Method 2. Left join to many sub-queries; each sub-query is for one storeId group by ItemId.
回复:请问 SQL 高手
Method 1. Use pivot table
Method 2. Left join to many sub-queries; each sub-query is for one storeId group by ItemId.
Method 2. Left join to many sub-queries; each sub-query is for one storeId group by ItemId.
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• 回复:回复:请问 SQL 高手 -布衣之才- ♂ (152 bytes) () 06/16/2009 postreply 18:10:20