31 lines
1.1 KiB
SQL
31 lines
1.1 KiB
SQL
SELECT count(*)
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FROM ((SELECT DISTINCT c_last_name,
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c_first_name,
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d_date
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FROM store_sales,
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date_dim,
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customer
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WHERE store_sales.ss_sold_date_sk = date_dim.d_date_sk
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AND store_sales.ss_customer_sk = customer.c_customer_sk
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AND d_month_seq BETWEEN 1200 AND 1200+11)
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EXCEPT
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(SELECT DISTINCT c_last_name,
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c_first_name,
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d_date
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FROM catalog_sales,
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date_dim,
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customer
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WHERE catalog_sales.cs_sold_date_sk = date_dim.d_date_sk
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AND catalog_sales.cs_bill_customer_sk = customer.c_customer_sk
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AND d_month_seq BETWEEN 1200 AND 1200+11)
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EXCEPT
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(SELECT DISTINCT c_last_name,
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c_first_name,
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d_date
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FROM web_sales,
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date_dim,
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customer
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WHERE web_sales.ws_sold_date_sk = date_dim.d_date_sk
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AND web_sales.ws_bill_customer_sk = customer.c_customer_sk
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AND d_month_seq BETWEEN 1200 AND 1200+11)) cool_cust ;
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