选择、修改和插入同一个表 [英] Select, Modify and insert into the same table

问题描述

选择一行、修改几列并将其插入同一个表的最简单方法是什么?我正在尝试根据另一行插入一个新行.

What's the easiest way to select a row, modify couple of columns and insert it to the same table? I'm trying to insert a new row based on another.

推荐答案

INSERT INTO table2 (column1, column2, column3)
SELECT column1, 'no', column3 FROM table2 WHERE column2 = 'yes'

希望您能更清楚地了解如何执行此操作.如您所见，我从 table2 中抓取了两列，对于另一列，我使用了文本值而不是 column2 的值.

Hopefully this is a bit clearer as to how you do this. As you can see, I've grabbed two columns from table2 and for the other column I used a text value for instead of the value for column2.

您可以使用的其他模式:

Other patterns you can use:

组合一列和一些其他文本(假设该列已经是字符串数据类型.

Combine a column and some other text (Assumes the column is already a string data type.

INSERT INTO table2 (column1, column2)
SELECT column1 + 'no', column2 FROM table2 WHERE column2 = 'yes'

组合一列和一些文本，一个是列是字符串的例子，另一个不是.

Combine a column and some text, One example where the column is a string and one where it is not.

INSERT INTO table2 (column1, column2)
SELECT column1 + 'no', 'A' + cast(column2 as Varchar (10)) FROM table2 WHERE column2 = 'yes'

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