Question

我需要比较表中的电子邮件，如果它们匹配，我需要显示第三张表中的一些数据，我试图通过while循环来做到这一点，该循环遍历所有电子邮件的字符串并对其进行比较，如果有一个匹配项，它应该从第三张表中获取数据

我从以下位置粘贴来自pastebin的查询：https://pastebin.com/zyjcJngf

我要使用循环的部分

select distinct Email,
CASE dbo.spValueToString((SELECT COUNT(*) 
    FROM tblEmailBlackList WHERE tblEmailBlackList.Email=LiveCampaign_SubscriberList_Email.Email AND tblEmailBlackList.PortalID>=-1))
WHEN 'Da' THEN

    WHILE @vsi > 1
    BEGIN
        SET @testEmail = (SELECT LEFT(@resultCpy, CHARINDEX(',', @resultCpy) - 1)) --dobi prvi mail
        SET @testEmail = (SELECT REPLACE(@testEmail, ' ', '')) --zbriše vse ' ' če obstajajo
        SET @resultCpy = (SELECT SUBSTRING(@resultCpy, LEN(@testEmail) + 2, LEN(@resultCpy))) --odstani prvi mail
        IF      
            @testEmail = Email
            BREAK
        ELSE
            SET @vsi = @vsi - 1
    END
    SET @vsi = (SELECT LEN(@result) - LEN(REPLACE(@result, ',', '')) + 1)
    SET @resultCpy = @result

    (SELECT DISTINCT PortalLocalization.PortalName
    FROM tblEmailBlackList
    LEFT JOIN tblLiveCampaignSettings ON tblLiveCampaignSettings.ModuleID = tblEmailBlackList.ModuleID
    LEFT JOIN PortalLocalization ON PortalLocalization.PortalID = tblEmailBlackList.PortalID AND PortalLocalization.CultureCode = 'sl-SI'
    WHERE Email = @testEmail
    AND tblEmailBlackList.PortalID >= 0
    UNION
    SELECT DISTINCT PortalLocalization.PortalName
    FROM tblEmailBlackList
    LEFT JOIN vw_TabModules ON vw_TabModules.ModuleID = tblEmailBlackList.ModuleID
    LEFT JOIN PortalLocalization ON PortalLocalization.PortalID = vw_TabModules.PortalID AND PortalLocalization.CultureCode = 'sl-SI'
    WHERE Email = @testEmail
    AND tblEmailBlackList.PortalID = -1)    
ELSE 'Ne' END
AS LocalBlockList
FROM LiveCampaign_SubscriberList_Email

我在这里遇到的问题是，在代码中添加循环时出现错误，但是如果我单独运行循环，它将起作用。我在WHILE附近得到错误的语法，并且无法绑定多部分标识符“ LiveCampaign_SubscriberList_Email.Email”。

Answer 1

您不能在SELECT语句中放置“ WHILE”。

尝试在SELECT之前处理数据，也许在临时表中。

我在SQL中使用循环有什么错

1 个答案: