Sql server SQL Server中的矩阵输出类型

我需要获得订阅频道的客户数

Where channel = telugu and channel = hindi

Where channel = telugu and channel = English 

Where channel = hindi and channel = English

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我想我知道你想要什么。。。客户可以有多个渠道，您有兴趣统计拥有特定渠道组合的客户。 如果这是正确的，并且您的组合都具有相同数量的元素，那么您可以使用如下内容

IF OBJECT_ID('tempdb..#channel_pairs', 'U') IS NOT NULL 
BEGIN DROP TABLE #channel_pairs; END;

CREATE TABLE #channel_pairs (
    c1 varchar(20) NOT NULL,
    c2 varchar(20) NOT null
    );
INSERT #channel_pairs (c1, c2) VALUES ('telugu', 'hindi'), ('telugu', 'English'), ('hindi', 'English');

SELECT 
    channel_pair = cp.c1 + ', ' + cp.c2,
    cp_count = COUNT(1)
FROM
    dbo.customer_channel cc1
    JOIN dbo.customer_channel cc2
        ON cc1.customer_id = cc2.customer_id
    JOIN #channel_pairs cp
        ON cc1.channel = cp.c1
        AND cc2.channel = cp.c2;

你的WHERE子句不起作用。channel=telugu和channel=hindi的位置将不匹配。你可能想要一个手术室