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關注：1
2013-05-23 12:21
求翻譯：You can link columns to other columns, arithmetic expressions, or constant values to create a character expression by using the concatenation operator (||). Columns on either side of the operator are combined to make a single output column是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
You can link columns to other columns, arithmetic expressions, or constant values to create a character expression by using the concatenation operator (||). Columns on either side of the operator are combined to make a single output column
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