LEFT JOIN與RIGHT JOIN學習筆記

--82 SELECT COUNT(*) FROM [tbiz_PuzzleBasic] SELECT A.BasicID,A.Name,A.Gender,B.WorkID,B.Company,B.Position FROM [tbiz_PuzzleBasic] A LEFT JOIN [tbiz_PuzzleWork] B ON B.BasicID = A.BasicID 讀作:A表在B表的左邊
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