记录。

离。 ADDRESS.FIRST_NAME 即。＆＃34; JOHN＆＃34;将复制在 ADDRESS.CUSTCHAR5 ＆＃34; JOHN＆＃34;所有600条记录。我有四个列需要发生。这是我已经得到的。

DECLARE @fName CHAR，@ list CHAR，@ email CHAR，@ phoneNum CHAR
SET @fName =（选择FIRST_NAME来自ADDRESS INNER JOIN CUST   ON ADDRESS.CUST_CODE = CUST.CUST_CODE在哪里CUST.CATEGORY_CODE =   ＆＃39; SR＆＃39; AND ADDRESS.CUSTCHAR5为空）
SET @lName =（SELECT   来自ADDRESS INNER JOUST的LAST_NAME必须在ADDRESS.CUST_CODE =   CUST.CUST_CODE CUST.CATEGORY_CODE =＆＃39; SR＆＃39; AND ADDRESS.CUSTCHAR5   IS NULL）
SET @email =（从地址内部选择电子邮件   JOUST CUST ON ADDRESS.CUST_CODE = CUST.CUST_CODE WHERE   CUST.CATEGORY_CODE =＆＃39; SR＆＃39; AND ADDRESS.CUSTCHAR5是NULL）
SET @phoneNum =（选择TEL1来自地址内部联接CUST ON   ADDRESS.CUST_CODE = CUST.CUST_CODE CUST.CATEGORY_CODE =＆＃39; SR＆＃39;和   ADDRESS.CUSTCHAR5为空）
UPDATE dbo.ADDRESS
SET ADDRESS.CUSTCHAR5 = @ fName + @ lName，ADDRESS.CUSTCHAR6 =   @email，ADDRESS.CUSTMEMO1 = @phoneNum
FROM ADDRESS
INNER JOIN CUST
ON ADDRESS.CUST_CODE = CUST.CUST_CODE
WHERE CUST.CATEGORY_CODE =＆＃39; SR＆＃39;
AND ADDRESS.CUSTCHAR5   IS NULL为 AND ADDRESS.EMAIL = @email

当我运行此语句时，我收到以下错误

子查询返回的值超过1。这是不允许的子查询跟随=，！=，＆lt;，＆lt; =，＆gt;，＆gt; =或当子查询用作表达。

我很感激任何人都可以提供帮助。

Answer 1

为SQL Server尝试类似的操作。

UPDATE dbo.ADDRESS
SET 
    ADDRESS.CUSTCHAR5 = FIRST_NAME + LAST_NAME,
    ADDRESS.CUSTCHAR6 = EMAIL,
    ADDRESS.CUSTMEMO1 = TEL1 
FROM CUST 
WHERE ADDRESS.CUST_CODE = CUST.CUST_CODE
    AND CUST.CATEGORY_CODE = 'SR'
    AND ADDRESS.CUSTCHAR5 IS NULL
    AND ADDRESS.EMAIL = @email

如何使用变量更新行集

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